RA4T1 datasheet(77/89 Pages) RENESAS

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Appendix 1.

Port States in Each Processing Mode

Function

Pin function

Reset

Software Standby mode

Deep Software

Standby mode

After Deep Software Standby

mode is canceled (return to

startup mode)

IOKEEP = 0

IOKEEP = 1*1

Mode

Pull-up

Keep-O

Keep

Hi-Z

Keep

IRQ

IRQx

Hi-Z

Keep-O*2

Keep

Hi-Z

Keep

IRQx-DS

Hi-Z

Keep-O*2

Keep*3

Hi-Z

Keep

AGT

AGTIOn

Hi-Z

Keep-O*2

Keep

Hi-Z

Keep

AGTIOn (n = 1)

Hi-Z

Keep-O*2

Keep*3

Hi-Z

Keep

SCI

RXD0

Hi-Z

Keep-O*2

Keep

Hi-Z

Keep

I3C

I3C_SCL/I3C_SDA

SCLn/SDAn

Hi-Z

Keep-O*2

Keep

Hi-Z

Keep

CLKOUT

Hi-Z

[CLKOUT selected] CLKOUT output

Keep

Hi-Z

Keep

DAC

DAn

Hi-Z

[DAn output (DAOE = 1)] D/A output retained

Keep

Hi-Z

Keep

ACMPHS

VCOUT

Hi-Z

VCOUT output

Keep

Hi-Z

Keep

Others

—

Hi-Z

Keep-O

Keep

Hi-Z

Keep

Note:

H: High-level

L: Low-level

Hi-Z: High-impedance

Keep-O: Output pins retain their previous values. Input pins go to high-impedance.

Keep: Pin states are retained during periods in Software Standby mode.

Note 1. Retains the I/O port state until the DPSBYCR.IOKEEP bit is cleared to 0.

Note 2. Input is enabled if the pin is specified as the Software Standby canceling source while it is used as an external interrupt pin.

Note 3. Input is enabled if the pin is specified as the Deep Software Standby canceling source.

RA4T1 Datasheet

Appendix 1. Port States in Each Processing Mode

R01DS0415EJ0140 Rev.1.40

May 29, 2026

Page 77 of 89

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