MC68HC11G5 Datasheet, PDF (188/195 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller

Freescale Semiconductor, Inc.
13.11 EVENT COUNTER CHARACTERISTICS
Table 13.1. Clock Input (Required Limit)
Clock Input (Required Limit)
Num
Characteristic
1 Cycle Time of External Clock Input
2 Clock High Time
3 Clock Low Time
4 Rise Time
5 Fall Time
Symbol
Min
Max
Unit
tcycex
3xt _cyc
—
ns
twckh
1.5xt _cyc
—
ns
twckl
1xt _cyc
—
ns
trck
—
0.25xt _cyc
ns
tfck
—
0.25xt _cyc
ns
Table 13.2. Clock Input (Guaranteed Limit)
Clock Input (Guaranteed Limit)
Num
Characteristic
6 Propagation Delay
External Clock Rise to EVO Valid
7 Propagation Delay
External Clock Fall to EVO Valid
Symbol
tovr
Min
Max
Unit
1.5xt _cyc 2.5xt _cyc + 240 ns
tovf
1.5xt _cyc 2.5xt _cyc + 240 ns
1
EVI1, EVI2
4
2
3
5
EVO
6
7
Figure 13-23. Event Counter Mode 1, 2, 3 – Clock Input Timing Diagram
13-22
ELECTRICAL SPECIFICATIONS
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