Datasheet

Section 23 Clock Pulse Generator
Rev.7.00 Mar. 18, 2009 page 960 of 1136
REJ09B0109-0700
Table 23.3 External Clock Input Conditions
V
CC
= 3.0 V to 3.6 V
Item Symbol Min Max Unit Test Conditions
External clock input
low pulse width
t
EXL
15 — ns Figure 23.5
External clock input
high pulse width
t
EXH
15 — ns
External clock rise time t
EXr
— 5 ns
External clock fall time t
EXf
— 5 ns
Clock low pulse width t
CL
0.4 0.6 t
cyc
Clock high pulse width t
CH
0.4 0.6 t
cyc
t
EXH
t
EXL
t
EXr
t
EXf
V
CC
× 0.5
EXTAL
Figure 23.5 External Clock Input Timing