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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
0
1
Bit 6—Timer Counter W Write Enable (TCWE): Bit 6 controls writing of 8-bit data to
TCW.
Bit 6: TCWE
0
1
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
0
1
Bit 4—Timer Control/Status Register W Write Enable (TCSRWE): Bit 4 controls writing
of data to bits 2 and 0 of TCSRW.
Bit 4: TCSRWE
0
1
Bit 3—Bit 2 Write Inhibit (B2WI): Bit 3 controls writing of data to bit 2 of TCSRW.
This bit is always read as 1. Data is not stored if written to this bit.
206
Description
Writing to bit 6 is enabled
Writing to bit 6 is disabled
Description
Writing of 8-bit data to TCW is disabled
Writing of 8-bit data to TCW is enabled
Description
Writing to bit 4 is enabled
Writing to bit 4 is disabled
Description
Writing of data to bits 2 and 0 is disabled
Writing of data to bits 2 and 0 is enabled
(initial value)
(initial value)
(initial value)
(initial value)
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