Datasheet

Section 23 Electrical Characteristics
Rev. 1.50 Sep. 18, 2007 Page 508 of 584
REJ09B0240-0150
23.2.3 AC Characteristics
Table 23.3 AC Characteristics
V
CC
= 3.0 to 5.5 V, V
SS
= 0.0 V, T
a
= –20 to +75°C/–40 to +85°C, unless otherwise indicated.
Values
Item Symbol
Applicable
Pins
Test Condition
Min. Typ. Max.
Unit
Reference
Figure
f
OSC
OSC1, OSC2 V
CC
= 4.0 to 5.5 V 4.0  20.0 MHz System clock oscillation
frequency
4.0  10.0
t
cyc
1  64 t
OSC
* System clock (φ)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
*
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
t
CPH
OSC1 V
CC
= 4.0 to 5.5 V 20.0   ns Figure 23.1 External clock high
width
40.0  
t
CPL
OSC1 V
CC
= 4.0 to 5.5 V 20.0   ns External clock low width
40.0  
t
CPr
OSC1 V
CC
= 4.0 to 5.5 V   10.0 ns External clock rise time
  15.0
t
CPf
OSC1 V
CC
= 4.0 to 5.5 V   10.0 ns External clock fall time
  15.0
t
REL
RES At power-on and in
modes other than
those below
t
rc
  ms Figure 23.2 RES pin low width
In active mode and
sleep mode
operation
1500   ns