Pin status – Zilog Z80180 User Manual
Page 304
Z8018x
Family MPU User Manual
288
UM005003-0703
•
1 : High
•
0 : Low
•
A : Programmable
•
Z : High Impedance
•
IN : Input
•
OUT : Output
•
* : Invalid
PIN STATUS
Tables 56 describes the status of each ping during RESET and LOW
POWER OPERATION modes.
Internal
DMA
Memory Read
1
0
1
0
1
1
*
1
0
A
IN
Memory Write
1
0
1
1
0
1
*
1
0
A
OUT
I/O Read
1
1
0
0
1
1
*
1
0
A
IN
I/O Write
1
1
0
1
0
1
*
1
0
A
OUT
RESET
1
1
1
1
1
1
1
1
1
Z
IN
Table 55. Pin Outputs in Each Operating Mode (Continued)
Mode
M1 MREQ IORQ RD WR RFSH HALT BUSACK ST
Address
BUS
Data
BUS