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PDF CX81801-7x Data sheet ( Hoja de datos )
| Número de pieza | CX81801-7x | |
| Descripción | V.92 / V.34 / V.32bis Modem | |
| Fabricantes | Conexant | |
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CX81801-7x/8x SmartV.XX Modem Data Sheet
3.1.2 Serial Interface Configuration Only................................................................................................................. 3-2
3.1.2.1 Serial DTE Interface and Indicator Outputs (PARIF = Low)........................................................3-2
3.1.3 Parallel Interface Configuration Only (PARIF = High).................................................................................... 3-3
3.1.3.1 Parallel Host Bus Interface ........................................................................................................ 3-3
3.1.4 CX81801 Modem Interface Signals............................................................................................................... 3-3
3.2 CX20493 LSD Hardware Pins and Signals .................................................................................................................. 3-22
3.2.1 CX20493 LSD Signal Summary................................................................................................................... 3-22
3.2.1.1 Smart Modem Interface (Through DIB) ...................................................................................3-22
3.2.1.2 Telephone Line Interface ......................................................................................................... 3-22
3.2.1.3 Voltage References................................................................................................................... 3-22
3.2.1.4 General Purpose Input/Output..................................................................................................3-23
3.2.1.5 No Connects ............................................................................................................................. 3-23
3.2.2 CX20493 LSD Pin Assignments and Signal Definitions .............................................................................. 3-23
3.3 CX20442 VC Hardware Pins and Signals (S Models).................................................................................................. 3-28
3.3.1 CX20442 VC Signal Summary..................................................................................................................... 3-28
3.3.1.1 Speakerphone Interface............................................................................................................ 3-28
3.3.1.2 Telephone Handset/Headset Interface......................................................................................3-28
3.3.1.3 CX81801 Modem Interface.......................................................................................................3-28
3.3.1.4 Host Interface........................................................................................................................... 3-28
3.3.2 CX20442 VC Pin Assignments and Signal Definitions ................................................................................ 3-29
3.4 Electrical and Environmental Specifications ................................................................................................................ 3-35
3.4.1 Operating Conditions, Absolute Maximum Ratings, and Power Requirements ...........................................3-35
3.4.2 Interface and Timing Waveforms ................................................................................................................ 3-37
3.4.2.1 External Memory Bus Timing ...................................................................................................3-37
3.4.2.2 Parallel Host Bus Timing ......................................................................................................... 3-39
3.4.2.3 Serial DTE Interface.................................................................................................................. 3-41
3.5 Crystal Specifications ..................................................................................................................................................3-42
4. Package Dimensions ............................................................................................................. ............... 4-1
5. Parallel Host Interface ........................................................................................................ .................. 5-1
5.1 Overview .........................................................................................................................................................................5-1
5.2 Register Signal Definitions ............................................................................................................................................5-3
5.2.1 IER - Interrupt Enable Register (Addr = 1, DLAB = 0) ................................................................................... 5-3
5.2.2 FCR - FIFO Control Register (Addr = 2, Write Only) ...................................................................................... 5-4
5.2.3 IIR - Interrupt Identifier Register (Addr = 2) ................................................................................................. 5-5
5.2.4 LCR - Line Control Register (Addr = 3) ......................................................................................................... 5-6
5.2.5 MCR - Modem Control Register (Addr = 4)................................................................................................... 5-7
5.2.6 LSR - Line Status Register (Addr = 5)........................................................................................................... 5-7
5.2.7 MSR - Modem Status Register (Addr = 6) .................................................................................................... 5-9
5.2.8 RBR - RX Buffer (Receiver Buffer Register) (Addr = 0, DLAB = 0) ................................................................5-9
5.2.9 THR - TX Buffer (Transmitter Holding Register) (Addr = 0, DLAB = 0)..........................................................5-9
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
102199B
Conexant
v
5 Page 
CX81801-7x/8x SmartV.XX Modem Data Sheet
Figure 1-1. SmartV.XX Modem Simplified Interface Diagram
PARALLEL
HOST BUS OR
SERIAL DTE
INTERFACE
CX81801
Modem
128-Pin TQFP
Digital
Isolation
Barrier
(DIB)
CX20493
SmartDAA
Line Side
Device (LSD)
28-Pin QFN
Telephone
Line
Interface
Discrete
Components
TIP TELEPHONE LINE
RING
TIP HANDSET (OPTIONAL)
RING
CX20442
Voice Codec
(VC)
32-Pin TQFP
(Optional)
MIC (OPTIONAL)
SPEAKER
Figure 1-2. SmartV.XX Modem Major Interfaces
102199_001
CX81801 Modem
128-Pin TQFP
SmartDAA
Interface
Digital
Isolation
Barrier (DIB)
Components
Rectifier
and Filter
Components
DAA Hardware
CX20493 SmartDAA
Line Side Device (LSD)
28-Pin QFN
Line
Side
DIB
Interface
(LSDI)
Codec
Telephone
Line
Interface
Paralle Host
or Serial DTE
Interface
Microcontroller
Unit (MCU)
Modem Data
Pump (MDP)
CX20442
Voice Codec (VC)
32-Pin TQFP
(Optional)
RAM
(32K x 8)
ROM
(256k x 8)
Serial EEPROM
2K (256 x 8) to
256K (32K x 8)
(Optional)
Optional RAM
Up to 1M (128K x 8)
Optional Flash ROM
Up to 4M (512K x 8)
Telephone
Line Interface
Discrete
Components
TELEPHONE
LINE
TIP
RING
Voice Relay,
HS Pickup
Detector
(Optional)
TELEPHONE
HANDSET
TIP
RING
HS Hybrid
Components
(Optional)
(Mic/Speaker)
Interface
(Optional)
Digital Speaker
Circuit (Optional)
MIC
SPEAKER
SOUNDUCER
102199B
Conexant
102199_002
1-3
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| PDF Descargar | [ Datasheet CX81801-7x.PDF ] | |
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