CD2231 Intel Corporation, CD2231 Datasheet - Page 5

• Manufacturer Part Number: CD2231
• Description: CD2231 Intelligent Two-channel Lan And Wan Communications Controller
• Manufacturer: Intel Corporation

8.0
Datasheet
7.5
Detailed Register Descriptions
8.1
8.2
8.3
8.4
8.5
8.6
8.7
Intelligent Two-Channel LAN and WAN Communications Controller — CD2231
Transmit Interrupt Service Routine......................................................................87
Global Registers..................................................................................................88
8.1.1
8.1.2
Option Registers..................................................................................................89
8.2.1
8.2.2
8.2.3
8.2.4
8.2.5
8.2.6
8.2.7
8.2.8
8.2.9
8.2.10 Special Character Range — Async Mode Only ...................................104
8.2.11 LNext Character (LNXT) — Async Mode Only.....................................104
8.2.12 Receive Frame Address Registers — HDLC Sync Mode Only ............105
8.2.13 CRC Polynomial Select Register (CPSR) ............................................106
8.2.14 Transmit Special Mapped Characters — PPP Mode only....................106
8.2.15 Transmit Async Control Character Maps — PPP Mode Only ..............107
8.2.16 Receive Async Control Character Maps — PPP Mode Only ...............108
Bit Rate and Clock Option Registers.................................................................110
8.3.1
8.3.2
Channel Command and Status Registers .........................................................112
8.4.1
8.4.2
8.4.3
8.4.4
Interrupt Registers.............................................................................................122
8.5.1
8.5.2
8.5.3
8.5.4
DMA Registers ..................................................................................................139
8.6.1
8.6.2
8.6.3
8.6.4
8.6.5
Timer Registers .................................................................................................152
8.7.1
8.7.2
8.7.3
8.7.4
8.7.5
Global Firmware Revision Code Register (GFRCR) ..............................88
Channel Access Register (CAR) ............................................................88
Channel Mode Register (CMR) ..............................................................89
Channel Option Register 1 (COR1)........................................................90
Channel Option Register 2 (COR2)........................................................92
Channel Option Register 3 (COR3) — Async-HDLC/PPP Mode ...........94
Channel Option Register 4 (COR4)........................................................98
Channel Option Register 5 (COR5)........................................................99
Channel Option Register 6 (COR6) — Async Mode Only ....................100
Channel Option Register 7 (COR7) — Async Mode Only ....................101
Special Character Registers — Async Modes Only .............................102
Receive Baud Rate Generator Registers .............................................110
Transmit Baud Rate Generator Registers ............................................111
Channel Command Register (CCR) .....................................................112
Special Transmit Command Register (STCR) .....................................115
Channel Status Register (CSR) ...........................................................117
Modem Signal Value Registers (MSVR) ..............................................121
General Interrupt Registers ..................................................................122
Receive Interrupt Registers..................................................................125
Transmit Interrupt Registers.................................................................133
Modem Interrupt Registers ...................................................................137
DMA Mode Register (DMR) .................................................................139
Bus Error Retry Count (BERCNT)........................................................140
DMA Buffer Status (DMABSTS) ...........................................................140
DMA Receive Registers .......................................................................141
DMA Transmit Registers ......................................................................145
Timer Period Register (TPR)................................................................152
Receive Timeout Period Register (RTPR) — Async Mode Only..........153
General Timer 1 (GT1) Sync Modes Only............................................154
General Timer 2 (GT2) Sync Modes Only............................................154
Transmit Timer Register (TTR) Async Modes Only .............................155
...........................................................................88
5