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22.2.3
AC Characteristics
Clock timing parameters are listed in table 22.14, control signal timing parameters in table 22.15,
and bus timing parameters in table 22.16. Timing parameters of the on-chip supporting modules
are listed in table 22.17.
Table 22.14 Clock Timing
Condition:
T
= –20°C to +75°C (regular specifications), T
a
specifications)
Condition A: V
= 3.0 to 5.5 V, AV
CC
fmax = 13 MHz
Condition B: V
= 5.0 V ± 10%, AV
CC
fmax = 20 MHz
Item
Clock cycle time
Clock pulse low width
Clock pulse high width
Clock rise time
Clock fall time
Clock oscillator settling time at
reset
Clock oscillator settling time in
software standby
= 3.0 to 5.5 V, V
CC
= 5.0 V ± 10%, V
CC
A
Symbol
Min
Max
t
76.9
1000
cyc
t
18
—
CL
t
18
—
CH
t
—
15
Cr
t
—
15
Cf
t
20
—
OSC1
t
7
—
OSC2
= –40°C to +85°C (wide-range
a
= 3.0 to AV
REF
CC
= 4.5 to AV
REF
Condition
B
Min
Max
50
1000
15
—
15
—
—
10
—
10
20
—
7
—
, V
= AV
= 0 V,
SS
SS
, V
= AV
= 0 V,
CC
SS
SS
Test
Unit
Conditions
ns
Figure 22.13 to
figure 22.25
ns
ns
ns
ns
ms
Figure 22.13
ms
675
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