ST72521 STMICROELECTRONICS [STMicroelectronics], ST72521 Datasheet - Page 54
ST72521
Manufacturer Part Number
ST72521
Description
8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.ST72521.pdf
(211 pages)
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ST72521
WATCHDOG TIMER (Cont’d)
10.1.4 How to Program the Watchdog Timeout
Figure 33
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 33. Approximate Timeout Duration
54/211
3F
38
30
28
20
18
10
08
00
1.5
shows the linear relationship between
18
34
Watchdog timeout (ms) @ 8 MHz. f
50
more precision is needed, use the formulae in
ure
Caution: When writing to the WDGCR register, al-
ways write 1 in the T6 bit to avoid generating an
immediate reset.
65
34.
82
OSC2
98
114
128
Fig-
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