Programmable Four-Channel Communications Controller
—
CD2481
Datasheet
21
4.1.2
Option Registers
Name
Description
Addr.
Mode
1
INT
2
MOT
3
Size
Access
Page
CMR
Channel Mode Register
P
18
1B
B
R/W
113
COR1
Channel Option Register 1
P
13
10
B
R/W
114
COR2
Channel Option Register 2
P
14
17
B
R/W
116
COR3
Channel Option Register 3
P
15
16
B
R/W
123
COR4
Channel Option Register 4
P
16
15
B
R/W
130
COR5
Channel Option Register 5
P
17
14
B
R/W
131
COR6
Channel Option Register 6
P
1B
18
B
R/W
132
COR7
Channel Option Register 7
P
04
07
B
R/W
135
SCHR1
Special Character Register 1
P
1C
1F
B
R/W Async
136
SCHR2
Special Character Register 2
P
1D
1E
B
R/W Async
137
SCHR3
Special Character Register 3
P
1E
1D
B
R/W Async
138
SCHR4
Special Character Register 4
P
1F
1C
B
R/W Async
138
SCRl
Special Character Range low
P
20
23
B
R/W Async
138
SCRh
Special Character Range high
P
21
22
B
R/W Async
139
LNXT
LNext Character
P
2D
2E
B
R/W Async
139
RFAR1
Receive Frame Address Register 1
P
1C
1F
B
R/W Sync
139
RFAR2
Receive Frame Address Register 2
P
1D
1E
B
R/W Sync
140
RFAR3
Receive Frame Address Register 3
P
1E
1D
B
R/W Sync
140
RFAR4
Receive Frame Address Register 4
P
1F
1C
B
R/W Sync
140
CPSR
CRC Polynomial Select Register
P
D4
D6
B
R/W Sync
141
TSPMAP1
Transmit Special Mapped Character 1
P
1B
18
B
R/W PPP
141
TSPMAP2
Transmit Special Mapped Character 2
P
04
07
B
R/W PPP
141
TSPMAP3
Transmit Special Mapped Character 3
P
2D
2E
B
R/W PPP
142
TXACCM0
Transmit Async Control Character Map 0
P
1C
1F
B
R/W PPP
142
TXACCM1
Transmit Async Control Character Map 1
P
1D
1E
B
R/W PPP
142
TXACCM2
Transmit Async Control Character Map 2
P
1E
1D
B
R/W PPP
143
TXACCM3
Transmit Async Control Character Map 3
P
1F
1C
B
R/W PPP
143
RXACCM0
Receive Async Control Character Map 0
P
20
23
B
R/W PPP
143
RXACCM1
Receive Async Control Character Map 1
P
21
22
B
R/W PPP
144
RXACCM2
Receive Async Control Character Map 2
P
22
21
B
R/W PPP
144
RXACCM3
Receive Async Control Character Map 3
P
23
20
B
R/W PPP
144