ZiLOG Z8 - Instruction Notation and Binary Encoding

Pin Descriptions and Functions
~
RESET
+5V
TIMING {
R/W
GND
AND
CONTROL
OS
AS
XTAL1
} CLOCK
XTAL2
POo
.....
P
0
1
P
2
0
....
P02
P
2
1
PORTO
....
P03
P22
(NIBBLE
P23
PROGRAMMABLE)
....
P04
PORT 2
1/0 OR Aa-A1s
.....
POs
P24
(BIT PROGRAMMABLE)
.....
POs
P
2
s
....
P07
P
2
s
P
2
7
.....
P10
.....
P11
P30
PORT 1
.....
P12
P31
(BYTE
P
1
3
P32
PROGRAMMABLE)
P14
Z8612
P33
PORT 3
1/0 OR ADo-AD7
SERIAL AND PARALLEL
P1s
P34
1/0 CONTROL
P1s
P3s
P
1
7 P3s
P37
~
Do
--.-..
D1
PROGRAM
--...
D2 A1
MEMORY
--...
D3
DATA
--...
INPUTS
D4
Ds
Ds
PROGRAM MEMORY
D7
ADDRESS OUTPUTS
INTERRUPT ACKNOWLEDGE
lACK
MEMORY DATA STROBE
MDS
Ag
INSTRUCTION SYNC
SYNC
A10
SYSTEM CLOCK
SCLK
A11
Figure A-1. 18612 Pin Functions
A-2
3047-055