ST72264G2 datasheet(49/172 Pages) STMICROELECTRONICS

Part #	ST72264G2

Description	8-BIT MCU WITH FLASH OR ROM MEMORY, ADC, TWO 16-BIT TIMERS, I2C, SPI, SCI INTERFACES

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ST72260Gx, ST72262Gx, ST72264Gx

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WATCHDOG TIMER (Cont’d)

11.1.4 How to Program the Watchdog Timeout

Figure 32 shows the linear relationship between

the 6-bit value to be loaded in the Watchdog Coun-

ter (CNT) and the resulting timeout duration in mil-

liseconds. This can be used for a quick calculation

without taking the timing variations into account. If

more precision is needed, use the formulae in Fig-

ure 33.

Caution: When writing to the WDGCR register, al-

ways write 1 in the T6 bit to avoid generating an

immediate reset.

Figure 32. Approximate Timeout Duration

Watchdog timeout (ms) @ 8 MHz. fOSC2

3F

00

38

128

1.5

65

30

28

20

18

10

08

50

34

18

82

98

114

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