RA4E1 datasheet(18/81 Pages) RENESAS

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Table 2.4

I/O VIH, VIL (2 of 2)

Parameter

Symbol Min

Typ Max

Unit

Schmitt trigger

input voltage

Peripheral

function pin

IIC (except for SMBus)

VIH

VCC × 0.7 —

VCC + 3.6

(max 5.8)

VIL

—

VCC × 0.3

ΔVT

VCC ×

0.05

—

5 V-tolerant ports*1 *5

VIH

VCC × 0.8 —

VCC + 3.6

(max 5.8)

VIL

—

VCC × 0.2

ΔVT

VCC ×

0.05

—

RTCIC0 When using the

Battery Backup

Function

When VBATT

power supply is

selected

VIH

VBATT ×

0.8

—

VBATT + 0.3

VIL

—

VBATT × 0.2

ΔVT

VBATT ×

0.05

—

When VCC power

supply is selected

VIH

VCC × 0.8 —

Higher

voltage either

VCC + 0.3 V

VBATT + 0.3 V

VIL

—

VCC × 0.2

ΔVT

VCC ×

0.05

—

When not using the Battery Backup

Function

VIH

VCC × 0.8 —

VCC + 0.3

VIL

—

VCC × 0.2

ΔVT

VCC ×

0.05

—

Other input pins*2

VIH

VCC × 0.8 —

—

VIL

—

VCC × 0.2

ΔVT

VCC ×

0.05

—

Ports

5 V-tolerant ports*3 *5

VIH

VCC × 0.8 —

VCC + 3.6

(max 5.8)

VIL

—

VCC × 0.2

Other input pins*4

VIH

VCC × 0.8 —

—

VIL

—

VCC × 0.2

Note 1. RES and peripheral function pins associated with Ports P205, P206, P400, P401, and P407 to P411 (total 10 pins).

Note 2. All input pins except for the peripheral function pins already described in the table.

Note 3. Ports P205, P206, P400, P401, and P407 to P411 (total 9 pins).

Note 4. All input pins except for the ports already described in the table.

Note 5. When VCC is less than 2.7 V, the input voltage of 5 V-tolerant ports should be less than 3.6 V, otherwise breakdown may occur

because 5 V-tolerant ports are electrically controlled so as not to violate the break down voltage.

RA4E1 Datasheet

2. Electrical Characteristics

R01DS0391EJ0130 Rev.1.30

Jun 6, 2025

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