RC224ATL Conexant Systems, Inc., RC224ATL Datasheet

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RC224ATL

Manufacturer Part Number
RC224ATL
Description
Embedded modem family
Manufacturer
Conexant Systems, Inc.
Datasheet

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RC224ATL/224ATLV
EmbeddedModem Family
The new Conexant RC224ATL utilizes a new integrated data pump/controller to allow
the device to directly connect to host processors that are 3.3 V I/O capable. The codec
used in the new part is the same as the codec used in the existing RC224ATL. The
new device is form, fit, and function compatible with the existing device. This means
there are no hardware and software differences between the existing and the new part,
with one exception. The 3.3 V I/O capable part incorporates 3.3 V compatible digital
I/O buffers, hence requiring 3.3 V digital supply instead of 5 V digital supply.
data and fax capabilities.
transmit and receive up to 2400 bps.
Group 3 transmit and receive functions.
Functional Block Diagram
Data Sheet
In addition, unlike the current version of RC224ATL, the new part provides both
Data modes, controlled by an industry standard 2400 AT command set, can
Fax modes, controlled by a built-in EIA-578 Class 1 command interface, provide
EIA-232-D
Interface
V.24
Data Pump
Controller
Modem
Modem
Crystal
Telephone
Interface
Indictors
Optional
Optional
Speaker
Modem
NVRAM
LED
Line
Distinguishing Features
• Data modes
• Group 3 fax modes
• EIA-578 Service Class 1 commands
• V.42/MNP2-4 and V.42 bis/MNP 5
• Data/fax discriminator and auto
• Communications software
• Integrated call progress and dialing
• No external microcomputer or
• Parallel or serial asynchronous DTE
• A/A1 relay control
• NVRAM interface allows storage of
• Automatic adaptive/fixed
• Programmable sleep mode and
• Full-duplex data mode test
• Half-duplex fax mode test capabilities
• Automatic format/speed sensing
• Low power consumption (typical)
• Single +5 V power supply or Dual
• Package options:
– CCITT V.22 bis (2400 bps), V.22
– Bell 212A (1200 bps) and 103
– Enhanced AT commands
– V.29 (9600/7200 bps) transmit
– V.27 ter (4800/2400 bps)
– V.21 Channel 2 (300 bps)
can be supported through host
software without additional hardware
answering
compatible
memory required
interface
two user configurations and four
36-digit dial strings
compromise equalization
wake-up
capabilities: Analog loop, local digital
loop, and remote digital loop
– Operating: 100 mW
– Sleep—Idle: 25 mW
– Sleep—Stop: 5 mW
+ 3.3 VDD and + 5 VAA power
supplies
– 68-pin plastic leaded chip carrier
– 100-pin plastic quad flat pack
(1200 bps)
(300 bps)
transmit and receive
transmit and receive
(PLCC)
(PQFP)
March 25, 1999
D224ATLVDSC

Related parts for RC224ATL

RC224ATL Summary of contents

Page 1

... The new Conexant RC224ATL utilizes a new integrated data pump/controller to allow the device to directly connect to host processors that are 3.3 V I/O capable. The codec used in the new part is the same as the codec used in the existing RC224ATL. The new device is form, fit, and function compatible with the existing device. This means there are no hardware and software differences between the existing and the new part, with one exception ...

Page 2

... L2531 3V Package 68 PLCC RC224ATL/V (R6641-14), RC224ATL (R6641-15), RC224ATL/VN (R6641-16), RC224ATLN (R6641-17), RC224ATL/VE (R6641-24), RC224ATLE (R6641-25) 100 PQFP RC224ATL/V (R6641-18), RC224ATL (R6641-19), RC224ATL/VN (R6641-20), RC224ATLN (R6641-21), RC224ATL/VE (R6641-26), RC224ATLE (R6641-27) 68 PLCC RC224ATL/VN (R6641-36), RC224ATL/V (R6641-37), RC224ATLN (R6641-38), RC224ATL (R6641-39) 100 PQFP RC224ATL/VN (R6641-40), RC224ATATL/V ...

Page 3

Table of Contents List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

... Call Progress Algorithms 6-12 6.5.1 Ring Detection 6-13 6.5.2 7.0 Electrical/Mechanical Specifications 7.1 Interfacing the RC224ATLV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 7.2 Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 Interface Timing and Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 7.3 Appendix A: RC224ATF Modem Designs 68-Pin PLCC Design for Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 A.1 68-Pin PLCC Design for Parallel Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6 A ...

