CX81801 Conexant Systems, Inc., CX81801 Datasheet

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CX81801

Manufacturer Part Number
CX81801
Description
Manufacturer
Conexant Systems, Inc.
Datasheet

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Doc. No. 102247B
October 30, 2003
CX81801-7x/8x
SmartV.XX
V.92/V.34/V.32bis Modem in 128-Pin LQFP
with CX20493 SmartDAA in 32-Pin LQFP
and Optional CX20442 Voice Codec
Data Sheet

Related parts for CX81801

CX81801 Summary of contents

Page 1

... CX81801-7x/8x SmartV.XX V.92/V.34/V.32bis Modem in 128-Pin LQFP with CX20493 SmartDAA in 32-Pin LQFP and Optional CX20442 Voice Codec Data Sheet Doc. No. 102247B October 30, 2003 ...

Page 2

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Revision Record Revision A B © 2003 Conexant Systems, Inc. All Rights Reserved. Information in this document is provided in connection with Conexant Systems, Inc. (“Conexant”) products. These materials are provided by Conexant as a service to its customers and may be used for informational purposes only. Conexant assumes no responsibility for errors or omissions in these materials ...

Page 3

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Contents 1. Introduction..........................................................................................................................................1-1 1.1 Overview ......................................................................................................................................................................... 1-1 1.2 Applications .................................................................................................................................................................... 1-2 1.3 Features .......................................................................................................................................................................... 1-4 1.3.1 General Modem Features................................................................................................................................ 1-4 1.3.2 SmartDAA Features ........................................................................................................................................ 1-5 1.3.3 Applications.................................................................................................................................................... 1-5 1.4 Technical Overview......................................................................................................................................................... 1-6 1.4.1 General Description ........................................................................................................................................ 1-6 1.4.2 MCU Firmware................................................................................................................................................ 1-6 1.4.3 Operating Modes ............................................................................................................................................ 1-6 1.4.3.1 Data/Fax Modes.......................................................................................................................... 1-6 1.4.3.2 V.44 Data Compression.............................................................................................................. 1-7 1.4.3.3 Worldwide Operation.................................................................................................................. 1-7 1.4.3.4 TAM Mode.................................................................................................................................. 1-8 1.4.3.5 Speakerphone Mode (S Models)................................................................................................ 1-9 1 ...

Page 4

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 2.4 Data Mode ...................................................................................................................................................................... 2-4 2.4.1 Speed Buffering (Normal Mode) .................................................................................................................... 2-4 2.4.2 Flow Control ................................................................................................................................................... 2-4 2.4.3 Escape Sequence Detection............................................................................................................................ 2-4 2.4.4 BREAK Detection ............................................................................................................................................ 2-4 2.4.5 Telephone Line Monitoring............................................................................................................................. 2-4 2.4.6 Fall Forward/Fallback (V.92/V.90/V.34/V.32 bis/V.32) ................................................................................... 2-4 2.4.7 Retrain ............................................................................................................................................................ 2-5 2.4.8 Programmable Inactivity Timer ...................................................................................................................... 2-5 2.4.9 DTE Signal Monitoring (Serial DTE Interface Only) ........................................................................................ 2-5 2 ...

Page 5

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3. Hardware Interface ...............................................................................................................................3-1 3.1 CX81801 Modem Hardware Pins and Signals ................................................................................................................ 3-1 3.1.1 Common to Parallel and Serial Interface Configurations................................................................................ 3-1 3.1.1.1 LSD Interface (Through DIB)...................................................................................................... 3-1 3.1.1.2 Call Progress Speaker Interface ................................................................................................. 3-1 3.1.1.3 Voice Relay Interface (S Models) ............................................................................................... 3-1 3.1.1.4 Serial EEPROM Interface............................................................................................................ 3-1 3.1.1.5 External Bus Interface ................................................................................................................ 3-2 3 ...

Page 6

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 5.2.10 Divisor Registers (Addr = 0 and 1, DLAB = 1).............................................................................................. 5-10 5.3 Receiver FIFO Interrupt Operation ................................................................................................................................ 5-10 5.3.1 Receiver Data Available Interrupt ................................................................................................................. 5-10 5.3.2 Receiver Character Timeout Interrupts......................................................................................................... 5-11 5.4 Transmitter FIFO Interrupt Operation ........................................................................................................................... 5-11 5.4.1 Transmitter Empty Interrupt......................................................................................................................... 5-11 vi Conexant 102247B ...

