Z8F6421PM020SC Datasheet, PDF (245/299 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series

Z8 Encore!^® 64K Series
Product Specification
225
General Purpose I/O Port Input Data Sample Timing
Figure 50 illustrates timing of the GPIO Port input sampling. Table 113 lists the GPIO port
input timing.
System
Clock
GPIO Pin
Input Value
Port Value
Changes to 0
TCLK
GPIO Input
Data Latch
GPIO Data
Read on Data Bus
0 Latched
Into Port Input
Data Register
GPIO Data Register
Value 0 Read
by eZ8 CPU
Figure 50. Port Input Sample Timing
Table 113. GPIO Port Input Timing
Parameter
T_{S_PORT}
T_{H_PORT}
T_SMR
Abbreviation
Port Input Transition to XIN Fall Setup Time
(Not pictured)
XIN Fall to Port Input Transition Hold Time
(Not pictured)
GPIO Port Pin Pulse Width to Insure STOP Mode
Recovery
(for GPIO Port Pins enabled as SMR sources)
Delay (ns)
Min
Max
5
–
6
–
1μs
PS019915-1005
Electrical Characteristics