Page 5

... EmbeddedModem Family List of Figures Figure 2-1. RC224ATLV Signals—Parallel Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Figure 2-2. RC224ATLV Signals—Serial Interface 2-3 Figure 3-1. 68-Pin PLCC Package—Serial 3-1 Figure 3-2. 68-Pin PLCC Package—Parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Figure 3-3. 100-Pin PQFP Package—Serial 3-3 Figure 3-4. ...

Page 6

Conexant EmbeddedModem Family D224ATLVDSC ...

Page 7

... Programmable Baud Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 Table 3-1. RC224ATL/224ATLV 68-Pin PLCC Pin Assignments—Serial Mode . . . . . . . . . . . . . . . . . . . 3-5 Table 3-2. RC224ATLV 68-Pin PLCC Pin Assignments—Parallel Mode 3-6 Table 3-3. RC224ATL/224ATLV 100-Pin PQFP Pin Assignments—Serial . . . . . . . . . . . . . . . . . . . . . . . 3-7 Table 3-4. RC224ATL/224ATLV 100-Pin PQFP Pin Assignments—Parallel . . . . . . . . . . . . . . . . . . . . . 3-11 Table 3-5 ...

Page 8

Conexant EmbeddedModem Family D224ATLVDSC ...

Page 9

... Overview The Conexant RC224ATLV is a combination V .22 bis data and Group 3 fax CMOS modem in a single VLSI package and is identical to the RC224ATLV . The RC224ATLV integrated data/fax modem is available in either a 68-pin plastic leaded chip carrier (PLCC 100-pin plastic quad flat pack (PQFP). ...

Page 10

Technical Specifications 1.2.2 Configurations and Rates The supported modem configurations and signaling rates are listed in In data modes with serial interface selected, DTE rate offsets of + 1%, – 2.5% are accommodated by adding/deleting stop bits as required. ...

Page 11

EmbeddedModem Family 1.2.3 Operation Modem operation is controlled by AT commands, fax service class 1 commands, and supporting S registers. 1.2.3.1 Data Modes Data rate selection is determined by the speed of the originating and answering modems, as defined in ...

Page 12

Technical Specifications 1.2.8 Transmit Level The transmit level is – 10 dBm using the circuits shown in Appendix A. Carrier and dual tone multi-frequency (DTMF) transmit levels can be further attenuated using AT%Ln + AT%Dn commands, respectively ...

Page 13

... Table 1-3. Dial Digits/Tone Pairs ( 1.2.12 Low Power Sleep Mode To conserve power, the RC224ATLV has two selectable sleep (power-down) modes – Idle and Stop. If enabled by the IDLEN0 and IDLN1 inputs, the selective sleep mode is entered whenever the modem is active. The sleep mode indicator output, SLEEP, is provided to allow external circuits to be powered down when the modem is in Idle or Stop mode ...

Page 14

Technical Specifications Entry The modem will enter 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. All EmbeddedModem circuits are turned off except the ...

Page 15

... Hardware Interface Figure 2-1 for the parallel and serial interfaces, respectively. The RC224ATLV hardware interface signals are described in Table 3-5, Hardware Interface Signal See timing parameters and interface waveforms. D224ATLVDSC 2 and Figure 2-2 illustrate the RC224ATLV hardware interface signals Definitions. ...

Page 16

... Figure 2-1. RC224ATLV Signals—Parallel Interface XTLI Crystal XTLO HDIS HCS HRD HWT HINT HA0 HA1 HA2 HD0 Host HD1 Computer HD2 Parallel BUS HD3 HD4 HD5 HD6 HD7 RESET 2-2 TLKRELAY OHRELAY TXAI TXA2 RXA RFILO AGCIN SPKR RC224ATL RC224ATLV ...

Page 17

... EmbeddedModem Family Figure 2-2. RC224ATLV Signals—Serial Interface XTLI Crystal XTLO AAE MR LED DCDL Indicators DTRL RXD CI/HS DCD DSR V.24 EIA-232-D RI Interface CTS TXD DTR +5 V RESET SEREN D224ATLVDSC TLKRELAY OHRELAY TXAI TXA2 RXA RFILO AGCIN SPKR RC224ATL RC224ATLV MODEM ...

