CD2481 Datasheet, PDF (31/222 Pages) Intel Corporation – Programmable Four-Channel Communications Controller

Programmable Four-Channel Communications Controller — CD2481
Modem Signal Value Registers (MSVR)
Modem Signal Value Register (MSVR-RTS)
Modem Signal Value Register (MSVR-DTR)
R/W
DC DE B R/W
DD DF B R/W
DSR
4.2.5
CD
CTS
DTRop
0
Interrupt Registers
Local Interrupt Vector Register (LIVR)
0
DTR
RTS
0A 09 B R/W
X
X
X
X
X
X
IT1
IT0
Interrupt Enable Register (IER)
Non_Async-HDLC/PPP Mode
Mdm
0
RET
0
12 11 B R/W
RxD
TIMER
TxMpty
TxD
Async-HDLC/PPP Mode
Mdm
0
0
0
RxD
TIMER
TxMpty
TxD
Local Interrupting Channel Register (LICR)
25 26 B R/W
X
X
X
X
C1
C0
X
X
Interrupt Stack Register (STK)
E0 E2 B R
CLvl [1]
4.2.5.1
MLvl [1]
TLvl [1]
0
0
TLvl [0]
MLvl [0]
CLvl [0]
Receive Interrupt Registers
Receive Priority Interrupt Level Register (RPILR)
E3 E1 B R/W
Receive Priority Match Value (only bits 6:0 are significant)
Receive Interrupt Register (RIR)
EF ED B R
Ren
Ract
Reo
0
Rvct [1]
Rvct [0]
Rcn [1]
Rcn [0]
Datasheet
31