Z80181 Zilog., Z80181 Datasheet - Page 18

• Manufacturer Part Number: Z80181
• Description: SMART ACCESS CONTROLLER (SAC)
• Manufacturer: Zilog.

Zilog
ASCI CHANNELS CONTROL REGISTERS
2-18
Upon RESET
Upon RESET
R/W
R/W
Bit
Bit
CNTLA1
CNTLA0
MPE
R/W
MPE
R/W
0
0
R/W
RE
R/W
0
RE
0
R/W
Figure 7. ASCI Control Register A (Ch. 0)
TE
Figure 8. ASCI Control Register A (Ch. 1)
R/W
0
TE
0
CKA1D MPBR/
R/W
/RTS0
R/W
1
1
R/W
EFR
MPBR/
R/W
EFR
x
x
MOD2 MOD1 MOD0
R/W
MOD2 MOD1 MOD0
R/W
0
0
0
0
1
1
1
1
0
0
0
0
0
1
1
1
1
0
R/W
R/W
0
0
1
1
0
0
1
1
0
0
0
1
1
0
0
1
1
0
Addr 01h
Addr 00h
R/W
R/W
0 Start + 7-Bit Data + 1 Stop
1 Start + 7-Bit Data + 2 Stop
0 Start + 7-Bit Data + Parity + 1 Stop
1 Start + 7-Bit Data + Parity + 2 Stop
0 Start + 8-Bit Data + 1 Stop
1 Start + 8-Bit Data + 2 Stop
0 Start + 8-Bit Data + Parity + 1 Stop
1 Start + 8-Bit Data + Parity + 2 Stop
0
0 Start + 7-Bit Data + 1 Stop
1 Start + 7-Bit Data + 2 Stop
0 Start + 7-Bit Data + Parity + 1 Stop
1 Start + 7-Bit Data + Parity + 2 Stop
0 Start + 8-Bit Data + 1 Stop
1 Start + 8-Bit Data + 2 Stop
0 Start + 8-Bit Data + Parity + 1 Stop
1 Start + 8-Bit Data + Parity + 2 Stop
0
MODE Selection
MODE Selection
Read - Multiprocessor Bit Receive
Write - Error Flag Reset
CKA1 Disable
Transmit Enable
Receive Enable
Multiprocessor Enable
Read - Multiprocessor Bit Receive
Write - Error Flag Reset
Request To Send
Transmit Enable
Receive Enable
Multiprocessor Enable
S
MART
A
CCESS
C
DS971800500
ONTROLLER
Z80181
SAC
™