CD1865 Datasheet, PDF (116/150 Pages) Intel Corporation – Intelligent Eight-Channel Communications Controller

CD1865 — Intelligent Eight-Channel Communications Controller
9.4.3
Channel Option Register 1
Register Name: COR1
Register Description: Channel Option Register 1
Default Value: 0
Access: Read/Write
Bit 7
Bit 6
Bit 5
Bit 4
Parity
ParM1
ParM0
Ignore
Bit 3
Stop 1
Bit 2
Stop 0
8-Bit Hex Address: $03
Intel Hex Address: $06
Motorola Hex Address: $07
Bit 1
Bit 0
CHL 1
CHL 0
Changes to this register must be signalled by the Channel Command register
.
Bit
Bit 7
Bits 6:5
Bit 4
Bits 3:2
Bits 1:0
Description
Parity:
1 = odd parity.
0 = even parity.
Parity Mode 1 and 0: Defines Parity mode for both the transmitter and the receiver.
ParM1
0
0
1
1
ParM0
0
1
0
1
Parity
No parity
Force parity (odd parity = force 1, even = force 0)
Normal parity
Not used
Ignore: Ignore parity
0 = Evaluate parity on received characters.
1 = Do not evaluate parity on received characters.
Stop Bit Length: Specifies the length of the Stop bit.
Stop1
0
0
1
1
Stop0
0
1
0
1
Stop Bit
1 Stop bit
1 1/2 Stop bits
2 Stop bits
2 1/2 Stop bits
Character Length:
CHL1
0
0
1
1
CHL0
0
1
0
1
Character Length
5 bits
6 bits
7 bits
8 bits
9.4.4
Channel Option Register 2
Register Name: COR2
Register Description: Channel Option Register 2
Default Value: 0
Access: Read/Write
Bit 7
Bit 6
Bit 5
Bit 4
IXM
TxIBE
ETC
LLM
Bit 3
RLM
Bit 2
RtsAO
8-Bit Hex Address: $04
Intel Hex Address: $08
Motorola Hex Address: $09
Bit 1
Bit 0
CtsAE
DsrAE
Changes only to bit 4 (LLM) of this register must be signalled by the Channel Command register.
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Datasheet