R5F104FCAFP datasheet(53/207 Pages) RENESAS

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RL78/G13

2. ELECTRICAL SPECIFICATIONS (TA = –40 to +85°C)

R01DS0131EJ0350 Rev.3.50

53 of 200

Jun 30, 2020

2.2 Oscillator Characteristics

2.2.1 X1, XT1 oscillator characteristics

(TA = –40 to +85°C, 1.6 V

≤ VDD ≤ 5.5 V, VSS = 0 V)

Parameter

Resonator

Conditions

MIN.

TYP.

MAX.

Unit

X1 clock oscillation

frequency (fX)Note

Ceramic resonator/

crystal resonator

2.7 V

≤ VDD ≤ 5.5 V

1.0

20.0

MHz

2.4 V

≤ VDD < 2.7 V

1.0

16.0

MHz

1.8 V

≤ VDD < 2.4 V

1.0

8.0

MHz

1.6 V

≤ VDD < 1.8 V

1.0

4.0

MHz

XT1 clock oscillation

frequency (fX)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 register (OSTC)

by the user. Determine the oscillation stabilization time of the OSTC register and 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/G13 User’s

Manual.

2.2.2 On-chip oscillator characteristics

(TA = –40 to +85°C, 1.6 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

fIH

MHz

High-speed on-chip oscillator

clock frequency accuracy

–20 to +85°C

1.8 V

≤ VDD ≤ 5.5 V

–1.0

+1.0

1.6 V

≤ VDD < 1.8 V

–5.0

+5.0

–40 to –20°C

1.8 V

≤ VDD ≤ 5.5 V

–1.5

+1.5

1.6 V

≤ VDD < 1.8 V

–5.5

+5.5

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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