CD2231

Manufacturer Part NumberCD2231
DescriptionCD2231 Intelligent Two-channel Lan And Wan Communications Controller
ManufacturerIntel Corporation
CD2231 datasheet
 
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CD2231 — Intelligent Two-Channel LAN and WAN Communications Controller
8.4.3.1
CSR — HDLC Mode
Register Name: CSR
Register Description: Channel Status
Default Value: x’00
Access: Byte Read/Write
Bit 7
Bit 6
Bit 5
RxEn
RxFlag
RxFrame
Bit 7
Receiver enable
0 = Receiver is disabled
1 = Receiver is enabled
Bit 6
Rx flag
0 = Currently not receiving flag/sync
1 = Currently receiving flag/sync
Bit 5
Rx frame
0 = Currently not receiving frame
1 = Currently receiving frame
Bit 4
Rx mark
0 = Currently not receiving continuous mark
1 = Currently receiving continuous mark
Bit 3
Transmitter enable
0 = Transmitter is disabled
1 = Transmitter is enabled
Bit 2
Tx flag
0 = Currently not transmitting flag
1 = Currently transmitting flag
Bit 1
Tx frame
0 = Currently not transmitting frame
1 = Currently transmitting frame
Bit 0
Tx mark
0 = Currently not transmitting continuous ones
1 = Currently transmitting continuous ones
8.4.3.2
CSR — Async Mode
Register Name: CSR
Register Description: Channel Status
Default Value: x’00
Access: Byte Read/Write
Bit 7
Bit 6
Bit 5
RxEn
RxFloff
RxFlon
If the host determines that a flow control state is inappropriate, it can be cleared by enabling or
disabling the transmitter or receiver by CCR command.
118
Bit 4
Bit 3
Bit 2
RxMark
TxEn
TxFlag
Bit 4
Bit 3
Bit 2
0
TxEn
TxFloff
Intel Hex Address: x’19
Motorola Hex Address: x’1A
Bit 1
Bit 0
TxFrame
TxMark
Intel Hex Address: x’19
Motorola Hex Address: x’1A
Bit 1
Bit 0
TxFlon
0
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