Register Descriptions - Renesas F-ZTAT H8 Series Hardware Manual

8-bit single-chip microcomputer

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Register Descriptions

Timer Control/Status Register W (TCSRW)

Initial value

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

individual bit descriptions.

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.

Writing to bit 6 is enabled

Writing to bit 6 is disabled

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

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

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.

Writing to bit 4 is enabled

Writing to bit 4 is disabled

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

Rev.3.00 Jul. 19, 2007 page 243 of 532

(initial value)

REJ09B0397-0300