Section 12
Watchdog Timer (WDT)
Rev.2.00 Jun. 28, 2007 Page 441 of 666
REJ09B0311-0200
12.3.3 Reset
Control/Status Register (RSTCSR)
RSTCSR controls the generation of the internal reset signal when TCNT overflows, and selects
the type of internal reset signal. RSTCSR is initialized to H'1F by a reset signal from the
RES
pin,
but not by the WDT internal reset signal caused by WDT overflows.
7
WOVF
0
R/(W)
*
6
RSTE
0
R/W
5
0
R/W
4
1
R
3
1
R
2
1
R
1
1
R
0
1
R
Bit
Bit Name
Initial Value
R/W
Note:
*
Only 0 can be written to this bit, to clear the flag.
Bit Bit
Name
Initial
Value R/W Description
7 WOVF
0 R/(W)
*
Watchdog Timer Overflow Flag
This bit is set when TCNT overflows in watchdog timer
mode. This bit cannot be set in interval timer mode, and
only 0 can be written.
[Setting condition]
When TCNT overflows (changed from H'FF to H'00) in
watchdog timer mode
[Clearing condition]
Reading RSTCSR when WOVF = 1, and then writing 0 to
WOVF
6 RSTE
0 R/W
Reset
Enable
Specifies whether or not this LSI is internally reset if
TCNT overflows during watchdog timer operation.
0: LSI is not reset even if TCNT overflows (Though this
LSI is not reset, TCNT and TCSR in WDT are reset)
1: LSI is reset if TCNT overflows
5
0 R/W
Reserved
Although this bit is readable/writable, reading from or
writing to this bit does not affect operation.
4 to 0
All
1
R
Reserved
These are read-only bits and cannot be modified.
Note:
*
Only 0 can be written to this bit, to clear the flag.
Содержание H8SX/1650
Страница 2: ...Rev 2 00 Jun 28 2007 Page ii of xxii...
Страница 106: ...Section 4 Exception Handling Rev 2 00 Jun 28 2007 Page 84 of 666 REJ09B0311 0200...
Страница 142: ...Section 5 Interrupt Controller Rev 2 00 Jun 28 2007 Page 120 of 666 REJ09B0311 0200...
Страница 326: ...Section 8 I O Ports Rev 2 00 Jun 28 2007 Page 304 of 666 REJ09B0311 0200...
Страница 470: ...Section 12 Watchdog Timer WDT Rev 2 00 Jun 28 2007 Page 448 of 666 REJ09B0311 0200...
Страница 546: ...Section 13 Serial Communication Interface SCI Rev 2 00 Jun 28 2007 Page 524 of 666 REJ09B0311 0200...
Страница 566: ...Section 14 A D Converter Rev 2 00 Jun 28 2007 Page 544 of 666 REJ09B0311 0200...
Страница 574: ...Section 16 RAM Rev 2 00 Jun 28 2007 Page 552 of 666 REJ09B0311 0200...
Страница 584: ...Section 17 Clock Pulse Generator Rev 2 00 Jun 28 2007 Page 562 of 666 REJ09B0311 0200...
Страница 638: ...Section 19 List of Registers Rev 2 00 Jun 28 2007 Page 616 of 666 REJ09B0311 0200...
Страница 668: ...Section 20 Electrical Characteristics Rev 2 00 Jun 28 2007 Page 646 of 666 REJ09B0311 0200...
Страница 676: ...Appendix Rev 2 00 Jun 28 2007 Page 654 of 666 REJ09B0311 0200...
Страница 688: ...Rev 2 00 Jun 28 2007 Page 666 of 666 REJ09B0311 0200...
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Страница 692: ...H8SX 1650 Group Hardware Manual...