Page 18

The parallel interface registers are identified in Table 2-1. Parallel Interface Registers ( Register Register Number Name 7 7 Scratch Register (SCR) 6 Modem Data Status Carrier Register Detect (MSR) (DCD) 5 Line Status 0 Register (LSR) 4 ...

Page 19

EmbeddedModem Family Table 2-1. Parallel Interface Registers ( Register Register Number Name 7 1 Divisor DLAB = 1 Latch MSB Register (DLM) 0 Divisor DLAB = 1 Latch LSB Register (DLL) D224ATLVDSC Bit Number ...

Page 20

Hardware Interface 2.1 Hardware Interface 2.1.1 Parallel Interface A 16450 UART-compatible parallel interface is provided. Host Bus Interface Eight data lines, three address lines, and four control lines are supported. Interrupt Enable Register The Interrupt Enable Register (IER) enables ...

Page 21

EmbeddedModem Family Interrupt Identifier The Interrupt Identifier Register (IIR) identifies the existence and type of Register (Addr = 2) prioritized pending interrupts. Four priority levels are set to assist interrupt processing in the host. When addressed during chip-select time, the ...

Page 22

Hardware Interface Line Control Register The Line Control Register (LCR) specifies the format of the asynchronous data (Addr = 3) communications exchange DLAB SB SP DLAB SB SP EPS PEN STB WLS0 and WLS1 Word Length Select. ...

Page 23

EmbeddedModem Family Modem Control Register The Modem Control Register (MCR) controls the interface with the modem or (Addr = 4) data set Bit 5-7: LL OUT2 OUT1 RTS DTR D224ATLVDSC OUT2 ...

Page 24

Hardware Interface Line Status Register The LSR, an 8-bit register, provides status information to the host concerning data (Addr = 5) transfer TEMT THRE Bit 7: TEMT THRE 2- ...

Page 25

EmbeddedModem Family Modem Status Register The Modem Status Register (MSR) reports the modem’s current state and change (Addr = 6) information. Bits 4-7 supply current state, and bits 0-3 supply change information. The change bits are set to a logic ...

Page 26

... The EmbeddedModem provides three relay control outputs to the line interface. These outputs may be used to control relays such as off-hook, A/A1, and talk/data. 2.2 Additional Information Additional information is provided in the RC224ATLV Modem Designer’s Guide (Order No. 821). 2-12 Table 2-2 lists the programmable values corresponding to the desired Table 2-2 ...

Page 27

... Pin Descriptions The RC224ATLV 68-pin PLCC serial and parallel pinouts are displayed in Figure 3-1 pinout diagrams are displayed in Figure 3-5 RC224ATLV 68-pin PLCC serial and parallel pin assignments are displayed in Table 3-1 assignments are displayed in Figure 3-1. 68-Pin PLCC Package Serial — ...

Page 28

Figure 3-2. 68-Pin PLCC Package Parallel — HA1 10 HA0 11 IDLEN0 12 NVRSK 13 RESET 14 VCC 15 HINT 16 HDIS NVRDIO IDLEN1 21 RAGCO 22 RADCI 23 TSTBO 24 RSTBO 25 RRSTO ...

Page 29

EmbeddedModem Family Figure 3-3. 100-Pin PQFP Package — DTR 1 IDLEN1 2 RAGCO 3 RADCI 4 TSTBO RSTBO 9 RRSTO 10 TRSTO 11 MODEO 12 TDACO 13 SLEEP DGND 16 ...

Page 30

Figure 3-4. 100-Pin PQFP Package — IDLEN1 2 RAGCO 3 RADCI 4 TSTBO RSTBO 9 RRSTO 10 TRSTO 11 MODEO 12 TDACO 13 SLEEP DGND 16 MODEI 17 ...

Page 31

... EmbeddedModem Family Table 3-1. RC224ATL/224ATLV 68-Pin PLCC Pin Assignments Pin Signal Label Number 1 DCDL 2 IDLEN0 3 RING SEREN 6 WAKEUP 7 NVRCS 8 NVRDIO 9 A/A1 10 AAE 11 DTRL RXD 14 RESET 15 VCC 16 NVRSK TXD 20 DTR 21 IDLEN1 22 RAGCO 23 RADCI 24 TSTBO 25 RSTBO 26 RRSTO 27 TRSTO 28 MODEO 29 TDACO TXA2 32 TXA1 33 RXA ...

