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PDF CX20493 Data sheet ( Hoja de datos )
| Número de pieza | CX20493 | |
| Descripción | Modem in 128-Pin TQFP | |
| Fabricantes | Conexant Systems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CX20493 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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CX81801-7x/8x
SmartV.XX Modem
V.92/V.34/V.32bis Modem in 128-Pin TQFP
with CX20493 SmartDAA® and Optional
CX20442 Voice Codec
Data Sheet
Doc. No. 102199B
July 22, 2004
1 page  
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
RING
TIP
RING
TELEPHONE LINE
HANDSET (OPTIONAL)
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
Voice Relay,
HS Pickup
Detector
(Optional)
HS Hybrid
Components
(Optional)
(Mic/Speaker)
Interface
(Optional)
Digital Speaker
Circuit (Optional)
TELEPHONE
LINE
TIP
RING
TELEPHONE
HANDSET
TIP
RING
MIC
SPEAKER
SOUNDUCER
102199B
Conexant
102199_002
1-3
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CX20493.PDF ] | |
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