
CD2481
—
Programmable Four-Channel Communications Controller
24
Datasheet
4.1.6
DMA Registers
4.1.6.1
DMA Receive Registers
4.1.6.2
DMA Transmit Registers
Name
Description
Addr.
Mode
1
INT
2
MOT
3
Size
Access
Page
DMR
DMA Mode Register
G
F4
F6
B
W
182
BERCNT
Bus Error Retry Count
G
8D
8E
B
R/W
182
DMABSTS
DMA Buffer Status
P
1A
19
B
R
183
Name
Description
Addr.
Mode
1
INT
2
MOT
3
Size
Access
Page
ARBADRL
A Receive Buffer Address Lower
P
40
42
W
R/W
184
ARBADRU
A Receive Buffer Address Upper
P
42
40
W
R/W
184
BRBADRL
B Receive Buffer Address Lower
P
44
46
W
R/W
185
BRBADRU
B Receive Buffer Address Upper
P
46
44
W
R/W
185
ARBCNT
A Receive Buffer Byte Count
P
48
4A
W
R/W
186
BRBCNT
B Receive Buffer Byte Count
P
4A
48
W
R/W
186
ARBSTS
A Receive Buffer Status
P
4C
4F
B
R/W
186
BRBSTS
B Receive Buffer Status
P
4D
4E
B
R/W
187
RCBADRL
Receive Current Buffer Address Lower
P
3C
3E
W
R
188
RCBADRU
Receive Current Buffer Address Upper
P
3E
3C
W
R
188
Name
Description
Addr.
Mode
1
INT
2
MOT
3
Size
Access
Page
ATBADRL
A Transmit Buffer Address Lower
P
50
52
W
R/W
189
ATBADRU
A Transmit Buffer Address Upper
P
52
50
W
R/W
189
BTBADRL
B Transmit Buffer Address Lower
P
54
56
W
R/W
190
BTBADRU
B Transmit Buffer Address Upper
P
56
54
W
R/W
190
ATBCNT
A Transmit Buffer Byte Count
P
58
5A
W
R/W
191
BTBCNT
B Transmit Buffer Byte Count
P
5A
58
W
R/W
191
ATBSTS
A Transmit Buffer Status
P
5C
5F
B
R/W
191
BTBSTS
B Transmit Buffer Status
P
5D
5E
B
R/W
192
TCBADRL
Transmit Current Buffer Address Lower
P
38
3A
W
R
196
TCBADRU
Transmit Current Buffer Address Upper
P
3A
38
W
R
196