
SCC/ESCC
User Manual
UM010903-0515 Application Notes
219
Wait State Generator Logic
Z180 to I/O Interface
The Z180 I/O read/write cycle is similar to the Z80
®
CPU if you clear the /IOC bit in the OMCR
register to 0 (Figure and Figure on page 220). Table on page 220 lists the Z180 key parameters
for an I/O cycle.
Z180 I/O Read Cycle Timing (/IOC = 0)
D
CK
Q
CL
PR
D
CK
Q
CL
PR
'74 '74
/M1
Ø
/M1 /WAIT
/IORQ
/RD
Data
T1 T2 T T3 T1
6
28
11
19
1615
WA
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