
ML62Q1000 Series User's Manual
Chapter 10 Watchdog Timer
FEUL62Q1000
10-16
10.3.3 Window Function Enabled Mode
In the window function enabled mode, if the WDT counter is uncleared within the WDT clear enabled period and the
counter overflows first time, the WDT reset is generated.
In addition, if the WDT counter is cleared in the period the counter clear is not enabled, the WDT invalid clear reset is
generated.
The WDTR bit of the RSTAT register is set to "1" when the WDT reset occurs, and the state on the LSI is transferred to
the system reset mode.
The WDTWR bit of the RSTAT register is set to "1" when the WDT invalid clear reset occurs, and the state on the LSI is
transferred to the system reset mode. See Chapter 3 "Reset Function" for details of the RSTAT register.
In the window function enabled mode, two types of modes can be chosen through the WDTMOD register:
Ÿ
Window function enabled mode 1 (the clear enabled period is approximately 75% of the overflow period)
Ÿ
Window function enabled mode 2 (the clear enabled period is approximately 50% of the overflow period)
Figure 10-9 Procedure to Use WDT (in Window Function Enabled Mode)
Set through WOVF1 and WOVF0 bits of WDTMOD
register
Setting start
Set through WDT2 to WDT0 bits of WDTMOD register
Overflow timing
setting
Set the mode
Other processing
Writing "0x5A" with the WDP bit of WDTCON register set to "0",
then writing "0xA5" with the WDP bit set to "1" enables WDT
counter to be cleared
Clearing in progress or pending?
Check through WDTCLR1 and WDTCLR2 bits of WDTSTA
register
Status check
WDT counter
clearing
WDT counter clear
period setting
In order to avoid clearing during the counter clear disabled
period, determine the WDT counter clearing period using
the timer, etc.
N
Y
The set period of
time has passed?
WDT counter
clearing
Counter clearing before initial mode setting
Содержание ML62Q1000 Series
Страница 17: ...Chapter 1 Overview...
Страница 112: ...Chapter 2 CPU and Memory Space...
Страница 154: ...Chapter 3 Reset Function...
Страница 166: ...Chapter 4 Power Management...
Страница 196: ...Chapter 5 Interrupts...
Страница 248: ...Chapter 6 Clock generation Circuit...
Страница 274: ...Chapter 7 Low Speed Time Base Counter...
Страница 291: ...Chapter 8 16 Bit Timer...
Страница 320: ...Chapter 9 Functional Timer FTM...
Страница 382: ...Chapter 10 Watchdog Timer...
Страница 402: ...Chapter 11 Serial Communication Unit...
Страница 456: ...Chapter 12 I2 C Bus Unit...
Страница 491: ...Chapter 13 I2 C Master...
Страница 512: ...Chapter 14 DMA Controller...
Страница 531: ...Chapter 15 Buzzer...
Страница 550: ...Chapter 16 Simplified RTC...
Страница 559: ...Chapter 17 GPIO...
Страница 594: ...Chapter 18 External Interrupt Function...
Страница 612: ...Chapter 19 CRC Generator...
Страница 632: ...Chapter 20 Analog Comparator...
Страница 644: ...Chapter 21 D A Converter...
Страница 655: ...Chapter 22 Voltage Level Supervisor...
Страница 676: ...Chapter 23 Successive Approximation Type A D Converter...
Страница 709: ...Chapter 24 Regulator...
Страница 714: ...Chapter 25 Flash Memory...
Страница 743: ...Chapter 26 Code Option...
Страница 750: ...Chapter 27 LCD Driver...
Страница 788: ...Chapter 28 On Chip Debug Function...
Страница 795: ...Chapter 29 Safety Function...
Страница 813: ...Appendix A...
Страница 881: ...Revision History...