Cypress F2MC-8FX Series 애플리케이션 노트 - 페이지 9
{카테고리_이름} Cypress F2MC-8FX Series에 대한 애플리케이션 노트을 온라인으로 검색하거나 PDF를 다운로드하세요. Cypress F2MC-8FX Series 16 페이지. How to make on-board debug
Cypress F2MC-8FX Series에 대해서도 마찬가지입니다: 방법 (14 페이지)
페이지 인쇄
4.3
Hardware Watchdog Timer
The hardware watchdog timer is set up through the following procedure:
Activate the watchdog timer by writing "A597
1.
(WDT is enabled in every mode) except other than "A596
flash memory, which are copied to the watchdog timer selection ID register WDTH/WDTL (0FEB
2.
The HWWDT starts automatically after a reset.
3.
Clear the watchdog timer with minimum interval time. (WDTC:WTE3 to WTE0 = 0101
Cause of while using the HWWDT, the count clock switch bits: CS1, CS0, CSP are fixed at "001", the interval time is
16
fixed at 2
/F
too.
CRL
The following example shows how to set watchdog timer for operating in hardware mode.
/* Hardware watchdog timer starts automatically after a reset and */
/* cannot be stopped. The internal time is fixed to 2
/* main routine */
void
main (void)
{
...
WDTC |= 0x05;
...
}
;------------------------------------------------------------------------
; Hard Watchdog
;------------------------------------------------------------------------
; #define HWD_DISABLE
#ifdef
#endif
main.c
startup.asm
Refer to Appendix Sample Code for project "HWWDT".
Please note that the hardware watchdog timer starts automatically after a reset and cannot stop its operation.
www.cypress.com
// clear WDT counter
HWD_DISABLE
.SECTION
WDT, CONST, LOCATE=H'FFBE
.DATA.W
0xA596
Document No. 002-05336 Rev.*A
F²MC-8FX Family, MB95200H/210H Series Watchdog Timer
" (WDT is enabled except in standby mode) or any other value
H
" and "A597
" to the address FFBE
H
H
16
/FCRL
and FFBF
on the
H
H
/0FEC
)
H
H
)
B
*/
8