Page 32

... Table 3-2. RC224ATLV 68-Pin PLCC Pin Assignments Pin Signal Label Number 1 HD6 2 HD7 3 RING 4 HRD 5 HWT 6 HCS 7 NVRCS 8 HA2 9 A/A1 10 HA1 11 HA0 12 IDLEN0 13 NVRSK 14 RESET 15 VCC 16 HINT 17 HDIS NVRDIO IDLEN1 22 RAGCO 23 RADCI 24 TSTBO 25 RSTBO 26 RRSTO 27 TRSTO 28 MODEO 29 TDACO TXA2 32 TXA1 33 RXA ...

Page 33

... EmbeddedModem Family Table 3-3. RC224ATL/224ATLV 100-Pin PQFP Pin Assignments NOTE(S): (1) (2) (3) (4) (5) (6) D224ATLVDSC Pin Number Signal Label 1 DTR 2 IDLEN1 3 RAGCO 4 RADCI 5 TSTBO 6 ( RSTBO 10 RRSTO 11 TRSTO 12 MODEO 13 TDACO 14 SLEEP DGND 17 MODEI 18 VAA 19 SPKR AGND 22 TXA2 23 TXA1 RXA RFILO I/O Types are described in ...

Page 34

... Table 3-3. RC224ATL/224ATLV 100-Pin PQFP Pin Assignments NOTE(S): (1) (2) (3) (4) (5) (6) 3-8 Pin Number Signal Label 28 AGCIN AGND TLKRELAY 37 AGND 38 OHRELAY SLEEPI 42 RAGCI 43 AGND 44 RSTBI 45 RRSTI 46 RADCO 47 TDACI 48 TRSTI 49 TSTBI TEST 54 XTLI I/O Types are described in Figure 7-5, Digital Interface Characteristics Figure 7-6, Analog Interface Characteristics ...

Page 35

... EmbeddedModem Family Table 3-3. RC224ATL/224ATLV 100-Pin PQFP Pin Assignments NOTE(S): (1) (2) (3) (4) (5) (6) D224ATLVDSC Pin Number Signal Label 55 XTLO DGND 58 DGND DSR 62 CTS 63 DCD 64 CI/HS 65 NMI 66 DGND DCDL 71 IDLENO 72 RING SEREN 76 WAKEUP 77 NVRCS 78 NVRDIO 79 (A/A1) 80 DGND 81 DGND I/O Types are described in ...

Page 36

... Table 3-3. RC224ATL/224ATLV 100-Pin PQFP Pin Assignments NOTE(S): (1) (2) (3) (4) (5) (6) 3-10 Pin Number Signal Label AAE 84 DTRL RXD 87 RESET 88 VCC 89 VCC NVRSK TXD DGND 100 NC I/O Types are described in Figure 7-5, Digital Interface Characteristics Figure 7-6, Analog Interface Characteristics Modem Interconnection external connection (may have internal connection, leave pin disconnected (open)) ...

Page 37

... EmbeddedModem Family Table 3-4. RC224ATL/224ATLV 100-Pin PQFP Pin Assignments—Parallel ( NOTE(S): (1) (2) (3) (4) (5) (6) D224ATLVDSC Pin Number Signal Label IDLEN1 3 RAGCO 4 RADCI 5 TSTBO 6 ( RSTBO 10 RRSTO 11 TRSTO 12 MODEO 13 TDACO 14 SLEEP DGND 17 MODEI 18 VAA 19 SPKR AGND 22 TXA2 23 TXA1 RXA 26 NC I/O Types are described in ...

Page 38

... Table 3-4. RC224ATL/224ATLV 100-Pin PQFP Pin Assignments—Parallel ( NOTE(S): (1) (2) (3) (4) (5) (6) 3-12 Pin Number Signal Label 27 RFILO 28 AGCIN AGND TLKRELAY 37 AGND 38 OHRELAY SLEEPI 42 RAGCI 43 AGND 44 RSTBI 45 RRSTI 46 RADCO 47 TDACI 48 TRSTI 49 TSTBI TEST I/O Types are described in Figure 7-5, Digital Interface Characteristics Figure 7-6, Analog Interface Characteristics ...

Page 39

... EmbeddedModem Family Table 3-4. RC224ATL/224ATLV 100-Pin PQFP Pin Assignments—Parallel ( NOTE(S): (1) (2) (3) (4) (5) (6) D224ATLVDSC Pin Number Signal Label 54 XTLI 55 XTLO DGND 58 DGND HD0 62 HD1 63 HD2 64 HD3 65 NMI 66 DGND HD4 69 HD5 70 HD6 71 HD7 72 RING HRD 75 HWT 76 HCS 77 NVRCS 78 HA2 79 (A/A1) 80 DGND ...

