R7KA8M2AFDCAM datasheet(104/295 Pages) RENESAS

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SfVCC2

VPOR1

dt/dVCC

(VBAT enable case)

power on

period

operation period

power off period

(VBAT disable case)

SrVCC

SfVCC1

Figure 2.24

VCC rising and falling waveform

2.2.7

Power Supply Rise Gradient

Table 2.42

VCC_USB rise gradient characteristics at power on

Parameter

Symbol

Min

Typ

Max

Unit

Test conditions

VCC_USB rising gradient at power

SrVCC_U

8.4

—

μs/V

—

Table 2.43

VCC_USBHS and AVCC_USBHS rise gradient characteristics at power on

Parameter

Symbol

Min

Typ

Max

Unit

Test conditions

VCC_USBHS (=AVCC_USBHS)

rising gradient at power on

SrVCC_U

SBHS

8.4

—

μs/V

—

2.2.8

Thermal Characteristics

Maximum value of junction temperature (Tj) must not exceed the value of section 2.2.1. Tj/Ta Definition.

Tj is calculated by either of the following equations.

● Tj = Ta + θja × Total power consumption

● Tj = Tt + Ψjt × Total power consumption

– Tj : Junction Temperature (°C)

– Ta : Ambient Temperature (°C)

– Tt : Top Center Case Temperature (°C)

– θja : Thermal Resistance of “Junction”-to-“Ambient” (°C/W)

– Ψjt : Thermal Resistance of “Junction”-to-“Top Center Case” (°C/W)

● Total power consumption = Voltage × (Leakage current + Dynamic current)

● Leakage current of IO = Σ (IOL × VOL) /Voltage + Σ (|IOH| × |VCC – VOH|) /Voltage

● Dynamic current of IO = Σ IO (Cin + Cload) × IO switching frequency × Voltage

– Cin: Input capacitance

– Cload: Output capacitance

Regarding θja and Ψjt, see Table 2.44.

RA8M2 Datasheet

2. Electrical Characteristics

R01DS0438EJ0130 Rev.1.30

Feb 27, 2026

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