CD2231 Intel Corporation, CD2231 Datasheet - Page 23

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

4.1.6.1
4.1.7
4.1.7.1
4.1.7.2
Datasheet
Name
MPILR
MIR
MISR
MEOIR
Name
DMR
BERCNT
DMABSTS
Name
ARBADRL
ARBADRU
BRBADRL
BRBADRU
ARBCNT
BRBCNT
ARBSTS
BRBSTS
RCBADRL
RCBADRU
Name
ATBADRL
ATBADRU
BTBADRL
BTBADRU
ATBCNT
BTBCNT
Description
A Transmit Buffer Address Lower
A Transmit Buffer Address Upper
Description
Modem Priority Interrupt Level Register
Modem Interrupt Register
Modem (/Timer) Interrupt Status Register
Modem End of Interrupt Register
B Transmit Buffer Address Lower
B Transmit Buffer Address Upper
A Transmit Buffer Byte Count
B Transmit Buffer Byte Count
Description
A Receive Buffer Address Lower
A Receive Buffer Address Upper
B Receive Buffer Address Lower
B Receive Buffer Address Upper
A Receive Buffer Byte Count
B Receive Buffer Byte Count
A Receive Buffer Status
B Receive Buffer Status
Receive Current Buffer Address Lower
Receive Current Buffer Address Upper
Description
DMA Mode Register
Bus Error Retry Count
DMA Buffer Status
Modem Interrupt Registers
DMA Registers
DMA Receive Registers
DMA Transmit Registers
Intelligent Two-Channel LAN and WAN Communications Controller — CD2231
Mode
Mode
Mode
Addr.
Addr.
Mode
Addr.
Addr.
G
G
G
G
P
P
P
P
P
P
G
G
P
P
P
P
P
P
P
P
P
P
P
1
1
1
1
INT
INT
INT
8D
1A
INT
F4
ED
5A
E1
88
50
52
54
56
58
85
4A
4C
4D
3C
3E
40
42
44
46
48
2
2
2
2
MOT
MOT
MOT
MOT
F6
8E
19
EF
5A
E3
8B
52
50
56
54
58
86
4A
4F
4E
3E
3C
42
40
46
44
48
3
3
3
3
Size
B
B
B
Size
Size
Size
W
W
W
W
W
W
W
W
W
W
W
W
W
W
B
B
B
B
B
B
Access
R/W
Access
Access
Access
W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
R
R
R
R
Page
139
140
140
Page
Page
Page
141
142
142
142
143
143
143
144
144
145
145
146
146
146
147
147
137
137
138
139
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