
ML62Q1000 Series User's Manual
Chapter 10 Watchdog Timer
FEUL62Q1000
10-18
The following table shows WDT counter clear enabled periods.
If the overflow period of the WDT counter is set to 62.5 ms or less in WDT2 to 0 bits, the window function is disabled
regardless of setting values of WOVF1 and WOVF0 bits.
Table 10-4 WDT Clear Enabled Period in Window Function Enabled Mode 1
WDT2
WDT1
WDT0
Overflow
period (T
WOV
)
*1
WDT reset
generation time
*1
WDT clear enabled period (T
WCL
)
*1*2
0
0
0
Approx. 7.8 ms
Approx. 7.8 ms
≈ Overflow period
0
0
1
Approx. 15.6 ms
Approx. 15.6 ms
≈ Overflow period
0
1
0
Approx. 31.3 ms
Approx. 31.3 ms
≈ Overflow period
0
1
1
Approx. 62.5 ms
Approx. 62.5 ms
≈ Overflow period
1
0
0
Approx. 125 ms
Approx. 125 ms
≈ 75% of overflow period
1
0
1
Approx. 500 ms
Approx. 500 ms
≈ 75% of overflow period
1
1
0
Approx. 2000 ms
Approx. 2000 ms
≈ 75% of overflow period
1
1
1
Approx. 8000 ms
Approx. 8000 ms
≈ 75% of overflow period
*1: Time when the WDTCLK is 1 .024kHz. For the WDTCLK, select LSCLK through the code option.
*2: The clear processing is enable for two clocks of the WDTCLK (2ms when the WDTCLK is 1.024kHz) before the
WDT gets overflowed.
Table 10-5 WDT Counter Clear Enabled Period in Window Function Enabled Mode 2
WDT2
WDT1
WDT0
Overflow
period (T
WOV
)
*1
WDT reset
generation time
*1
WDT clear enabled period
(T
WCL
)
*1*2
0
0
0
Approx. 7.8 ms
Approx. 7.8 ms
≈ Overflow period
0
0
1
Approx. 15.6 ms
Approx. 15.6 ms
≈ Overflow period
0
1
0
Approx. 31.3 ms
Approx. 31.3 ms
≈ Overflow period
0
1
1
Approx. 62.5 ms
Approx. 62.5 ms
≈ Overflow period
1
0
0
Approx. 125 ms
Approx. 125 ms
≈ 50% of overflow period
1
0
1
Approx. 500 ms
Approx. 500 ms
≈ 50% of overflow period
1
1
0
Approx. 2000 ms
Approx. 2000 ms
≈ 50% of overflow period
1
1
1
Approx. 8000 ms
Approx. 8000 ms
≈ 50% of overflow period
*1: Time when the WDTCLK is 1 .024kHz. For the WDTCLK, select LSCLK through the code option.
*2: The clear processing is enable for two clocks of the WDTCLK (2ms when the WDTCLK is 1.024kHz)
before the WDT gets overflowed.
[Note]
Ÿ
When using the window function enabled mode, always define a WDT interrupt function even though no
WDT interrupt occurs. For providing the fail-safe, it is recommended to generate the WDT invalid clear
reset by forcibly clearing the WDT in the WDT interrupt function.
Ÿ
When using the window function enabled mode, choose "the clock with divided frequency of low-speed
oscillation clock (32.768 kHz)" for the WDT count clock with the code option. If "WDT RC1K oscillation
clock" is chosen, this function is unusable because the frequency has a significant error.
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...