Page 40

... Table 3-4. RC224ATL/224ATLV 100-Pin PQFP Pin Assignments—Parallel ( NOTE(S): (1) (2) (3) (4) (5) (6) 3-14 Pin Number Signal Label 81 DGND HA1 84 HA0 85 IDLENO 86 NVRSK 87 RESET 88 VCC 89 VCC HINT 92 HDIS NVRDIO DGND 100 NC I/O Types are described in Figure 7-5, Digital Interface Characteristics Figure 7-6, Analog Interface Characteristics ...

Page 41

EmbeddedModem Family Table 3-5. Hardware Interface Signal Definitions ( Label I/O Type XTLI IE Crystal/Clock In and Crystal Out. The modem must be connected to an external crystal XTLO OE circuit consisting of a 16.000312 MHz crystal and ...

Page 42

Table 3-5. Hardware Interface Signal Definitions ( Label I/O Type WAKEUP DI Wake Up. For serial interfaces only, WAKEUP input low removes the modem from the sleep mode (if in the sleep mode), or prevents the modem from ...

Page 43

... Registers). Parallel interface operation is equivalent to 16C450 operation with CS0 and CS1 inputs high and DISTR, DOSTR, and ADS inputs low. The corresponding RC224ATLV and 16C450 signals are shown below. 16C450 signals that are not required for RC224ATLV host computer operation are not shown. ...

Page 44

Table 3-5. Hardware Interface Signal Definitions ( Label I/O Type HDIS DO Host Bus Driver Disable. HDIS output is low when the host is reading data from the modem over the host data bus (both HRD and HCS ...

Page 45

EmbeddedModem Family Table 3-5. Hardware Interface Signal Definitions ( Label I/O Type RFILO MI Receive Filter Output. RFILO is the output of the internal receive anti-aliasing filter which must be connected to AGCIN through a 0.1 µF, 20%, ...

Page 46

Figure 3-5. NVRAM Timing 3-20 (1) 4 µ S NVRSK t DIS t DIH 0.4 µ S 0.4 µ S NVRDI t CSS t DIS 0.2 µ S 0.4 µ S NVRCS t PDO 2 µ S NVRDO NOTE(S): (1) ...

Page 47

AT Commands Each command line must start with the AT prefix and be terminated with a carriage return (CR). Several commands may be included on one command line. A command line may contain characters, excluding the ...

Page 48

Table 4-2. AT Command Set Summary ( Command Function A/ Re-execute command A Answer a call AT Command line prefix Parameters: none Bn Select CCITT or Bell Mode Parameters 0,1 Cn Carrier control Parameters ...

Page 49

EmbeddedModem Family Table 4-2. AT Command Set Summary ( Command Function Sn Select S register as default Range 0- Parameters: none Range 0-27 (register no.) x=0-255 (value) Sn? Parameters: none Range: n ...

Page 50

Table 4-2. AT Command Set Summary ( Command Function &Dn DTR option &F Recall (restore) factory profile &Gn Select guard tone &Jn Telephone jack control &L0 Dial-up line operation &Mn Asynchronous mode &Pn Pulse dial make/break ratio &Q0 ...

Page 51

EmbeddedModem Family Table 4-2. AT Command Set Summary ( Command Function &Tn Test and diagnostic &V Display current configurations &Wn Store current configuration &X0 Asynchronous data transmission &Yn Select default profile & Store dial string to ...

Page 52

Table 4-2. AT Command Set Summary ( Command Function %Dn DTMF Level Attenuation %J Load Secondary Defaults %Ln Transmit Level Attenuation Function Dial Modifier P Pulse Dial Parameters: none R Originate Call in Answer Mode Parameters: none S=n ...

Page 53

EmbeddedModem Family Table 4-3. Fax Command Set Summary ( Fax Command Function +FCLASS=n Service class +F<command>? Report Active Configuration +F<command>=? Report Operating Capabilities +FAA=n Data/Fax Auto Answer +FF Enhanced Flow Control +FTS=n Stop Transmission and Wait +FRS=n Receive ...

