Z80180 Datasheet, PDF (32/326 Pages) Zilog, Inc. – Z8018x Family MPU

Z 8018x Fam ily
M PU Us e r M anual
17
Phi
IORQ
RD
WR
T1
T2
TW
T3
Figure 7. I/O Read and Write Cycles with IOC = 1 Timing Diagram
When IOC is 0, the timing of the IORQ and RD signals match the timing
required by the Z80 family of peripherals. The IORQ and RD signals go
active as a result of the rising edge of T2. This timing allows the Z8X180
to satisfy the setup times required by the Z80 peripherals on those two
signals (Figure ).
Phi
IORQ
RD
WR
T1
T2
TW
T3
Figure 8. I/O Read and Write cycles with IOC = 0 Timing Diagram
For the remainder of this document, assume that M1E is 0 and IOC is 0.
UM005001-ZMP0400