Rev. 1.0, 09/02, page 549 of 568
23.3.1 Clock
Timing
Table 23.4 lists the clock timing
Table 23.4 Clock Timing
Conditions : V
CC
= 4.5 V to 5.5 V, AV
CC
= 4.5 V to 5.5 V, V
SS
= AV
SS
= 0 V,
φ
=4MHz to 24MHz,
T
a
= –20°C to +75°C (regular specifications), T
a
= –40°C to +85°C (wide-range
specifications)
Item
Symbol
Min Max Unit Test
Conditions
Clock cycle time
t
cyc
41.6
250
ns Figure
23.2
Clock high pulse width
t
CH
TBD
ns
Clock low pulse width
t
CL
TBD
ns
Clock rise time
t
Cr
TBD
ns
Clock fall time
t
Cf
TBD
ns
Oscillation settling time at reset
(crystal)
t
OSC1
20
ms Figure
23.3
Oscillation settling time in
software standby (crystal)
t
OSC2
8
ms Figure
21.3
External clock output settling
delay time
t
DEXT
2
ms Figure
23.3
t
Cr
t
CL
t
Cf
t
CH
φ
t
cyc
Figure 23.2 System Clock Timing
Summary of Contents for H8S/2627
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