CD2481 Datasheet, PDF (33/222 Pages) Intel Corporation – Programmable Four-Channel Communications Controller

Programmable Four-Channel Communications Controller — CD2481
Async-HDLC/PPP / SLIP / MNP4 Modes
TermBuff
4.2.5.2
DiscExc
SetTm2
SetTm1
NoTrans
0
0
Transmit Interrupt Registers
Transmit Priority Interrupt Level Register (TPILR) E2 E0 B
0
R/W
Transmit Priority Match Value (only bits 6:0 are significant)
Transmit Interrupt Register (TIR)
EE EC B R
Ten
Tact
Teoi
0
Tvct [1]
Tvct [0]
Tcn [1]
Tcn [0]
Transmit Interrupt Status Register (TISR)
89 8A B R
Berr
EOF
EOB
UE
BA/BB
0
TxEmpty
TxDat
Transmit FIFO Transfer Count (TFTC)
83 80 B R
0
0
0
TxCt4
TxCt3
TxCt2
TxCt1
TxCt0
Transmit Data Register (TDR)
F8 F8 B W
D7
D6
D5
D4
D3
D2
D1
D0
Transmit End of Interrupt Register (TEOIR)
86 85 B W
TermBuff
4.2.5.3
EOF
SetTm2
SetTm1
Notrans
Modem/Timer Interrupt Registers
Modem Priority Interrupt Level Register (MPILR)
0
0
E1 E3 B
0
R/W
Modem Priority Match Value (only bits 6:0 are significant)
Modem Interrupt Register (MIR)
ED EF B R
Men
Mact
Meoi
0
Mvct [1]
Mvct [0]
Mcn [1]
Mcn [0]
DSRChg
Modem (/Timer) Interrupt Status Register (MISR)
88 8B B
CDChg
CTSChg
res
res
res
Timer2
R/W
Timer1
Datasheet
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