R7F100LLL3CFB datasheet(104/148 Pages) RENESAS

104 / 148 page

RL78/L23

2. Electrical Characteristics

R01DS0502EJ0110 Rev.1.10

Page 104 of 145

Oct 31, 2025

9. In simplified SPI (CSI) communications in the slave mode with devices operating at different voltage levels (1.8 V,

2.5 V, or 3 V) with the external SCKp clock

(Notes and Caution are listed on the next page, and Remarks are listed on page 106.)

(TA = -40 to +105°C, 1.8 V ≤ VDD ≤ 5.5 V, VSS = EVSS = 0 V)

(1/2)

Item

Symbols

Conditions

(high-speed main)

mode

(low-speed main)

mode

(low-power main)

mode

Unit

Min.

Max.

Min.

Max.

Min.

Max.

SCKp cycle

timeNote 1

tKCY2

4.0 V ≤ VDD ≤ 5.5 V,

2.7 V ≤ Vb ≤ 4.0 V

24 MHz < fMCK

14/fMCK

——

20 MHz < fMCK ≤ 24 MHz 12/fMCK

12/fMCK

—ns

8 MHz < fMCK ≤ 20 MHz

10/fMCK

—ns

4 MHz < fMCK ≤ 8 MHz

8/fMCK

—ns

fMCK ≤ 4 MHz

6/fMCK

10/fMCK

2.7 V ≤ VDD < 4.0 V,

2.3 V ≤ Vb ≤ 2.7 V

24 MHz < fMCK

20/fMCK

——

20 MHz < fMCK ≤ 24 MHz 16/fMCK

16/fMCK

—ns

16 MHz < fMCK ≤ 20 MHz 14/fMCK

14/fMCK

—ns

8 MHz < fMCK ≤ 16 MHz

12/fMCK

—ns

4 MHz < fMCK ≤ 8 MHz

8/fMCK

—ns

fMCK ≤ 4 MHz

6/fMCK

10/fMCK

1.8 V ≤ VDD < 3.3 V,

1.6 V ≤ Vb ≤ 2.0 V

Note 2

24 MHz < fMCK

48/fMCK

——

20 MHz < fMCK ≤ 24 MHz 36/fMCK

36/fMCK

—ns

16 MHz < fMCK ≤ 20 MHz 32/fMCK

32/fMCK

—ns

8 MHz < fMCK ≤ 16 MHz

26/fMCK

—ns

4 MHz < fMCK ≤ 8 MHz

16/fMCK

—ns

fMCK ≤ 4 MHz

10/fMCK

R7F100LLL3CFB Datasheet(PDF) 104 Page - Renesas Technology Corp

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