CD2231 Intel Corporation, CD2231 Datasheet - Page 91

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

8.2.2.2
Datasheet
Register Name: COR1
Register Description: Channel Option Register 1
Default Value: x’00
Access: Byte Read/Write
Parity
Bit 7
COR1 — Asynchronous Mode
Bit 7
Bits 6:5
Bit 4
Bits 3:0
NOTE: Not used in PPP, MNP 4, and SLIP modes.
ParM1
Bit 6
Intelligent Two-Channel LAN and WAN Communications Controller — CD2231
Parity
1 = odd parity
0 = even parity
Parity mode 1 and 0
Defines Parity mode for both transmitter and receiver
Ignore – Ignore parity
0 = evaluate parity on received characters
1 = do not evaluate parity on received characters
Character Length
ParM0
Bit 5
Chl3
ParM1
0
0
0
0
0
0
1
1
Ignore
Chl2
Bit 4
1
1
1
1
ParM0
0
1
0
1
Chl1
0
0
1
1
Bit 3
Chl3
none
force (odd = force 1, even = force 0)
normal
reserved
Chl0
0
1
0
1
Bit 2
Chl2
Character Length Bits
Parity
5
6
7
8
Motorola Hex Address: x’10
Bit 1
Chl1
Intel Hex Address: x’13
Bit 0
Chl0
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