R5F107ACMSP datasheet(80/107 Pages) RENESAS

80 / 107 page

RL78/G1C

ELECTRICAL SPECIFICATIONS (G: TA = -40 to +105

°C)

Page 80 of 135

R01DS0348EJ0100

Rev.1.00

Aug 08, 2013

3.2

Oscillator Characteristics

3.2.1

X1, XT1 oscillator characteristics

(TA =

−40 to +105°C, 2.4 V ≤ VDD ≤ 5.5 V, VSS = 0 V)

Parameter

Resonator

Conditions

MIN.

TYP.

MAX.

Unit

2.7 V

≤ VDD ≤ 5.5 V

1.0

20.0

MHz

X1 clock oscillation

frequency (fX)

Note

Ceramic resonator/

crystal resonator

2.4 V

≤ VDD < 2.7 V

1.0

16.0

MHz

XT1 clock oscillation

frequency (fXT)

Note

Crystal resonator

32.768

kHz

Note Indicates only permissible oscillator frequency ranges. Refer to AC Characteristics for instruction execution

time. Request evaluation by the manufacturer of the oscillator circuit mounted on a board to check the

oscillator characteristics.

Caution

Since the CPU is started by the high-speed on-chip oscillator clock after a reset release, check

the X1 clock oscillation stabilization time using the oscillation stabilization time counter status

the oscillation stabilization time select register (OSTS) after sufficiently evaluating the oscillation

stabilization time with the resonator to be used.

Remark

When using the X1 oscillator and XT1 oscillator, refer to 5.4 System Clock Oscillator in the RL78/G1C

User’s Manual: Hardware.

3.2.2

On-chip oscillator characteristics

(TA =

−40 to +105°C, 2.4 V ≤ VDD ≤ 5.5 V, VSS = 0 V)

Oscillators

Parameters

Conditions

MIN.

TYP.

MAX.

Unit

High-speed on-chip oscillator

clock frequency

Notes 1, 2

fHOCO

MHz

−20 to +85 °C

−1.0

+1.0

−40 to −20 °C

−1.5

+1.5

High-speed on-chip oscillator

clock frequency accuracy

+85 to +105

°C

−2.0

+2.0

Low-speed on-chip oscillator

clock frequency

fIL

kHz

Low-speed on-chip oscillator

clock frequency accuracy

−15

+15

Notes 1. High-speed on-chip oscillator frequency is selected by bits 0 to 3 of option byte (000C2H/010C2H) and

bits 0 to 2 of HOCODIV register.

2. This indicates the oscillator characteristics only. Refer to AC Characteristics for instruction execution

time.

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