4552 Datasheet, PDF (128/145 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4552 Group
RECOMMENDED OPERATING CONDITIONS 2
(Mask ROM version: Ta = –20 °C to 85 °C, VDD = 1.8 to 5.5 V, unless otherwise noted)
Symbol
Parameter
f(XIN) Oscillation frequency
(with a ceramic resonator)
f(XIN)
f(XIN)
Oscillation frequency
(at RC oscillation) (Note)
Oscillation frequency
(with a ceramic oscillation selected,
external clock input)
f(XCIN) Oscillation frequency (sub-clock)
f(CNTR) Timer external input frequency
tw(CNTR) Timer external input period
(“H” and “L” pulse width)
TPON Power-on reset circuit
valid supply voltage rising time
Through mode
Conditions
Frequency/2 mode
Frequency/4 mode
Frequency/8 mode
VDD = 2.7 to 5.5 V
Through mode
Frequency/2 mode
Frequency/4 mode
Frequency/8 mode
Quartz-crystal oscillator
CNTR
CNTR
VDD = 0 → 1.8 V
Min.
VDD = 4 to 5.5 V
VDD = 2.7 to 5.5 V
VDD = 2 to 5.5 V
VDD = 1.8 to 5.5 V
VDD = 2.7 to 5.5 V
VDD = 2 to 5.5 V
VDD = 1.8 to 5.5 V
VDD = 2 to 5.5 V
VDD = 1.8 to 5.5 V
VDD = 1.8 to 5.5 V
Limits
Typ.
Max.
6
4.4
2.2
1.1
6
4.4
2.2
6
4.4
6
4.4
Unit
MHz
MHz
VDD = 4 to 5.5 V
VDD = 2.7 to 5.5 V
VDD = 2 to 5.5 V
VDD = 1.8 to 5.5 V
VDD = 2.7 to 5.5 V
VDD = 2 to 5.5 V
VDD = 1.8 to 5.5 V
VDD = 2 to 5.5 V
VDD = 1.8 to 5.5 V
VDD = 1.8 to 5.5 V
3/f(STCK)
4.8 MHz
3.2
1.6
0.8
4.8
3.2
1.6
4.8
3.2
4.8
50 kHz
f(STCK)/6 Hz
s
100 µs
Note: The frequency is affected by a capacitor, a resistor and a microcomputer. So, set the constants within the range of the frequency limits.
Rev.3.02 Dec 22, 2006 page 128 of 142
REJ03B0023-0302