
CD2481
—
Programmable Four-Channel Communications Controller
34
Datasheet
Modem End of Interrupt Register (MEOIR)
85
86
B
W
4.2.6
DMA Registers
DMA Mode Register (DMR)
F4
F6
F8
W
Bus Error Retry Count (BERCNT)
8D
8E
B
R/W
DMA Buffer Status (DMABSTS)
1A
19
B
R
4.2.6.1
DMA Receive Registers
A Receive Buffer Address Lower (ARBADRL)
A Receive Buffer Address Upper (ARBADRU)
B Receive Buffer Address Lower (BRBADRL)
B Receive Buffer Address Upper (BRBADRU)
40
42
44
46
42
40
46
44
W
W
W
W
R/W
R/W
R/W
R/W
A Buffer Receive Byte Count (ARBCNT)
B Buffer Receive Byte Count (BRBCNT)
48
4A
4A
48
W
W
R/W
R/W
A Receive Buffer Status (ARBSTS)
B Receive Buffer Status (BRBSTS)
4C
4D
4F
4E
B
B
R/W
R/W
Receive Current Buffer Address Lower (RCBADRL)
Receive Current Buffer Address Upper (RCBADRU)
3C
3E
3E
3C
W
W
R
R
4.2.6.2
DMA Transmit Registers
A Transmit Buffer Address Lower (ATBADRL)
A Transmit Buffer Address Upper (ATBADRU)
50
52
52
50
W
W
R/W
R/W
0
0
SetTm2
SetTm1
0
0
0
0
EnSync
0
0
0
ByteDMA
0
0
0
Binary Value
TDAligr
RstApd
CrtBuf
Append
Ntbuf
Tbusy
Nrbuf
Rbusy
Berr
EOF
EOB
0
0
0
0
2481own