7.2.3
AC Characteristics
Clock Timing
Table 7.14 Clock Timing
Condition A*: V
CC
V
SS
specifications), T
Condition B:
V
CC
V
SS
specifications), T
Note: * In planning stage
Item
Clock cycle time
Clock pulse high width
Clock pulse low width
Clock rise time
Clock fall time
Reset oscillation settling
time (crystal)
Software standby oscillation
settling time (crystal)
External clock output delay
settling time
= 2.7 V to 3.6 V, AV
= AV
= 0 V, ø = 2 MHz to 20 MHz, T
SS
= –40°C to +85°C (wide-range specifications)
a
= 3.0 V to 3.6 V, AV
= AV
= 0 V, ø = 2 MHz to 33 MHz, T
SS
= –40°C to +85°C (wide-range specifications)
a
Symbol
t
cyc
t
CH
t
CL
t
Cr
t
Cf
t
OSC1
t
OSC2
t
DEXT
= 2.7 V to 3.6 V, V
CC
a
= 3.0 V to 3.6 V, V
CC
a
Condition A
Min
Max
Min
50
500
30.3
20
—
10
20
—
10
—
5
—
—
5
—
10
—
10
10
—
10
500
—
500
= 2.7 V to AV
ref
CC
= –20°C to +75°C (regular
= 3.0 V to AV
ref
CC
= –20°C to +75°C (regular
Condition B
Max
Unit
500
ns
—
ns
—
ns
5
ns
5
ns
—
ms
—
ms
µs
—
,
,
Test
Conditions
Figure7.2
Figure7.2
Figure7.3
Figure7.3
421