Z84C90_12 Datasheet, PDF (41/56 Pages) Zilog, Inc. – KIO Serial/Parallel Counter/Timer

Z84C90 KIO Serial/Parallel Counter/Timer
Product Specification
34
Clock
M1
RD
DATA
IEI
IEO
ED
Op Code Fetch 1
4D
Op Code Fetch 2
T4
T1
T2
T3
T4
T1
T2
T3
T4
T1
74
74
12
73
22
71
72
Figure 38. RETI Timing Interrupt Pending
Figure 39 shows the read and write timing of the Z84C90 KIO Peripheral’s GPIO ports.
PS011804-0612
DC Characteristics