RA4E2 datasheet(54/90 Pages) RENESAS

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Table 2.32

I3C timing (open drain timing parameters)

Conditions: VCC = 3.00 to 3.60 V

Setting of the I3C_SDA, I3C_SCL pins is not required with the Port Drive Capability bit in the PmnPFS register.

Parameter

Symbol

Min

Max

Unit

Test

conditions

I3C

Open Drain

Timing

Parameters

SCL Clock Low Period

tLOW_OD

*1 *2

200

—

Figure 2.45

tDIG_OD_L tLOW_ODmin + tfDA_ODmin —

Figure 2.45

SCL Clock High Period

tHIGH*3 *4 —

Figure 2.43

tDIG_H

—

tHIGH + tCF

Figure 2.43

SDA Signal Fall Time

tfDA_OD

tCF

Figure 2.45

SDA Data Setup Time Open

Drain Mode

tSU_OD*1

—

Figure 2.44

Clock After START (S) Condition tCAS*5 *6 38.4 nano

For ENAS0: 1 µ

seconds

Figure 2.45

For ENAS1: 100

For ENAS2: 2

milli

For ENAS3: 50

milli

Clock Before STOP (P)

Condition

tCBP

tCASmin / 2

—

seconds

Figure 2.46

Current Master to Secondary

Master Overlap time during

handoff

tMMOverla

tDIG_OD_Lmin

—

Figure 2.51

Bus Available Condition

tAVAL*7

—

µs

—

Bus Idle Condition

tIDLE

—

Time Internal Where New

Master Not Driving SDA Low

tMMLock

tAVALmin

—

µs

Figure 2.51

Note 1. This is approximately equal to tLOWmin + tDS_ODmin + trDA_ODtyp + tSU_Odmin.

Note 2. The Master may use a shorter Low period if it knows that this is safe, i.e., that SDA is already above VIH

Note 3. Based on tSPIKE, rise and fall times, and interconnect

Note 4. This maximum High period may be exceeded when the signals can be safely seen by Legacy I2C Devices, and/or in consideration

of the interconnect (e.g., a short Bus).

As a product specification, if this Max value cannot be guaranteed, change this Max value and specify that it cannot be used in the

Mixed Bus.

Note 5. On a legacy bus where I2C devices need to see Start

Note 6. Slaves that do not support the optional ENTASx CCCs shall use the tCAS Max value shown for ENTAS3

Note 7. On a mixed bus with Fm Legacy I2C Devices, tAVAL is 300 ns shorter than the Fm Bus Free Condition time (tBUF)

RA4E2 Datasheet

2. Electrical Characteristics

R01DS0413EJ0110 Rev.1.10

Feb 28, 2023

Page 54 of 90

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