4559 datasheet(142/148 Pages) RENESAS

142 / 148 page

Rev.1.04

Aug 23, 2007

Page 142 of 146

REJ03B0188-0104

4559 Group

Note 1. The frequency is affected by a capacitor, a resistor and a microcomputer. So, set the constants within the range of the frequency

limits.

Note 2. If the rising time exceeds the maximum rating value, connect a capacitor between the RESET pin and Vss at the shortest

distance, and input “L” level to RESET pin until the value of supply voltage reaches the minimum operating voltage.

Fig 82. System clock (STCK) operating condition map

Table 32 Recommended operating conditions 2 (Ta = –20

°C to 85 °C, VDD = 1.8 to 5.5 V, unless otherwise noted)

Symbol

Parameter

Conditions

Limits

Unit

Min.

Typ.

Max.

f(XIN)

Oscillation frequency

(with a ceramic resonator)

f(STCK) = f(XIN)VDD = 4.0 V to 5.5 V

MHz

VDD = 2.7 V to 5.5 V

4.4

VDD = 2 V to 5.5 V

2.2

VDD = 1.8 V to 5.5 V

1.1

f(STCK) = f(XIN)/2

VDD = 2.7 V to 5.5 V

VDD = 2 V to 5.5 V

4.4

VDD = 1.8 V to 5.5 V

2.2

f(STCK) = f(XIN)/4, f(XIN)/8

VDD = 2 V to 5.5 V

VDD = 1.8 V to 5.5 V

4.4

f(XIN)

Oscillation frequency

(with an external clock input)

f(STCK) = f(XIN)VDD = 4 V to 5.5 V

4.8

MHz

VDD = 2.7 V to 5.5 V

3.2

VDD = 2 V to 5.5 V

1.6

VDD = 1.8 V to 5.5 V

0.8

f(STCK) = f(XIN)/2

VDD = 2.7 V to 5.5 V

4.8

VDD = 2 V to 5.5 V

3.2

VDD = 1.8 V to 5.5 V

1.6

f(STCK) = f(XIN)/4, f(XIN)/8

VDD = 2 V to 5.5 V

4.8

VDD = 1.8 V to 5.5 V

3.2

f(XIN)

Oscillation frequency

(at RC oscillation) (Note 1)

VDD = 2.7 to 5.5 V

4.4

MHz

f(XCIN)

Oscillation frequency

(at quarts-crystal oscillation)

Quartz-crystal oscillator

kHz

f(CNTR)

Timer external input frequency CNTR

f(STCK)/6

tw(CNTR)

Timer external input period

(“H” and “L” pulse width)

CNTR

3/f(STCK)

TPON

Power-on reset circuit valid

supply voltage rising time

(Note 2)

VDD = 0

→ 1.8V

100

µs

1.1

2.2

4.4

1.8 2

2.7

5.5

Recommended

operating conditions

with a ceramic resonator

f(STCK)

[MHz]

VDD

[V]

0.8

1.6

3.2

4.8

1.8 2

2.7

5.5

Recommended

operating conditions

at external clock oscillation

f(STCK)

[MHz]

VDD

[V]

4.4

2.7

5.5

Recommended

operating

conditions

at RC oscillation

f(STCK)

[MHz]

VDD

[V]

1.8

5.5

Recommended

operating conditions

at quartz-crystal oscillation

f(STCK)

[kHz]

VDD

[V]

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