Page 54

Table 4-3. Fax Command Set Summary ( Fax Command Function +FTM=n Transmit Data +FRM=n Receive Data +FTH=n Transmit Data with HDLC Framing +FRH=n Receive Data with HDLC Framing +FRTn Receive Test Data +FTTn = m Transmit Test Data ...

Page 55

S Registers The S register commands are summarized in values and the factory default value for each S register are also shown. The factory default values are used whenever the &F command is received or a parity error is ...

Page 56

Table 5-1. S Register Summary Register Range (1) 0–255 Rings S0 S1 0–255 Rings S2 0–127 ASCII S3 0–127 ASCII S4 0–127 ASCII S5 0–32, 127 ASCII S6 2–255 Seconds S7 1–255 Seconds S8 0–255 Seconds S9 1–255 1/10 seconds ...

Page 57

EmbeddedModem Family Table 5-2. S Register Description ( Register Default Range S0 00 0–255 S1 00 0–255 S2 43 0–127 – 127 127 – – 32, 127 S6 02 ...

Page 58

Table 5-2. S Register Description ( Register Default Range 255 – 255 – S10 14 1 255 – S11 95 50 255 – S12 50 0 – 255 S13 — — S14 ...

Page 59

EmbeddedModem Family Table 5-2. S Register Description ( Register Default Range S16 00 — S17 00 0-250 S18 00 0-255 S19 — — S20 0 1-127 D224ATLVDSC Units None Modem Test Option. Controls the diagnostic modes as follows: ...

Page 60

Table 5-2. S Register Description ( Register Default Range S21 00 Bit Mapped 5-6 Units Description — Bit Mapped Options. S21 is the modem register with the following bit functions: Bit 0 Telco Jack (See &J Command) 0 ...

Page 61

EmbeddedModem Family Table 5-2. S Register Description ( Register Default Range S22 76h Bit Mapped D224ATLVDSC Units Description — Bit Mapped Options. S22 is the modem register with the following bit functions: Bit 0, 1 Speaker Volume (See ...

Page 62

Table 5-2. S Register Description ( Register Default Range S23 07 Bit Mapped S24 00 0-255 S25 05 0-255 S26 01 0-255 5-8 Units — Bit Mapped Options. Bit 0 Obey request from remote modem for a Remote ...

Page 63

EmbeddedModem Family Table 5-2. S Register Description ( Register Default Range S27 40h Bit Mapped D224ATLVDSC Units Description — Bit Mapped Options. Bit 3, 1, 0Communications Mode Option (See &D Command &Q0 ...

Page 64

Table 5-2. S Register Description ( Register Default Range S28 00 Bit Mapped NOTE(S): (1) Bit 5 is set or reset if the dial command string contains a P (pulse dial (tone dial), respectively ...

Page 65

Operation Modem operation supports data modem processing, fax modem processing and common call progress processing. The AT+FCLASS command allows the operator to select either data or fax operation. AT+FCLASS=0 Data mode AT+FCLASS=1 Fax mode Class 1 6.1 Data Modes ...

Page 66

Data Modes 6.1.3 Call Origination Automatic and manual origination of calls is supported. Automatic call origination is supported by the ATDS command. The modem automatically enters the data handshaking mode upon completion of the dial function. 6.1.4 Call Answering ...

Page 67

EmbeddedModem Family 6.2 Fax Modes 6.2.1 Fax Mode Selection Fax modes and rates are determined by the AT+F commands and are defined in Chapter 4.0, AT 6.2.2 Fax Mode Processing Fax modem processing is explicitly defined in CCITT V .29, ...

Page 68

Fax Modes 6.2.5 Fax Data Transmission Fax data transmission is initiated by the +FTM command. Upon recognition of the command, the modem initiates the selected modulation mode and issues the CONNECT result code. The proper training sequence for the ...

Page 69

EmbeddedModem Family Each frame is checked to see if the current frame is the last frame of the transmission. If the final frame bit (5th received bit of the second byte of the frame indicating that the current ...

Page 70

Fax Modes Both transmit and receive data are buffered. Flow control using X-on/X-off (DC1/DC3) is provided. Unique control character strings are identified, filtered, or reinserted into the I/O data stream. These control characters and their resultant action are shown ...

Page 71

EmbeddedModem Family 6.3 Fax Enhanced Flow Control The fax Class 1 standard provides for bidirectional X-on/X-off flow control. However, in multitasking “windowing” environments, the DTE communication package can be suspended long enough to miss a 19,200 bps serial asynchronous character ...