Page 7

... Figure 2-1. TMIND# Test Results Pulse Cycles ................................................................................................................ 2-12 Figure 3-1. CX81801 Modem Hardware Signals for Parallel Interface (PARIF = High) ...................................................... 3-4 Figure 3-2. CX81801 Modem 128-Pin LQFP Pin Signals for Parallel Interface (PARIF = High) ......................................... 3-5 Figure 3-3. CX81801 Modem Hardware Signals for Serial Interface (PARIF = Low)........................................................ 3-12 Figure 3-4. CX81801 Modem 128-Pin LQFP Pin Signals for Serial Interface (PARIF = Low)........................................... 3-13 Figure 3-5 ...

Page 8

... Table 3-1. CX81801 Modem 128-Pin LQFP Pin Signals for Parallel Interface (PARIF = High)........................................... 3-6 Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) ................................................. 3-8 Table 3-3. CX81801 Modem 128-Pin LQFP Pin Signals for Serial Interface (PARIF = Low) ............................................ 3-14 Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low)................................................... 3-16 Table 3-5 ...

Page 9

... MCU firmware from the host/DTE to the SmartV.XX modem. The SmartV.XX Modem device set consists of a CX81801 modem device in a 128-pin LQFP and a CX20493 SmartDAA Line Side Device (LSD 32-pin LQFP Conexant’s SmartDAA technology eliminates the need for a costly analog transformer, relays and opto-isolations typically used in discrete DAA (Data Access Arrangement) implementations ...

Page 10

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 1.2 Applications • Set top boxes • Gaming devices • Point of sale terminals • Remote monitoring and data collections systems • Handheld computers • Other embedded systems Table 1-1. SmartV.XX Modem Models and Functions ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 1-1. SmartV.XX Modem Simplified Interface Diagram PARALLEL HOST BUS OR SERIAL DTE CX81801 INTERFACE Modem 128-Pin LQFP Figure 1-2. SmartV.XX Modem Major Interfaces CX81801 Modem 128-Pin LQFP SmartDAA Interface Paralle Host Microcontroller ...

Page 12

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 1.3 Features 1.3.1 General Modem Features • Data modem − − − • Data compression and error correction − − − • Fax modem send and receive rates up to 14.4 kbps − − ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet • Full-duplex speakerphone (FDSP) mode using optional CX20442 Voice Codec (S models) − − − − − • Built-in host/DTE interface − − • Downloadable architecture • Direct mode (serial DTE interface) • ...

Page 14

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 1.4 Technical Overview 1.4.1 General Description Modem operation, including dialing, call progress, telephone line interface, telephone handset interface, optional voice/speakerphone interface, and host interface functions are supported and controlled through the V.250, V.251, and V.253-compatible command set. ...

Page 15

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet speeds kbps. When PCM upstream is disabled, data transmission supports sending data at line speeds up to V.34 rates. This mode can fallback to V.34 mode and to lower rates as dictated by line conditions. The following modes are supported in V.92 models when connected to a V.92- compatible server supporting the feature listed. • ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 1-2. Default Countries Supported Country Australia Austria Belgium Brazil China Denmark Finland France Germany Hong Kong India Ireland Italy Japan Korea Malaysia Mexico Netherlands Norway Poland Portugal Singapore South Africa ...

Page 17

... Modem Data Pump (MDP), 256 KB internal ROM internal RAM, and SmartDAA interface functions. The CX81801 Modem connects to host via a parallel host (PARIF = high logical V.24 (EIA/TIA-232-E) serial DTE interface (PARIF = low). The CX81801 Modem performs the command processing and host interface functions. ...

Page 18

... The DIB transformer couples power and clock from the CX81801 to the LSD. The DIB data channel supports bidirectional half-duplex serial transfer of data, control, and status information between the CX81801 and the LSD over two lines. ...

Page 19

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Fax Mode Operation. Facsimile functions operate in response to fax class 1 commands when +FCLASS fax class 1.0 commands when +FCLASS=1.0. Voice/Audio Operation. Voice/audio functions operate in response to voice/audio commands when +FCLASS=8. Speakerphone Operation. FDSP functions operate in response to speakerphone commands when +FCLASS=8 and +VSP=1 is selected ...

Page 20

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 1-12 This page is intentionally blank. Conexant 102247B ...

