z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 304

• Manufacturer Part Number: z80189
• Description: Z80180, Z8s180, Z8l180 Mpu Operation
• Manufacturer: ZiLOG Semiconductor

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