4518 Datasheet, PDF (149/160 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4518 Group
RECOMMENDED OPERATING CONDITIONS 3
(Mask ROM version: Ta = –20 °C to 85 °C, VDD = 1.8 to 5.5 V, unless otherwise noted)
(One Time PROM version: Ta = –20 °C to 85 °C, VDD = 2.5 to 5.5 V, unless otherwise noted)
Symbol
Parameter
f(XIN) Oscillation frequency
(with a quartz-crystal oscillator)
f(CNTR) Timer external input frequency
tw(CNTR) Timer external input period
(“H” and “L” pulse width)
f(SCK) Serial I/O external input frequency
tw(SCK) Serial I/O external input frequency
(“H” and “L“ pulse width)
TPON Power-on reset circuit
valid supply voltage rising time
Conditions
Mask ROM version
One Time PROM version
CNTR0, CNTR1
CNTR0, CNTR1
Min.
VDD = 2.0 to 5.5 V
Limits
Typ.
Unit
Max.
50 kHz
VDD = 2.5 to 5.5 V
50
f(STCK)/6 Hz
3/f(STCK)
s
SCK
f(STCK)/6 Hz
SCK
3/f(STCK)
s
Mask ROM version
One Time PROM version
VDD = 0 → 1.8 V
VDD = 0 → 2.5 V
100 µs
100
Rev.3.01 2005.06.15 page 149 of 157
REJ03B0008-0301