cx20493-35/app Conexant Systems, Inc., cx20493-35/app Datasheet - Page 5

• Manufacturer Part Number: cx20493-35/app
• Description: With Cx20493 Smartdaa?
• Manufacturer: Conexant Systems, Inc.

3. Hardware Interface ...............................................................................................................................3-1
4. Package Dimensions ............................................................................................................................4-1
5. Parallel Host Interface ..........................................................................................................................5-1
102247B
3.1
3.2
3.3
3.4
3.5
5.1
5.2
CX81801-7x/8x SmartV.XX Modem in 128-Pin LQFP with CX20493 in 32-Pin LQFP Data Sheet
CX81801 Modem Hardware Pins and Signals ................................................................................................................ 3-1
3.1.1
3.1.2
3.1.3
3.1.4
CX20493 LSD Hardware Pins and Signals ................................................................................................................... 3-22
3.2.1
3.2.2
CX20442 VC Hardware Pins and Signals (S Models)................................................................................................... 3-28
3.3.1
3.3.2
Electrical and Environmental Specifications ................................................................................................................. 3-35
3.4.1
3.4.2
Crystal Specifications ................................................................................................................................................... 3-42
Overview ......................................................................................................................................................................... 5-1
Register Signal Definitions ............................................................................................................................................. 5-3
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.2.6
5.2.7
5.2.8
5.2.9
Common to Parallel and Serial Interface Configurations................................................................................ 3-1
3.1.1.1
3.1.1.2
3.1.1.3
3.1.1.4
3.1.1.5
Serial Interface Configuration Only................................................................................................................. 3-2
3.1.2.1
Parallel Interface Configuration Only (PARIF = High)..................................................................................... 3-3
3.1.3.1
CX81801 Modem Interface Signals................................................................................................................ 3-3
CX20493 LSD Signal Summary.................................................................................................................... 3-22
3.2.1.1
3.2.1.2
3.2.1.3
3.2.1.4
3.2.1.5
CX20493 LSD Pin Assignments and Signal Definitions ............................................................................... 3-23
CX20442 VC Signal Summary...................................................................................................................... 3-28
3.3.1.1
3.3.1.2
3.3.1.3
3.3.1.4
CX20442 VC Pin Assignments and Signal Definitions ................................................................................. 3-29
Operating Conditions, Absolute Maximum Ratings, and Power Requirements ........................................... 3-35
Interface and Timing Waveforms ................................................................................................................. 3-37
3.4.2.1
3.4.2.2
3.4.2.3
IER - Interrupt Enable Register (Addr = 1, DLAB = 0) .................................................................................... 5-3
FCR - FIFO Control Register (Addr = 2, Write Only) ....................................................................................... 5-4
IIR - Interrupt Identifier Register (Addr = 2) .................................................................................................. 5-5
LCR - Line Control Register (Addr = 3) .......................................................................................................... 5-6
MCR - Modem Control Register (Addr = 4).................................................................................................... 5-7
LSR - Line Status Register (Addr = 5)............................................................................................................ 5-7
MSR - Modem Status Register (Addr = 6) ..................................................................................................... 5-9
RBR - RX Buffer (Receiver Buffer Register) (Addr = 0, DLAB = 0) ................................................................ 5-9
THR - TX Buffer (Transmitter Holding Register) (Addr = 0, DLAB = 0).......................................................... 5-9
LSD Interface (Through DIB)...................................................................................................... 3-1
Call Progress Speaker Interface ................................................................................................. 3-1
Voice Relay Interface (S Models) ............................................................................................... 3-1
Serial EEPROM Interface............................................................................................................ 3-1
External Bus Interface ................................................................................................................ 3-2
Serial DTE Interface and Indicator Outputs (PARIF = Low)........................................................ 3-2
Parallel Host Bus Interface ......................................................................................................... 3-3
CX81801 Interface (Through DIB)............................................................................................ 3-22
Telephone Line Interface .......................................................................................................... 3-22
Voltage References................................................................................................................... 3-22
General Purpose Input/Output.................................................................................................. 3-23
No Connects ............................................................................................................................. 3-23
Speakerphone Interface............................................................................................................ 3-28
Telephone Handset/Headset Interface...................................................................................... 3-28
CX81801 Modem Interface....................................................................................................... 3-28
Host Interface........................................................................................................................... 3-28
External Memory Bus Timing ................................................................................................... 3-37
Parallel Host Bus Timing .......................................................................................................... 3-39
Serial DTE Interface.................................................................................................................. 3-41
Conexant
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