Page 72

Data/Fax Auto Answering 6.3.3 DTE Flow Control Operation Normal operation: DTE does not miss character. The DTE reads the serial character sent by the DCE. The DTE checks serial hardware overrun status and determines that an overrun did not ...

Page 73

... The RC224ATLV accommodates this through the use of the data carrier detect (DCD) indicator. Initially, in auto answer mode DCD will be off. When connected in data mode, the DCE will turn DCD on ...

Page 74

Data/Fax Auto Answering Table 6-2. Terminal Called by a 1200 bps Data Modem DTE Command DCE Response — — AT&C1 OK ATS9=n OK AT+FAA=1 OK — — — RING ATA — — — — — — — — DATA ...

Page 75

EmbeddedModem Family Table 6-3. Terminal Called by a Fax Machine DTE Command DCE Response — — AT&C1 OK ATS9=n OK AT+FAA=1 OK — — — RING ATA — — — — FAX — — — CONNECT D224ATLVDSC Comments Assume DCE ...

Page 76

... Highband channel signals include 2100 and 2225 Hz signalling tones. Lowband channel signals include dial tones, busy tones, ringback tones and voice ranging in frequency from 120 to 620 Hz. Characteristics of the tones detected by the RC224ATLV are listed in Table Table 6-4. Tone Characteristics Dial Tone ...

Page 77

EmbeddedModem Family 6.5.2 Ring Detection Ring detection is based on a digital input to the modem. External circuitry not part of the modem is required to convert the analog 40 to 150 V a digital single-bit data stream representation. Valid ...

Page 78

Call Progress Table 6-5. Fax Class 1 Calling Sequence ( DTE Commands DCE Responses (Host) (Modem) — (30) OK, drop carrier (31) AT+FTS=8 (32) OK, wait 80 ms (33) AT+FTM=96 (34) Send F.29 — (35) CONNECT (36) ...

Page 79

EmbeddedModem Family Table 6-6. Fax Class 1 Answering Sequence ( DTE Commands DCE Responses (Host) (Modem) (1) AT+FCLASS=1 (2) OK (2b) AT+FRM=? 24,48 — OK — — — (4) RING (5) ATA (6) Modem answers — (7) Send ...

Page 80

Call Progress Table 6-6. Fax Class 1 Answering Sequence ( DTE Commands DCE Responses (Host) (Modem) (44) AT+FRM-48 — — — — (46) <page data> — (48) NO CARRIER (49) AT+FRH=3 (50) CONNECT — — — (52) ...

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... Electrical/Mechanical Specifications 7.1 Interfacing the RC224ATLV The RC224ATLV is not 5.0 V I/O logic tolerant recommended that a series resistor of 150 when interfacing to + 5.0 V logic output lines. The digital outputs of the RC224ATLV should not go to resistor pullups that are connected to the + 5 V power supply. These precautions will help prevent the modem chip from going into latchup due to raising any input or output pin level more than + 0 ...

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Interface Timing and Waveforms 7.3 Interface Timing and Waveforms Table 7-2 interface waveforms. Table 7-4 Table 7-2. Timing–Host Bus Interface Symbol 7-2 lists the host bus interface timing parameters. Table 7-3 lists the current and power requirements, and lists ...

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EmbeddedModem Family Figure 7-1. Timing Waveform D224ATLVDSC HA0-HA2 t AS HCS t CS HRD HWT HD0-HD7 DIS HDIS a. Host Read HA0-HA2 t AS HCS t CS HRD HWT HD0-HD7 HDIS b. Host Write Conexant 7.3 Interface ...

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Interface Timing and Waveforms Table 7-3. Current and Power Requirements Mode Typical Current @ 25°C Operating 20 mA Sleep - Idle 5 mA Sleep - Stop 1 mA NOTE(S): 1. Test conditions: VDD = 5.0 V for typical values; ...

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... Type OA Type OB Type OD Type OG Type OH Three-State (off) Current I TS NOTE(S): (1) RC224ATL Test Conditions RC224ATLV Test Conditions 3 Output loads one TTL. ( voltage between Tip and Ring, using the on-board modular DAA. RMS D224ATLVDSC lists digital interface characteristics, and Min. Typ. Max 2.0 — ...

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Interface Timing and Waveforms Table 7-6. Analog Interface Characteristics RXA TXA1, TXA2 SPKR NOTE(S): (1) Figure 7-2 dimensions. Figure 7-3 its dimensions. 7-6 Name Type I (DA) Input impedance — — Voltage range O (DD) Minimum load — — ...

