Z180 to i/o interface, Scc/escc user manual, 219 wait state generator logic – Zilog Z80230 User Manual
Page 226
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
29
13
11
Ø
Address
/IORQ
/RD
Data
T1
T2
T
T3
T1
6
28
11
19
16
15
WA