HD6433636SW datasheet(222/418 Pages) RENESAS

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208

9.6.2

Timer Control/Status Register W (TCSRW)

Bit

76543210

B6WI

TCWE

B4WI

TCSRWE

B2WI

WDON

BOWI

WRST

Initial value

10101010

Read/Write

R/(W)*

Note: * Can be written to only when the write condition is satisfied. For the write conditions, see the

individual bit descriptions.

Timer control/status register W (TCSRW) is an 8-bit read/write register that performs

TCSRW and TCW write control and watchdog timer operation control, and indicates the

operation status.

Bit 7—Bit 6 Write Inhibit (B6WI): Bit 7 controls writing of data to bit 6 of TCSRW.

This bit is always read as 1. Data is not stored if written to this bit.

Bit 7: B6WI

Description

Writing to bit 6 is enabled

Writing to bit 6 is disabled

(initial value)

Bit 6—Timer Counter W Write Enable (TCWE): Bit 6 controls writing of 8-bit data to

TCW.

Bit 6: TCWE

Description

Writing of 8-bit data to TCW is disabled

(initial value)

Writing of 8-bit data to TCW is enabled

Bit 5—Bit 4 Write Inhibit (B4WI): Bit 5 controls writing of data to bit 4 of TCSRW.

This bit is always read as 1. Data is not stored if written to this bit.

Bit 5: B4WI

Description

Writing to bit 4 is enabled

Writing to bit 4 is disabled

(initial value)

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