Page 21

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 2. Technical Specifications 2.1 Serial DTE Interface Operation 2.1.1 Automatic Speed/Format Sensing Command Mode and Data Mode. The modem can automatically determine the speed and format of the data sent from the DTE. The modem can sense speeds of 300, 600, ...

Page 22

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 2.2 Parallel Host Bus Interface Operation Command Mode and Data Mode. The modem can operate at rates up to 230.4 kbps by programming the Divisor Latch in the parallel interface registers if supported by communications software and/or driver. ...

Page 23

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 2.3.7 Billing Protection When the modem goes off-hook to answer an incoming call, both transmission and reception of data are prevented for 2 seconds (data modem seconds (fax adaptive answer) to allow transmission of the billing tone signal. ...

Page 24

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 2.4 Data Mode The modem enters data mode when a telephone line connection has been established between modems and all handshaking has been completed. 2.4.1 Speed Buffering (Normal Mode) Speed buffering allows a DTE to send data to, and receive data from, a modem at a speed different than the line speed ...

Page 25

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 2.4.7 Retrain The modem may lose synchronization with the received line signal under poor or changing line conditions. If this occurs, retraining may be initiated to attempt recovery depending on the type of connection. The modem initiates a retrain if line quality becomes unacceptable if enabled by the %E command ...

Page 26

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 2.5.2 Quick Connect The quick connect function enables the modem to shorten the connect time of subsequent calls to a server supporting quick connect. The quick connect feature is supported by the +PQC command. 2.5.3 PCM Upstream PCM upstream boosts the upstream data rates between the user and ISP to reduce upload times for large files and email attachments ...

Page 27

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 2.6.5 MNP 5 Data Compression MNP 5 data compression mode, enabled by the %Cn command, operates during an MNP connection. In MNP 5, the modem increases its throughput by compressing data into tokens before transmitting it to the remote modem, and by decompressing encoded received data before sending it to the DTE ...

Page 28

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 2.7.3 Remote Hangup Detection The Remote Hangup Detection feature will cause the modem to go back on-hook and respond with the message “LINE REVERSAL DETECTED” during a data connection when the remote modem is disconnected for abnormal termination reasons (remote phone line unplugged, remote server/modem shutdown) ...

Page 29

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Received analog mono audio samples are converted to digital form and formatted into 8- bit unsigned linear PCM format for reading by the host. AT commands control the bit length and sampling rate. Concurrent DTMF/tone detection is available at the 8 kHz sample rate ...

Page 30

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 2.12 Full-Duplex Speakerphone (FDSP) Mode (S Models) The modem operates in FDSP mode when +FCLASS=8 and +VSP=1 (Section 2.10.7). In FDSP Mode, speech from a microphone or handset is converted to digital form, shaped, and output to the telephone line through the line interface circuit. Speech received from the telephone line is shaped, converted to analog form, and output to the speaker or handset ...

Page 31

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet • Blacklist parameters. The modem can operate in accordance with requirements of individual countries to prevent misuse of the network by limiting repeated calls to the same number when previous call attempts have failed. Call failure can be ...

Page 32

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 2-1. TMIND# Test Results Pulse Cycles Internal RAM Fails Pulse Cycle 0 Modem Device Fails 0 2.16 Low Power Sleep Mode Sleep Mode Entry. The modem enters the low power sleep mode when no line connection exists and no host activity occurs for the period of time specified in the S24 register ...

Page 33

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3. Hardware Interface 3.1 CX81801 Modem Hardware Pins and Signals 3.1.1 Common to Parallel and Serial Interface Configurations 3.1.1.1 LSD Interface (Through DIB) The DIB interface signals are: • Clock and Power Positive (PWRCLKP); output • ...

Page 34

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3.1.1.5 External Bus Interface The external bus optionally connects to OEM-supplied external memory: • (512K x 8) ROM/flash ROM • (128K x 8) RAM The non-multiplexed external bus interface signals are: • ...

Page 35

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3.1.3 Parallel Interface Configuration Only (PARIF = High) A 16550A UART-compatible parallel host bus interface is selected when the PARIF input is high. 3.1.3.1 Parallel Host Bus Interface The parallel host interface signals are: • Host Reset control input line (RESET#) • ...

Page 36

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 3-1. CX81801 Modem Hardware Signals for Parallel Interface (PARIF = High) 114 XTLI CRYSTAL 115 CIRCUIT XTLO 113 CLKIN 61 NC CLKOUT 49 NC XCLK 111 NC DV1TP 240K 57 +3.3V LPO 47 NOXYCK 5 PARIF STPMODE# (PD3) 117 +3 ...

