4501 datasheet(106/116 Pages) RENESAS

106 / 116 page

Rev.3.01

2005.02.07

page 106 of 112

REJ03B0104-0301

4501 Group

f(XIN)

∆ f(XIN)

f(CNTR)

tw(CNTR)

TPON

Oscillation frequency

(with a ceramic resonator/

RC oscillation) (Note)

Oscillation frequency

(with a ceramic resonator selected,

external clock input)

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

Timer external input period

(“H” and “L” pulse width)

Valid supply voltage rising time for

power-on reset circuit

Conditions

MHz

µs

Max.

4.4

3.2

±17

f(XIN)/6

f(XIN)/12

f(XIN)/24

f(XIN)/48

100

Limits

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

Min.

Typ.

3/f(XIN)

6/f(XIN)

12/f(XIN)

24/f(XIN)

Parameter

Symbol

Unit

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.

Recommended operating conditions 2

(Ta = –20 °C to 85 °C, VDD = 2.7 to 5.5 V, unless otherwise noted)

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