Rev.1.04
REJ03B0188-0104
Aug 23, 2007
Page 142 of 146
4559 Group
Note 1. The frequency is affected by a capacitor, a resistor and a microcomputer. So, set the constants within the range of the frequency
limits.
Note 2. If the rising time exceeds the maximum rating value, connect a capacitor between the RESET pin and Vss at the shortest
distance, and input “L” level to RESET pin until the value of supply voltage reaches the minimum operating voltage.
Fig 82. System clock (STCK) operating condition map
Table 32 Recommended operating conditions 2 (Ta = –20
°
C to 85
°
C, V
DD
= 1.8 to 5.5 V, unless otherwise noted)
Symbol
Parameter
Conditions
Limits
Typ.
Unit
Min.
Max.
6
4.4
2.2
1.1
6
4.4
2.2
6
4.4
4.8
3.2
1.6
0.8
4.8
3.2
1.6
4.8
3.2
4.4
f(X
IN
)
Oscillation frequency
(with a ceramic resonator)
f(STCK) = f(X
IN
)
V
DD
= 4.0 V to 5.5 V
V
DD
= 2.7 V to 5.5 V
V
DD
= 2 V to 5.5 V
V
DD
= 1.8 V to 5.5 V
V
DD
= 2.7 V to 5.5 V
V
DD
= 2 V to 5.5 V
V
DD
= 1.8 V to 5.5 V
V
DD
= 2 V to 5.5 V
V
DD
= 1.8 V to 5.5 V
V
DD
= 4 V to 5.5 V
V
DD
= 2.7 V to 5.5 V
V
DD
= 2 V to 5.5 V
V
DD
= 1.8 V to 5.5 V
V
DD
= 2.7 V to 5.5 V
V
DD
= 2 V to 5.5 V
V
DD
= 1.8 V to 5.5 V
V
DD
= 2 V to 5.5 V
V
DD
= 1.8 V to 5.5 V
MHz
f(STCK) = f(X
IN
)/2
f(STCK) = f(X
IN
)/4, f(X
IN
)/8
f(X
IN
)
Oscillation frequency
(with an external clock input)
f(STCK) = f(X
IN
)
MHz
f(STCK) = f(X
IN
)/2
f(STCK) = f(X
IN
)/4, f(X
IN
)/8
f(X
IN
)
Oscillation frequency
(at RC oscillation) (Note 1)
Oscillation frequency
(at quarts-crystal oscillation)
Timer external input frequency CNTR
Timer external input period
(“H” and “L” pulse width)
Power-on reset circuit valid
supply voltage rising time
(Note 2)
V
DD
= 2.7 to 5.5 V
MHz
f(X
CIN
)
Quartz-crystal oscillator
50
kHz
f(CNTR)
tw(CNTR)
f(STCK)/6
Hz
s
CNTR
3/f(STCK)
T
PON
V
DD
= 0
→
1.8V
100
μ
s
1.1
2.2
4.4
6
1.8 2
2.7
4
5.5
Recommended
operating conditions
with a ceramic resonator
f(STCK)
[MHz]
V
DD
[V]
0.8
1.6
3.2
4.8
1.8 2
2.7
4
5.5
Recommended
operating conditions
at external clock oscillation
f(STCK)
[MHz]
V
DD
[V]
4.4
2.7
5.5
Recommended
operating
conditions
at RC oscillation
f(STCK)
[MHz]
V
DD
[V]
50
1.8
5.5
Recommended
operating conditions
at quartz-crystal oscillation
f(STCK)
[kHz]
V
DD
[V]