Timing, Read cycle, Write cycle – Zilog Z08470 User Manual
Page 325: Read cycle write cycle, Figure 128. read cycle timing, Timing read cycle
Z80 CPU Peripherals
User Manual
UM008101-0601
Serial Input/Output
305
TIMING
Read Cycle
The timing signals that are generated by a Z80 CPU input instruction,
which read a Data or Status byte from the Z80 SIO, are illustrated in
Figure 128.
Figure 128. Read Cycle Timing
Write Cycle
Figure 129 illustrates the timing and data signals generated by a
Z80 CPU output instruction, which write a Data or Control byte
to the Z80 SIO.
Out
Channel Address
T
1
Φ
CE
IORQ
RD
M1
Data
T
2
T
W
T
3
T
1