Z80189 Datasheet, PDF (43/107 Pages) Zilog, Inc. – GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog
PRELIMINARY
Z8S180 MPU REGISTERS
ASCI CHANNELS CONTROL REGISTERS
Z80189/Z8L189
GENERAL-PURPOSE EMBEDDED CONTROLLERS
CNTLA0
Bit MPE RE
Upon RESET
R/W
0
0
R/W R/W
Addr 00H
TE
/RTS0
MPBR/
EFR
MOD2
MOD1
MOD0
0
1
x
0
0
0
R/W R/W R/W R/W R/W R/W
MODE Selection
0
0
0 Start + 7-Bit Data + 1 Stop
0
0
1 Start + 7-Bit Data + 2 Stop
0
1
0 Start + 7-Bit Data + Parity + 1 Stop
0
1
1 Start + 7-Bit Data + Parity + 2 Stop
1
0
0 Start + 8-Bit Data + 1 Stop
1
0
1 Start + 8-Bit Data + 2 Stop
1
1
0 Start + 8-Bit Data + Parity + 1 Stop
1
1
1 Start + 8-Bit Data + Parity + 2 Stop
Read - Multiprocessor Bit Receive
Write - Error Flag Reset
Request To Send
Transmit Enable
Receive Enable
Multiprocessor Enable
Figure 32. ASCI Control Register A (Ch. 0)
Bit
Upon RESET
R/W
CNTLA1
MPE RE
0
0
R/W R/W
TE
0
R/W
Addr 01H
CKA1D
MPBR/
EFR
MOD2
MOD1
MOD0
1
x
0
0
0
R/W R/W R/W R/W R/W
MODE Selection
0
0
0 Start + 7-Bit Data + 1 Stop
0
0
1 Start + 7-Bit Data + 2 Stop
0
1
0 Start + 7-Bit Data + Parity + 1 Stop
0
1
1 Start + 7-Bit Data + Parity + 2 Stop
1
0
0 Start + 8-Bit Data + 1 Stop
1
0
1 Start + 8-Bit Data + 2 Stop
1
1
0 Start + 8-Bit Data + Parity + 1 Stop
1
1
1 Start + 8-Bit Data + Parity + 2 Stop
Read - Multiprocessor Bit Receive
Write - Error Flag Reset
CKA1 Disable
Transmit Enable
Receive Enable
Multiprocessor Enable
Figure 33. ASCI Control Register A (Ch. 1)
DS971890301
43