Page 37

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 3-2. CX81801 Modem 128-Pin LQFP Pin Signals for Parallel Interface (PARIF = High) 102247B CX81801 Parallel Interface (PARIF Pin = High) Conexant 102199_004 3-5 ...

Page 38

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-1. CX81801 Modem 128-Pin LQFP Pin Signals for Parallel Interface (PARIF = High) Pin Signal Label I/O I/O Type 1 HD5 (PC5) I/O Ith/Ot8 2 VDD P PWR 3 HD6 (PC6) I/O Ith/Ot8 4 HD7 (PC7) I/O Ith/Ot8 5 PARIF I Itpu 6 HA0 (PD0) ...

Page 39

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-1. CX81801 Modem 128-Pin LQFP Pin Signals for Parallel Interface (PARIF = High) (Continued) Pin Signal Label I/O I/O Type 47 NOXYCK I Itpu 48 GND G GND 49 XCLK O It/Ot2 50 IASLEEP (P_PF05) O Ot2 51 RESERVED I/O Itpu/Ot2 (P_PB01) 52 RESERVED (GP00) ...

Page 40

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) Label Pin XTLI, 114, XTLO 115 CLKIN 113 CLKOUT 61 DV1TP 111 PARIF 5 LINE_SEL (PE7) 23 STPMODE# (PD3) 9 NMI# 117 RESET# ...

Page 41

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) (Continued) Label Pin DSPKOUT 98 PWRCLKP 96 PWRCLKN 97 DIB_DATAP 93 DIB_DATAN 94 A0-A9, 71-77, 79-81, A10-A15, 84, 86-89, 91, A16 (PB0), 99, A17 (PB4), 105, A18 (PB5) 106 D0-D7 62-67, 69-70 READ# ...

Page 42

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) (Continued) Label Pin HCS# (PD4) 11 HWT# (PD5) 12 HRD# (PD6) 13 HINT (PB7) 109 HA0-HA2 6-8 (PD0-PD2) HD0-HD7 122-123, 125- (PC0-PC7) 127, 1, 3-4 ...

Page 43

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) (Continued) Label Pin VOICE# (PE1) 16 HS_LCS (PE4) 19 TESTP 110 XCLK 49 PHS2 121 SR4RIN 45 PA2 27 PA6 32 PD7 46 P_PX00 41 P_PX02 42 P_PX03 ...

Page 44

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 3-3. CX81801 Modem Hardware Signals for Serial Interface (PARIF = Low) 114 XTLI CRYSTAL 115 CIRCUIT XTLO 113 CLKIN 61 NC CLKOUT 49 NC XCLK 111 NC DV1TP 240K 57 +3.3V LPO 47 NOXYCK 5 PARIF 9 NC STPMODE# (PD3) 117 +3 ...

Page 45

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 3-4. CX81801 Modem 128-Pin LQFP Pin Signals for Serial Interface (PARIF = Low) 102247B CX81801 Serial Interface (PARIF Pin = Low) Conexant 102199_006 3-13 ...

Page 46

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-3. CX81801 Modem 128-Pin LQFP Pin Signals for Serial Interface (PARIF = Low) Pin Signal Label I/O I/O Type 1 RI# (PC5) O Ith/Ot8 2 VDD P PWR 3 TM# (PC6) O Ith/Ot8 4 RESERVED (PC7) I Ith/Ot8 5 PARIF I Itpu 6 DTRIND# (PD0) ...

Page 47

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-3. CX81801 Modem 128-Pin LQFP Pin Signals for Serial Interface (PARIF = Low) (Continued) Pin Signal Label I/O I/O Type 47 NOXYCK I Itpu 48 GND G GND 49 XCLK O It/Ot2 50 IASLEEP (P_PF05) O Ot2 51 RXCLK# (P_PB01) O Itpu/Ot2 52 XTCLK# (GP00) ...

Page 48

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low) Label Pin XTLI, 114, XTLO 115 CLKIN 113 CLKOUT 61 DV1TP 111 PARIF 5 LINE_SEL (PE7) 23 STPMODE# (PD3) 9 NMI# 117 RESET# ...

