R5F11BBC datasheet(83/143 Pages) RENESAS

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RL78/G1F

3. ELECTRICAL SPECIFICATIONS (G: TA = -40 to +105°C)

R01DS0246EJ0110 Rev. 1.10

Page 83 of 140

Aug 12, 2016

3.2

Oscillator Characteristics

3.2.1

X1, XT1 characteristics

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

Remark

When using the X1 oscillator and XT1 oscillator, refer to 5.4 System Clock Oscillator in the RL78/G1F User’s Manual.

3.2.2

On-chip oscillator characteristics

Note 1.

High-speed on-chip oscillator frequency is selected with bits 0 to 4 of the option byte (000C2H/010C2H) and bits 0 to 2 of

the HOCODIV register.

Note 2.

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

(TA = -40 to +105°C, 2.4 V

≤ EVDD0 = VDD ≤ 5.5 V, VSS = 0 V)

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

XT1 clock oscillation frequency (fXT) Note

Crystal resonator

32.768

kHz

(TA = -40 to +105°C, 2.4 V

≤ EVDD0 = 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

2.7 V

≤ VDD ≤ 5.5 V

132

MHz

2.4 V

≤ VDD < 2.7 V

116

MHz

High-speed on-chip oscillator clock frequency

accuracy

TA = +85 to +105°C

-2

TA = -20 to +85°C

-1

TA = -40 to -20°C

-1.5

1.5

Low-speed on-chip oscillator clock frequency

fIL

kHz

Low-speed on-chip oscillator clock frequency

accuracy

-15

+15

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