4554 Datasheet, PDF (130/138 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4554 Group
RECOMMENDED OPERATING CONDITIONS 2
(Mask ROM version: Ta = –20 °C to 85 °C, VDD = 2 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 ceramic resonator)
f(XIN)
f(XIN)
Oscillation frequency
(at RC oscillation) (Note)
Oscillation frequency
(with a ceramic resonator 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
Mask ROM
Conditions
Min.
Through mode
VDD = 4 to 5.5 V
version
VDD = 2.7 to 5.5 V
VDD = 2 to 5.5 V
Frequency/2 mode VDD = 2.7 to 5.5 V
VDD = 2 to 5.5 V
Frequency/4, 8 mode VDD = 2 to 5.5 V
One Time PROM Through mode
VDD = 4 to 5.5 V
version
VDD = 2.7 to 5.5 V
VDD = 2.5 to 5.5 V
Frequency/2 mode VDD = 2.7 to 5.5 V
VDD = 2.5 to 5.5 V
Frequency/4, 8 mode VDD = 2.5 to 5.5 V
VDD = 2.7 to 5.5 V
Limits
Typ.
Max.
6
4.4
2.2
6
4.4
6
6
4.4
2.2
6
4.4
6
4.4
Unit
MHz
MHz
Mask ROM
Through mode
VDD = 4 to 5.5 V
version
VDD = 2.7 to 5.5 V
VDD = 2 to 5.5 V
Frequency/2 mode VDD = 2.7 to 5.5 V
VDD = 2 to 5.5 V
Frequency/4, 8 mode VDD = 2 to 5.5 V
One Time PROM Through mode
VDD = 4 to 5.5 V
version
VDD = 2.7 to 5.5 V
VDD = 2.5 to 5.5 V
Frequency/2 mode VDD = 2.7 to 5.5 V
VDD = 2.5 to 5.5 V
Frequency/4, 8 mode VDD = 2.5 to 5.5 V
Quartz-crystal oscillator
CNTR0, CNTR1
CNTR0, CNTR1
3/f(STCK)
4.8 MHz
3.2
1.6
4.8
3.2
4.8
4.8
3.2
1.6
4.8
3.2
4.8
50 kHz
f(STCK)/6 Hz
s
Mask ROM version
One Time PROM version
VDD = 0 → 2 V
VDD = 0 → 2.5 V
100 µs
100
Note: The frequency is affected by a capacitor, a resistor and a microcomputer. So, set the constants within the range of the frequency limits.
<System clock (STCK) Operating condition map>
➀ When ceramic resonator is used.
f(STCK)
[MHz]
6
➁ When RC oscillation is used.
f(STCK)
[MHz]
➂ When external clock is used.
f(STCK)
[MHz]
4.8
4.4
4.4
Recommended
operating
2.2
condition
3.2
Recommended
operating
condition
1.6
Recommended
operating
condition
VDD
2
2.7
4
5.5 [V]
(2.5)
VDD
2.7
5.5 [V]
VDD
2
2.7
4
5.5 [V]
(2.5)
Rev.3.00 Aug 06, 2004 page 130 of 136
REJ03B0043-0300Z