ST7232AK2T5 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST7232AK2T5

8-BIT MICROCONTROLLER WITH 8K FLASH/ROM, ADC, 4 TIMERS, SPI, SCI INTERFACE

STMicroelectronics 

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ST7232A

WATCHDOG TIMER (Cont’d)

10.1.4 How to Program the Watchdog Timeout

Figure 30 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

Figure 30. Approximate Timeout Duration

more precision is needed, use the formulae in Fig-

ure 31.

Caution: When writing to the WDGCR register, al-

ways write 1 in the T6 bit to avoid generating an

immediate reset.

3F

38

30

28

20

18

10

08

00

1.5

18

34

50

65

82

98

Watchdog timeout (ms) @ 8 MHz. fOSC2

114 128

49/157

1

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