Section 13
Watchdog Timer (WDT)
Rev. 0.50 May 18, 2006 Page 657 of 1588
REJ09B0313-0050
13.3.3
Watchdog Reset Control/Status Register (WRCSR)
WRCSR is an 8-bit readable/writable register that controls output of the internal reset signal
generated by watchdog timer counter (WTCNT) overflow.
WRCSR is initialized to H'1F by input of a reset signal from the
RES
pin, but is not initialized by
the internal reset signal generated by overflow of the WDT. WRCSR is initialized to H'1F in
software standby mode.
Note: The method for writing to WRCSR differs from that for other registers to prevent
erroneous writes. See section 13.3.4, Notes on Register Access, for details.
7
6
5
4
3
2
1
0
0
0
0
1
1
1
1
1
R/(W)
R/W
R/W
R
R
R
R
R
Bit:
Initial value:
R/W:
WOVF
RSTE
RSTS
-
-
-
-
-
Bit Bit
Name
Initial
Value
R/W Description
7 WOVF
0 R/(W)
Watchdog
Timer
Overflow
Indicates that the WTCNT has overflowed in
watchdog timer mode. This bit is not set in interval
timer mode.
0: No overflow
1: WTCNT has overflowed in watchdog timer mode
[Clearing condition]
•
When 0 is written to WOVF after reading WOVF
6 RSTE
0 R/W
Reset
Enable
Selects whether to generate a signal to reset the LSI
internally if WTCNT overflows in watchdog timer
mode. In interval timer mode, this setting is ignored.
0: Not reset when WTCNT overflows
*
1: Reset when WTCNT overflows
Note:
*
LSI not reset internally, but WTCNT and
WTCSR reset within WDT.
Summary of Contents for Single-Chip Microcomputer SH7203
Page 2: ...Rev 0 50 May 18 2006 Page ii of xxx ...
Page 30: ...Rev 0 50 May 18 2006 Page xxx of xxx ...
Page 52: ...Section 1 Overview Rev 0 50 May 18 2006 Page 22 of 1588 REJ09B0313 0050 ...
Page 98: ...Section 2 CPU Rev 0 50 May 18 2006 Page 68 of 1588 REJ09B0313 0050 ...
Page 128: ...Section 4 Clock Pulse Generator CPG Rev 0 50 May 18 2006 Page 98 of 1588 REJ09B0313 0050 ...
Page 200: ...Section 6 Interrupt Controller INTC Rev 0 50 May 18 2006 Page 170 of 1588 REJ09B0313 0050 ...
Page 242: ...Section 8 Cache Rev 0 50 May 18 2006 Page 212 of 1588 REJ09B0313 0050 ...
Page 400: ...Section 9 Bus State Controller BSC Rev 0 50 May 18 2006 Page 370 of 1588 REJ09B0313 0050 ...
Page 696: ...Section 13 Watchdog Timer WDT Rev 0 50 May 18 2006 Page 666 of 1588 REJ09B0313 0050 ...
Page 726: ...Section 14 Realtime Clock RTC Rev 0 50 May 18 2006 Page 696 of 1588 REJ09B0313 0050 ...
Page 876: ...Section 17 I2 C Bus Interface 3 IIC3 Rev 0 50 May 18 2006 Page 846 of 1588 REJ09B0313 0050 ...
Page 1054: ...Section 21 D A Converter DAC Rev 0 50 May 18 2006 Page 1024 of 1588 REJ09B0313 0050 ...
Page 1294: ...Section 24 LCD Controller LCDC Rev 0 50 May 18 2006 Page 1264 of 1588 REJ09B0313 0050 ...
Page 1386: ...Section 26 I O Ports Rev 0 50 May 18 2006 Page 1356 of 1588 REJ09B0313 0050 ...
Page 1512: ...Section 30 List of Registers Rev 0 50 May 18 2006 Page 1482 of 1588 REJ09B0313 0050 ...
Page 1598: ...Section 31 Electrical Characteristics Rev 0 50 May 18 2006 Page 1568 of 1588 REJ09B0313 0050 ...
Page 1606: ...Appendix Rev 0 50 May 18 2006 Page 1576 of 1588 REJ09B0313 0050 ...
Page 1618: ...Rev 0 50 May 18 2006 Page 1588 of 1588 REJ09B0313 0050 ...
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Page 1622: ...SH7203 Group Hardware Manual ...