RA4M2 datasheet(33/92 Pages) RENESAS

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Table 2.15

Operation frequency value in low-speed mode

Parameter

Symbol

Min

Typ

Max

Unit

Operation frequency

System clock (ICLK)

—

MHz

Peripheral module clock (PCLKA)

—

Peripheral module clock (PCLKB)

—

Peripheral module clock (PCLKC) *2

—*2

—

Peripheral module clock (PCLKD)

—

Flash interface clock (FCLK)*1

—

Note 1. Programming or erasing the flash memory is disabled in low-speed mode.

Note 2. When the ADC12 is used, the PCLKC frequency must be set to at least 1 MHz.

Table 2.16

Operation frequency value in Subosc-speed mode

Parameter

Symbol

Min

Typ

Max

Unit

Operation frequency

System clock (ICLK)

29.4

—

36.1

kHz

Peripheral module clock (PCLKA)

—

36.1

Peripheral module clock (PCLKB)

—

36.1

Peripheral module clock (PCLKC) *2

—

36.1

Peripheral module clock (PCLKD)

—

36.1

Flash interface clock (FCLK)*1

29.4

—

36.1

Note 1. Programming or erasing the flash memory is disabled in Subosc-speed mode.

Note 2. The ADC12 cannot be used.

2.3.2

Clock Timing

Table 2.17

Clock timing except for sub-clock oscillator (1 of 2)

Parameter

Symbol

Min

Typ

Max

Unit Test conditions

EXTAL external clock input cycle time

tEXcyc

41.66

—

Figure 2.7

EXTAL external clock input high pulse width

tEXH

15.83

—

EXTAL external clock input low pulse width

tEXL

15.83

—

EXTAL external clock rise time

tEXr

—

5.0

EXTAL external clock fall time

tEXf

—

5.0

Main clock oscillator frequency

fMAIN

—

MHz —

Main clock oscillation stabilization wait time (crystal)*1

tMAINOSCWT —

—

—*1

Figure 2.8

LOCO clock oscillation frequency

fLOCO

29.4912 32.768 36.0448 kHz —

LOCO clock oscillation stabilization wait time

tLOCOWT

—

60.4

µs

Figure 2.9

ILOCO clock oscillation frequency

fILOCO

13.5

16.5

kHz —

MOCO clock oscillation frequency

FMOCO

6.8

9.2

MHz —

MOCO clock oscillation stabilization wait time

tMOCOWT

—

15.0

µs

—

RA4M2 Datasheet

2. Electrical Characteristics

R01DS0367EJ0110 Rev.1.10

Jan 27, 2021

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