Page 49

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low) (Continued) Label Pin DSPKOUT 98 PWRCLKP 96 PWRCLKN 97 DIB_DATAP 93 DIB_DATAN 94 A0-A9, 71-77, 79-81, A10-A15, 84, 86-89, 91, A16 (PB0), 99, A17 (PB4), 105, A18 (PB5) 106 D0-D7 62-67, 69-70 READ# ...

Page 50

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low) (Continued) Label Pin TXD# (PA2) 27 RXD# (PA6) 32 CTS# (PC1) 123 DSR# (PC0) 122 RLSD# (PC2) 125 TM# (PC6) 3 RI# (PC5) ...

Page 51

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low) (Continued) Label Pin V.24 (EIA/TIA-232-E) DTE Serial Interface (Continued) RXCLK# (P_PB01) 51 TXCLK# (P_PA04) 54 XTCLK# (GP00) 52 AAIND# (PC4) 127 TMIND# (PB7) ...

Page 52

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low) (Continued) Label Pin VOICE# (PE1) 16 HS_LCS (PE4) 19 TESTP 110 XCLK 49 S4RIN 45 PHS2 121 PC3 126 PD1 7 PD2 8 PD7 46 P_PX00 ...

Page 53

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-5. CX81801 Modem I/O Type Definitions I/O Type Idd/Odd Digital input/output, DIB data transceiver Ix/Ox I/O, wire It/Ot2 Digital input, +5V tolerant/ Digital output, 2 mA, Z INT = 120 Ω Itk/Ot2 Digital input, +5V tolerant, keeper/ Digital output, 2 mA, Z INT = 120 Ω ...

Page 54

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3.2 CX20493 LSD Hardware Pins and Signals 3.2.1 CX20493 LSD Signal Summary 3.2.1.1 CX81801 Interface (Through DIB) The DIB interface, power, and ground signals are: • Clock (CLK, pin 29); input • Digital Power (PWR+, pin 8); unregulated input power • ...

Page 55

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3.2.1.4 General Purpose Input/Output There is one unassigned general purpose input/output pin: • General Purpose Input/Output 1 (GPIO1, pin 32); input/output 3.2.1.5 No Connects There is one No Connect pin: • No Connect (NC, pin 17); no internal connection 3.2.2 CX20493 LSD Pin Assignments and Signal Definitions CX20493 LSD hardware interface signals are shown by major interface in Figure 3-5, are shown by pin number in Figure 3-6, and are listed by pin number in Table 3-7 ...

Page 56

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 3-6. CX20493 LSD 32-Pin LQFP Pin Signals Table 3-7. CX20493 LSD 32-Pin LQFP Pin Signals Pin 3-24 CX20493 Signal Label DC_GND 17 AVdd 18 AVdd 19 Vc ...

Page 57

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-8. CX20493 LSD Pin Signal Definitions Label Pin I/O AVdd 2, 3 PWR AGnd 7 AGND_LSD VRef 5 REF Vc 4 REF PWR+ 8 PWR DVdd 28 PWR DGnd 26, 27 DGND_LSD CLK 29 I DIB_P 30 I/O DIB_N 31 I/O 102247B I/O Type ...

Page 58

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-8. CX20493 LSD Pin Signal Definitions (Continued) Label Pin I/O RAC1 24 I TAC1 23 I RAC2 22 I TAC2 21 I EIC 12 O TRDC 13 I EIO 20 O DC_GND 1, 9, GND 16, 18, 25 EIF 19 I RXI ...

Page 59

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-9. CX20493 LSD GPIO DC Electrical Characteristics Parameter Input Voltage Input Voltage Low Input Voltage High Output Voltage Low Output Voltage High Input Leakage Current Output Leakage Current (High Impedance) GPIO Output Sink Current at 0.33 V maximum GPIO Output Source Current at 2 ...

Page 60

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3.3 CX20442 VC Hardware Pins and Signals (S Models) 3.3.1 CX20442 VC Signal Summary Microphone and analog speaker interface signals, as well as telephone handset/headset interface signals are provided to support functions such as speakerphone mode, telephone emulation, microphone voice record, speaker voice playback, and call progress monitor. ...

