S124 datasheet(48/107 Pages) RENESAS

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R01DS0264EU0140 Rev.1.40

Page 48 of 107

Sep 3, 2024

S124 Datasheet

2. Electrical Characteristics

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. The 48-MHz HOCO can be used within a VCC range of 1.8 V to 5.5 V.

Note 4. The 64-MHz HOCO can be used within a VCC range of 2.4 V to 5.5 V.

Note 5. This is a characteristic when the HOCOCR.HCSTP bit is cleared to 0 (oscillation) in the MOCO stop state.

When the HOCOCR.HCSTP bit is cleared to 0 (oscillation) during MOCO oscillation, this specification is

shortened by 1 μs.

Note 6. Check OSCSF.HOCOSF to confirm whether stabilization time has elapsed.

Figure 2.25

EXTAL external clock input timing

Figure 2.26

LOCO clock oscillation start timing

Figure 2.27

HOCO clock oscillation start timing (started by setting the HOCOCR.HCSTP bit)

Figure 2.28

Sub-clock oscillation start timing

Sub-clock oscillation stabilization time*2

tSUBOSC

-0.5

-s

Figure 2.28

Table 2.22

Clock timing (2 of 2)

Parameter

Symbol

Min

Typ

Max

Unit

Test conditions

tXH

tXcyc

EXTAL external clock input

VCC × 0.5

tXL

tXr

tXf

LOCO clock oscillator output

LOCOCR.LCSTP

tLOCO

HOCO clock

HOCOCR.HCSTP

tHOCOx

Note 1.

x = 24, 32, 48, 64

Sub-clock oscillator output

SOSCCR.SOSTP

tSUBOSC

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