4501_M Datasheet, PDF (173/212 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES

4501 Group
APPENDIX
3.1 Electrical characteristics
Table 3.1.3 Recommended operating conditions 2
(Ta = –20 °C to 85 °C, VDD = 2.7 to 5.5 V, unless otherwise noted)
Symbol
Parameter
Conditions
f(XIN)
Oscillation frequency
(with a ceramic resonator/
RC oscillation) (Note)
f(XIN)
Oscillation frequency
(with a ceramic resonator selected,
external clock input)
∆ f(XIN)
f(CNTR)
Oscillation frequency error
(at RC oscillation, error value of
exteranal R, C not included)
Note: use 30 pF capacitor and vary external R
Timer external input frequency
tw(CNTR) Timer external input period
(“H” and “L” pulse width)
TPON
Valid supply voltage rising time for
power-on reset circuit
High-speed mode
Middle-speed mode
Low-speed mode
Default mode
High-speed mode
Middle-speed mode
Low-speed mode
Default mode
VDD = 5.0 V ±10 %,
Ta = 25 °C, –20 to 85 °C
High-speed mode
Middle-speed mode
Low-speed mode
Default mode
High-speed mode
Middle-speed mode
Low-speed mode
Default mode
VDD = 0 → 2.0 V
Limits
Unit
Min. Typ. Max.
4.4 MHz
3.2 MHz
±17 %
3/f(XIN)
6/f(XIN)
12/f(XIN)
24/f(XIN)
f(XIN)/6 Hz
f(XIN)/12
f(XIN)/24
f(XIN)/48
s
100 µs
Note: The frequency at RC oscillation is affected by a capacitor, a resistor and a microcomputer. So, set the constants within the range of the frequency limits.
Rev.2.01 Feb 07, 2005
3-4
REJ09B0192-0201