参数资料
型号: SCD223110QCD
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 2 CHANNEL(S), 256K bps, SERIAL COMM CONTROLLER, PQFP100
封装: METRIC, QFP-100
文件页数: 167/178页
文件大小: 2247K
代理商: SCD223110QCD
Intelligent Two-Channel LAN and WAN Communications Controller — CD2231
Datasheet
89
8.2
Option Registers
8.2.1
Channel Mode Register (CMR)
Bit 7
Receive Transfer mode
0 – Interrupt
1 – DMA
Bit 6
Transmit Transfer mode
0 – Interrupt
1 – DMA
Bits 5:3
Reserved – must be ‘0’.
Bits 2:0
Protocol mode select
If these options are changed, an initialize command must be given to the CD2231
through the Channel Command register.
C0
Channel number
0
Channel 0
1
Channel 1
Register Name: CMR
Register Description: Channel Mode
Default Value: x’02
Access: Byte Read/Write
Intel Hex Address: x’18
Motorola Hex Address: x’1B
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RxMode
TxMode
0
chmd2
chmd1
chmd0
chmd2
chmd1
chmd0
0
HDLC
0
1
Reserved
0
1
0
Async
0
1
Reserved
1
0
Async–HDLC/PPP
10
1
SLIP
11
0
MNP4/ARAP
1
Reserved
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