HD6433636SW datasheet(369/418 Pages) RENESAS

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355

TCSRW—Timer control/status register W

H'B4

Watchdog timer

Bit

Initial value

Read/Write

B6WI

TCWE

R/(W)*

B4WI

TCSRWE

R/(W)*

B2WI

WRST

R/(W)*

WDON

R/(W)*

B0WI

Watchdog timer reset

[Clearing conditions]

• Reset by RES pin

• When 0 is written to WRST

while writing 0 to B0WI

when TCSRWE is set to 1

[Setting condition]

When TCW overflows and

an internal reset signal is

generated

Bit 0 write disable

Writing to bit 0 enabled

Writing to bit 0 disabled

Watchdog timer on

Watchdog timer operation disabled

Watchdog timer operation enabled

Bit 2 write disable

Writing to bit 2 enabled

Writing to bit 2 disabled

Timer control/status register W write enable

Writing to bit 2 and bit 0 disabled

Writing to bit 2 and bit 0 enabled

Bit 4 write disable

Writing to bit 4 enabled

Writing to bit 4 disabled

Timer counter W write enable

Data writing to TCW disabled

Data writing to TCW enabled

Bit 6 write disable

Writing to bit 6 enabled

Writing to bit 6 disabled

Note: * Writing possible only when write condition is satisfied

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