SH7052 Datasheet, PDF(447/919 Page) Renesas Technology Corp – SuperHTM RISC engine

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SH7052 Datasheet, PDF (447/919 Pages) Renesas Technology Corp – SuperHTM RISC engine

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TCNT

value

H'FF

Overflow

H'00

Time

WT/IT = 1

TME = 1

H'00 written

in TCNT

WOVF = 1 WT/IT = 1

TME = 1

WDTOVF and

internal reset generated

H'00 written

in TCNT

WDTOVF

signal

Internal

reset signal*

128 Ï clocks

512 Ï clocks

WT/IT: Timer mode select bit

TME: Timer enable bit

Note: * Internal reset signal occurs only when the RSTE bit is set to 1.

Figure 12.4 Operation in Watchdog Timer Mode

421

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