Page 61

... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3.3.2 CX20442 VC Pin Assignments and Signal Definitions VC hardware interface signals are shown by major interface in Figure 3-7, are shown by pin number in Figure 3-8, and are listed by pin number in Table 3-11. VC hardware interface signals are defined in Table 3-12. ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 3-7. CX20442 VC Hardware Interface Signals 1 IASLEEP 4 DRESET# 19 M_CLK 21 V_SCLK 23 CX81801 V_STROBE 20 V_TXSIN 22 V_RXOUT 18 V_CTRL 17 +3. VAA (+3.3V GND 6 27 AGND Figure 3-8. CX20442 VC 32-Pin LQFP Pin Signals 3-30 M_DIG_SPEAKER SLEEP M_MIC_IN POR ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-11. CX20442 VC 32-Pin LQFP Pin Signals Pin Signal Label I/O 1 SLEEP I 2 M_DIG_SPEAKER O 3 M_SPKR_OUT O 4 POR I 5 MAVDD P 6 MAVSS M_LINE_OUTP O 10 M_LINE_OUTM O 11 VREF M_MIC_IN ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-12. CX20442 VC Pin Signal Definitions Label Pin VDD 17, 25 MAVDD 5 VSS 28 MAVSS 6 VSUB 27 POR 4 SET3V_BAR2 26 SLEEP 1 M_CLKIN 19 M_SCK 21 M_CNTRL_SIN 18 M_STROBE 23 M_TXSIN 20 M_RXOUT 22 M_MIC_IN 13 M_SPKR_OUT 3 M_LINE_OUTP 9 M_LINE_IN 14 3-32 I/O I/O Type System Signals P PWR Digital Power Supply ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-15. CX20442 VC Pin Signal Definitions (Continued) Label Pin VREF M_DIG_SPEAKER 2 M_LINE_OUTM 10 M_RELAYA 24 M_RELAYB 16 M_MIC_BIAS 15 M_ACT90 29 M_1BIT_OUT 30 D_LPBK_BAR Notes: 1. I/O types*: Ia Analog input It Digital input, TTL-compatible Digital input, TTL-compatible, internal 75k ± 25k Ω pull-down Itpd Digital input, TTL-compatible, internal 75k ± ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-14. CX20442 VC Analog Electrical Characteristics Signal Name Type M_LINE_IN, I (DA) M_MIC_IN M_LINE_OUTP O (DD) M_SPKR_OUT O (DF) Test Conditions unless otherwise stated: VDD = +3.3 ± 0.3 VDC; MAVDD = +3.3 ± 0.3 VDC 0°C to 70°C Parameter DAC to Line Driver output (600Ω ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3.4 Electrical and Environmental Specifications 3.4.1 Operating Conditions, Absolute Maximum Ratings, and Power Requirements The operating conditions are specified in Table 3-15. The absolute maximum ratings are listed in Table 3-16. The current and power requirements are listed in Table 3-17. ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 3-17. Current and Power Requirements Mode CX81801 Modem and CX20493 LSD Normal Mode: Off-hook, normal data connection Normal Mode: On-hook, idle, waiting for ring Sleep Mode CX20442 VC (Optional) Normal Mode Notes: 1 ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3.4.2 Interface and Timing Waveforms 3.4.2.1 External Memory Bus Timing The external memory bus timing is listed in Table 3-18 and illustrated in Figure 3-9. Table 3-18. Timing - External Memory Bus Symbol Parameter t Internal Operating Frequency FI t Internal Operating Clock Cycle ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 3-9. Waveforms - External Memory Bus C2* A[18:0] ES#** READ# D[7: Internal Phase 2 clock. ** ES# = RAMSEL# or ROMSEL#. C2* A[18:0] ES#** WRITE# D[7: Internal Phase 2 clock. ** ES# = RAMSEL# or ROMSEL#. 3-38 t CYC RDS Read Timing t CYC ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3.4.2.2 Parallel Host Bus Timing The parallel host bus timing is listed in Table 3-19 and illustrated in Figure 3-10. Table 3-19. Timing - Parallel Host Bus Symbol Parameter t Address Setup AS t Address Hold AH t Chip Select Setup ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 3-10. Waveforms - Parallel Host Bus HA[2-0] HCS# HRD# HWT# HD[7-0] HA[2-0] HCS# HRD# HWT# HD[7-0] 3- DRH a. Host Read DWH Host Write Conexant ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3.4.2.3 Serial DTE Interface The serial DTE interface waveforms for 4800 and 9600 bps are illustrated in Figure 3-11. Figure 3-11. Waveforms - Serial DTE Interface TXCLK 4800 BPS TXD 4800 BPS TXCLK 9600 BPS ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 3.5 Crystal Specifications Crystal specifications are listed in Table 3-20. Table 3-20. Crystal Specifications Frequency Calibration Tolerance Frequency Stability vs. Temperature Frequency Stability vs. Aging Oscillation Mode Calibration Mode Load Capacitance, C Shunt Capacitance, C Series Resistance, R Drive Level ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 4. Package Dimensions The 128-pin LQFP package dimensions are shown in Figure 4-1. The 32-pin LQFP package dimensions are shown in Figure 4-2. 