Z85233 Datasheet, PDF (167/317 Pages) Zilog, Inc. – The Zilog SCC Serial Communication Controller

Application Note
The Z180™ Interfaced with the SCC at MHZ
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 (Figures 7
and 8). Table 5 shows the Z180 key parameters for an I/O
cycle.
T1
T2
TWA
T3
T1
Ø
Address
6
/IORQ
28
/RD
29
11
19
Data
13
11
15
16
Figure 7. Z180 I/O Read Cycle Timing (/IOC = 0)
6-32
Ø
Address
/IORQ
/WR
Data
T1
T2
Tw
T3
T1
6
25
29
11
22
25
26
23
27
24
21
Figure 8. Z180 I/O Write Cycle Timing
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