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EmbeddedModem Family Figure 7-2. 68-Pin PLCC D224ATLVDSC INDEX CORNER TOP VIEW CHAM DEG CHAM DEG PLCS BOTTOM VIEW Conexant 7.3 Interface Timing and ...

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Interface Timing and Waveforms Table 7-7. 68-Pin PLCC Dimensions NOTE(S): 7-8 Millimeters Dim Min Max A 4.14 4.39 A1 1.37 1.47 A2 2.31 2.46 b 0.457 TYP D 25.02 25.27 D1 24.00 24.26 D2 20.19 20.45 D3 23.24 23.5 ...

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EmbeddedModem Family Figure 7-3. 100-Pin PQFP D224ATLVDSC D CHAM DEG. (4x PIN 1 REF TOP VIEW DETAIL A Conexant 7.3 Interface Timing and Waveforms See Detail A E1 SIDE ...

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Interface Timing and Waveforms Table 7-8. 100-Pin PQFP Dimensions NOTE(S): 7-10 Millimeters Dim Min Max A 1.95 2.05 A1 0.95 1.05 A2 0.15 0.25 D 22.96 23.44 D1 19.89 20.09 E 16.94 17.45 E1 13.89 14.10 K1 0.70 0.90 ...

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Appendix A: RC224ATF Modem Designs This appendix describes two modem design examples. The schematics and parts lists are provided for designs incorporating the RC224ATF packaged in a 68-pin PLCC and implemented with either a parallel or serial interface. A.1 68-Pin ...

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A.1 68-Pin PLCC Design for Serial Interface Figure A-1. Serial Interface Design Conexant EmbeddedModem Family D224ATLVDSC ...

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EmbeddedModem Family Figure A-2. Serial Interface Design DAA D224ATLVDSC A.1 68-Pin PLCC Design for Serial Interface Conexant A-3 ...

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A.1 68-Pin PLCC Design for Serial Interface Table A-1. Serial Bill of Materials ( A-4 Item Quantity Reference 1 2 C2, C7,C17 7 9 ...

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EmbeddedModem Family Table A-1. Serial Bill of Materials ( D224ATLVDSC Item Quantity Reference 30 1 R16 31 1 R17 Conexant ...

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A.2 68-Pin PLCC Design for Parallel Interface A.2 68-Pin PLCC Design for Parallel Interface Figure A-3 parallel interface board design. A-6 and Figure A-4 provide the schematic of a RC224ATF 68-pin PLCC Table A-2 lists the bill of materials for ...

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EmbeddedModem Family Figure A-3. Parallel Interface Design 2 1 D224ATLVDSC A.2 68-Pin PLCC Design for Parallel Interface Conexant A-7 ...

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A.2 68-Pin PLCC Design for Parallel Interface Figure A-4. Parallel Interface Design DAA A-8 Conexant EmbeddedModem Family D224ATLVDSC ...

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EmbeddedModem Family Table A-2. Parallel Billing Materials ( D224ATLVDSC Item Quantity 1 2 C2, C7,C17 7 8 C8,C10,C11,C12,C14,C15,C20, C21 ...

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A.2 68-Pin PLCC Design for Parallel Interface Table A-2. Parallel Billing Materials ( A-10 Item Quantity Conexant EmbeddedModem Family Reference ...

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Appendix B: Acronyms/Abbreviations D224ATLVDSC B A-B AGC Automatic Gain Control AT Attention Code C CCITT International Telegraph and Telephone Consultative Committee CRC Cyclic Redundancy Check CTS Clear to Send D DAC Digital-to-Analog Converter DCE Data Communication Equipment DTE Host Data ...

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B-2 M MCR Modem Control Register MCU Microcontroller Unit MSR Modem Status Register O-P OEM Original Equipment Manufacturer op amp operational amplifier PBX Private Branch Exchange R-S RBR Receiver Buffer Register RTS Request to Send (name of bit and function) ...

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... Phone: (852) 2827 0181 Fax: (852) 2827 6488 Web Site www.conexant.com India Phone: (91 11) 692 4780 Fax: (91 11) 692 4712 World Headquarters Conexant Systems, Inc. 4311 Jamboree Road Korea P. O. Box C Phone: (82 2) 565 2880 Newport Beach, CA Fax: (82 2) 565 1440 92658-8902 ...

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