Section 21 Electrical Characteristics
Rev. 3.00 Sep. 27, 2007 Page 710 of 758
REJ09B0243-0300
21.3.1 Clock
Timing
Table 21.5 Clock Timing
Conditions: V
CC
= AV
CC
= 4.0 V to 5.5 V, V
SS
= PLLV
SS
= AV
SS
= 0 V,
T
a
= –20 to +85
°
C (consumer specifications),
T
a
= –40 to +85
°
C (industrial specifications)
Item Symbol
Min.
Max.
Unit
Reference
Figure
EXTAL clock input frequency
f
EX
10 12.5
MHz
EXTAL clock input cycle time
t
EXcyc
80
100
ns
EXTAL clock input low pulse width
t
EXL
20
ns
EXTAL clock input high pulse width
t
EXH
20
ns
EXTAL clock input rising time
t
EXr
5
ns
EXTAL clock input falling time
t
EXf
5
ns
Figure 21.1
CK (B
φ
) clock frequency (reference
values)
f
OP
10 40
MHz
CK (B
φ
) clock cycle time (reference
values)
t
cyc
25 100
ns
*
Power-on oscillation stabilization time
t
OSC1
10
ms Figure
21.2
Oscillation stabilization time on return
from standby 1
t
OSC2
10
ms Figure
21.3
Oscillation stabilization time on return
from standby 2
t
OSC3
10
ms Figure
21.4
Note:
*
Depends on the frequency control register (FRQCR).
t
EXH
t
EXf
t
EXr
t
EXL
t
EXcyc
V
IH
V
IH
V
IH
1/2 V
CC
1/2 V
CC
V
IL
V
IL
EXTAL
(input)
Figure 21.1 Timing of EXTAL Input Clock Signal
Содержание SH7124 R5F7124
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