Datasheet

Section 21 Electrical Characteristics
Rev.5.00 Nov. 02, 2005 Page 343 of 418
REJ09B0028-0500
21.3.3 AC Characteristics
Table 21.13 AC Characteristics
V
CC
= 2.7 to 5.5 V, V
SS
= 0.0 V, T
a
= –20 to +75°C, unless otherwise indicated.
Applicable
Values
Reference
Item Symbol Pins Test Condition Min Typ Max Unit Figure
System clock
oscillation
f
OSC
OSC1,
OSC2
V
CC
= 4.0 to 5.5 V 2.0 — 20.0 MHz *
1
frequency
2.0 10.0
System clock (φ) t
cyc
1 — 64 t
OSC
*
2
cycle time
— — 12.8 µs
Subclock oscillation
frequency
f
W
X1, X2 — 32.768 — kHz
Watch clock (φ
W
)
cycle time
t
W
X1, X2 — 30.5 — µs
Subclock (φ
SUB
)
cycle time
t
subcyc
2 — 8 t
W
*
2
Instruction cycle
time
2 — — t
cyc
t
subcyc
Oscillation
stabilization time
(crystal resonator)
t
rc
OSC1,
OSC2
— — 10.0 ms
Oscillation
stabilization time
(ceramic resonator)
t
rc
OSC1,
OSC2
— — 5.0 ms
Oscillation
stabilization time
t
rcx
X1, X2 — — 2.0 s
External clock t
CPH
OSC1 V
CC
= 4.0 to 5.5 V 20.0 — — ns Figure 21.1
high width
40.0 — —
External clock t
CPL
OSC1 V
CC
= 4.0 to 5.5 V 20.0 — — ns
low width
40.0 — —
External clock t
CPr
OSC1 V
CC
= 4.0 to 5.5 V — — 10.0 ns
rise time
— — 15.0
External clock t
CPf
OSC1 V
CC
= 4.0 to 5.5 V — — 10.0 ns
fall time
— — 15.0
RES pin low
width
t
REL
RES At power-on and in
modes other than
those below
t
rc
— — ms Figure 21.2
In active mode and
sleep mode
operation
200 — — ns