Z86C21 Datasheet, PDF (20/35 Pages) Zilog, Inc. – 8K ROM Z8 CMOS MICROCONTROLLER

AC CHARACTERISTICS
External I/O or Memory Read or Write Timing Diagram
Z86C21 MCU
WITH 8K ROM
R//W
Port 0, /DM
Port 1
/AS
/DS
(Read)
Port 1
/DS
(Write)
13
12
18
A7 - A0
1
2
16
3
4
5
17
A7 - A0
14
D7 - D0 IN
9
8
11
6
10
D7 - D0 OUT
15
7
17
Figure 19. External I/O or Memory Read/Write Timing
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