RX72N datasheet(96/179 Pages) RENESAS

96 / 179 page

R01DS0343EJ0120 Rev.1.20

Page 96 of 179

Nov 15, 2023

RX72N Group

2. Electrical Characteristics

Figure 2.10

PLL/PPLL Clock Oscillation Start Timing

Note 1. When using a sub-clock, ask the manufacturer of the oscillator to evaluate its oscillation. Refer to the results of evaluation

provided by the manufacturer for the oscillation stabilization time.

Note 2. The number of cycles selected by the value of the SOSCWTCR.SSTS[7:0] bits determines the sub-clock oscillation stabilization

wait time in accord with the formula below.

tSUBOSCWT = [(SSTS[7:0] bits × 16384) + 10] / fLOCO

Figure 2.11

Sub-Clock Oscillation Start Timing

Table 2.19

PLL/PPLL Clock Timing

Conditions: VCC = AVCC0 = AVCC1 = VCC_USB = VBATT = 2.7 to 3.6 V, 2.7 V ≤ VREFH0 ≤ AVCC0,

VSS = AVSS0 = AVSS1 = VREFL0 = VSS_USB = 0 V,

Ta = Topr

Item

Symbol

Min.

Typ.

Max.

Unit

Test

Conditions

PLL/PPLL clock oscillation frequency

fPLL

120

—

240

MHz

PLL/PPLL clock oscillation stabilization wait time

tPLLWT

—

259

320

µs

Figure 2.10

Table 2.20

Sub-Clock Timing

Conditions: VCC = AVCC0 = AVCC1 = VCC_USB = 2.7 to 3.6 V, 2.7 V ≤ VREFH0 ≤ AVCC0,

VSS = AVSS0 = AVSS1 = VREFL0 = VSS_USB = 0 V,

VBATT = 1.62 to 3.6 V, Ta = Topr

Item

Symbol

Min.

Typ.

Max.

Unit

Test

Conditions

Sub-clock oscillation frequency

fSUB

—

32.768

—

kHz

Sub-clock oscillation stabilization time

tSUBOSC

——

Figure 2.11

Sub-clock oscillation stabilization wait time

tSUBOSCWT

——

PLLCR2.PLLEN

PPLLCR2.PPLLEN

OSCOVFSR.PLOVF

OSCOVFSR.PPLOVF

PLL/PPLL clock

tPLLWT

PLL/PPLL circuit output

Sub-clock oscillator output

SOSCCR.SOSTP

tSUBOSC

Sub-clock

OSCOVFSR.SOOVF

tSUBOSCWT

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