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Table 2.21

Clock timing (2 of 2)

Parameter

Symbol

Min

Typ

Max

Unit

Test conditions

—

1.6 ≤ VCC < 1.8

Main clock oscillator oscillation frequency

fMAIN

—

MHz

1.8 ≤ VCC ≤ 5.5

—

1.6 ≤ VCC < 1.8

LOCO clock oscillation frequency

fLOCO

27.8528

32.768

37.6832

kHz

—

LOCO clock oscillation stabilization time

tLOCO

—

100

µs

Figure 2.4

IWDT-dedicated clock oscillation frequency

fILOCO

12.75

17.25

kHz

—

MOCO clock oscillation frequency

fMOCO

6.8

9.2

MHz

—

MOCO clock oscillation stabilization time

tMOCO

—

µs

—

HOCO clock oscillation frequency*5

fHOCO24

23.76

24.24

MHz

Ta = -40 to 105°C

1.6 ≤ VCC ≤ 5.5

fHOCO32

31.68

32.32

Ta = -40 to 105°C

1.6 ≤ VCC ≤ 5.5

fHOCO48

47.52

48.48

Ta = -40 to 105°C

1.6 ≤ VCC ≤ 5.5

fHOCO64

63.36

64.64

Ta = -40 to 105°C

1.6 ≤ VCC ≤ 5.5

HOCO clock oscillation stabilization time*3 *4

tHOCO24

tHOCO32

tHOCO48

tHOCO64

—

1.9

—

µs

Figure 2.5

Sub-clock oscillator oscillation frequency

fSUB

—

32.768

—

kHz

—

Sub-clock oscillation stabilization time*2

tSUBOSC

—

0.5

—

Figure 2.6

Note 1. Time until the clock can be used after the Main Clock Oscillator stop bit (MOSCCR.MOSTP) is set to 0 (operating) when the

external clock is stable.

Note 2. After changing the setting of the SOSCCR.SOSTP bit to start sub-clock oscillator operation, only start using the sub-clock oscillator

after the sub-clock oscillation stabilization wait time elapsed. Use the oscillator wait time value recommended by the oscillator

manufacturer.

Note 3. This is a characteristic when the HOCOCR.HCSTP bit is set to 0 (oscillation) in the MOCO stop state. When the HOCOCR.HCSTP

bit is set to 0 (oscillation) during MOCO oscillation, this specification is shortened by 1 µs.

Note 4. Check OSCSF.HOCOSF to confirm whether stabilization time has elapsed.

Note 5. Accuracy at production test.

tXH

tXcyc

EXTAL external clock input

VCC × 0.5

tXL

tXr

tXf

Figure 2.3

EXTAL external clock input timing

RA2L1 Datasheet

2. Electrical Characteristics

R01DS0385EJ0160 Rev.1.60

Oct 14, 2025

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