102247B Conexant 4-1 ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 4-1. Package Dimensions - 128-Pin LQFP PIN 1 REF DETAIL A 4 DETAIL Coplanarity Ref: 128-PIN LQFP (GP00-D264 Metric values (millimeters) should be used for PCB layout ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Figure 4-2. Package Dimensions - 32-Pin LQFP D D2 PIN 1 REF DETAIL A 102247B D1 DETAIL A Dim Coplanarity * Metric values (millimeters) should be used for PCB layout. English values (inches) are ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 4-4 This page is intentionally blank. Conexant 102247B ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 5. Parallel Host Interface The modem supports a 16550A interface in parallel interface versions. The 16550A interface can operate in FIFO mode or non-FIFO mode. Non-FIFO mode is the same as 16450 interface operation. FIFO mode unique operations are identified. ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Table 5-1. Parallel Interface Registers Register Register No. Name 7 Scratch Register (SCR) 6 Modem Status Register (MSR) Data Carrier 5 Line Status Register (LSR) RX FIFO 4 Modem Control Register (MCR) 3 Line Control Register (LCR) Divisor Latch ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 5.2 Register Signal Definitions 5.2.1 IER - Interrupt Enable Register (Addr = 1, DLAB = 0) The IER enables five types of interrupts that can separately assert the HINT output signal (Table 5-2). A selected interrupt can be enabled by setting the corresponding enable bit disabled by setting the corresponding enable bit ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 5.2.2 FCR - FIFO Control Register (Addr = 2, Write Only) The FCR is a write-only register used to enable FIFO mode, clear the RX FIFO and TX FIFO, enable DMA mode, and set the RX FIFO trigger level. ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 5.2.3 IIR - Interrupt Identifier Register (Addr = 2) The Interrupt Identifier Register (IIR) identifies the existence and type five prioritized pending interrupts. Four priority levels are set to assist interrupt processing in the host. The four levels, in order of decreasing priority, are: Highest: Receiver Line Status, 2: Receiver Data Available or Receiver Character Timeout Buffer Empty, and 4: Modem Status ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 5.2.4 LCR - Line Control Register (Addr = 3) The Line Control Register (LCR) specifies the format of the asynchronous data communications exchange. Bit 7 This bit must be set access the Divisor latch registers during a read or write operation ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 5.2.5 MCR - Modem Control Register (Addr = 4) The Modem Control Register (MCR) controls the interface with the modem or data set. Bit 7-5 Always 0. Bit 4 When this bit is set the diagnostic mode is selected and the following occurs: Data written to the Transmit Buffer is looped back to the Receiver Buffer ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet Bit 5 This bit, when set, indicates that the TX Buffer is empty and the modem can accept a new character for transmission. In addition, this bit causes the modem to issue an interrupt to the host when the Transmit Holding Register Empty Interrupt Enable bit (IIR1) is set to 1 ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 5.2.7 MSR - Modem Status Register (Addr = 6) The Modem Status Register (MSR) reports current state and change information of the modem. Bits 4-7 supply current state and bits 0-3 supply change information. The change bits are set whenever a control input from the modem changes state from the last MSR read by the host ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 5.2.10 Divisor Registers (Addr = 0 and 1, DLAB = 1) The Divisor Latch LS (least significant byte) and Divisor Latch MS (most significant byte) are two read-write registers at locations 0 and 1 when DLAB = 1, respectively. The baud rate is selected by loading each divisor latch with the appropriate hex value. ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 5.3.2 Receiver Character Timeout Interrupts When the FIFO mode is enabled (FCR0 = 1) and receiver interrupt (Receiver Data Available) is enabled (IER0 = 1), receiver character timeout interrupt operation is as follows Receiver character timeout interrupt code (IIR0-IIR3 = Ch) is set if at least one ...

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... CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet 5-12 This page is intentionally blank. Conexant 102247B ...

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NOTES ...

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General Information: U.S. and Canada: (800) 854-8099 International: (949) 483-6996 Headquarters – Newport Beach 4000 MacArthur Blvd. Newport Beach, CA 92660 ...

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