S7G2 datasheet(49/117 Pages) RENESAS

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R01DS0262EU0150 Rev.1.50

Page 49 of 117

Sep 24, 2025

S7G2 Datasheet

2. Electrical Characteristics

Note 1. The recovery time is determined by the system clock source. When multiple oscillators are active, the recovery

time can be determined with the following equation:

Total recovery time = recovery time for an oscillator as the system clock source + the longest oscillation

stabilization time of any oscillators requiring longer stabilization times than the system clock source + 2 LOCO

cycles (when LOCO is operating) + 3 SOSC cycles (when Subosc is oscillating and MSTPC0 = 0 (CAC module

stop)).

Note 2. When the frequency of the crystal is 24 MHz (Main Clock Oscillator Wait Control Register (MOSCWTCR) is set to

05h). For other settings (MOSCWTCR is set to Xh), the recovery time can be determined with the following

equation:

tSBYMC (MOSCWTCR = Xh) = tSBYMC (MOSCWTCR = 05h) + (tMAINOSCWT (MOSCWTCR = Xh) - tMAINOSCWT

(MOSCWTCR = 05h))

Note 3. When the frequency of PLL is 240 MHz (Main Clock Oscillator Wait Control Register (MOSCWTCR) is set to

05h). For other settings (MOSCWTCR is set to Xh), the recovery time can be determined with the following

equation:

tSBYMC (MOSCWTCR = Xh) = tSBYMC (MOSCWTCR = 05h) + (tMAINOSCWT (MOSCWTCR = Xh) - tMAINOSCWT

(MOSCWTCR = 05h))

Note 4. When the frequency of the external clock is 24 MHz (Main Clock Oscillator Wait Control Register (MOSCWTCR)

is set to 00h). For other settings (MOSCWTCR is set to Xh), the recovery time can be determined with the

following equation:

tSBYMC (MOSCWTCR = Xh) = tSBYMC (MOSCWTCR = 00h) + (tMAINOSCWT (MOSCWTCR = Xh) - tMAINOSCWT

(MOSCWTCR = 00h))

Note 5. When the frequency of PLL is 240 MHz (Main Clock Oscillator Wait Control Register (MOSCWTCR) is set to

00h). For other settings (MOSCWTCR is set to Xh), the recovery time can be determined with the following

equation:

tSBYMC (MOSCWTCR = Xh) = tSBYMC (MOSCWTCR = 00h) + (tMAINOSCWT (MOSCWTCR = Xh) - tMAINOSCWT

(MOSCWTCR = 00h))

Note 6. The HOCO frequency is 20 MHz.

Note 7. The MOCO frequency is 8 MHz.

Note 8. In Subosc-speed mode, the sub-clock oscillator or LOCO continues oscillating in Software Standby mode.

Note 9. When the SNZCR.RXDREQEN bit is set to 0, 86 μs is added as the power supply recovery time.

Note 10. This defines the duration of Normal mode after a transition from Snooze to Normal mode.

The following cases are valid uses of the main clock oscillator:

- The crystal resonator is connected to main clock oscillator

- The external clock is input to main clock oscillator.

The following cases are excluded:

- The main clock resonator is not connected to the system clock source

- Transition is made from Software Standby to Normal mode.

Note 11. The same value as set in MOSCWTCR.MSTS[3:0]. Duration of Normal mode must be longer than the main clock

oscillator wait time.

MOSCWTCR: Main Clock Oscillator Wait Control Register

tcycmosc: Main clock oscillator frequency cycle.

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