ST72F324BJ STMICROELECTRONICS [STMicroelectronics], ST72F324BJ Datasheet - Page 61

• Manufacturer Part Number: ST72F324BJ
• Description: 8-bit MCU, 3.8 to 5.5 V operating range with 8 to 32 Kbyte Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST72324B
10.1.4
Caution:
Figure 32. Watchdog block diagram
How to program the Watchdog timeout
Figure 33
Watchdog Counter (CNT) and the resulting timeout duration in milliseconds. This can be
used for a quick calculation without taking the timing variations into account. If more
precision is needed, use the formulae in
When writing to the WDGCR register, always write 1 in the T6 bit to avoid generating an
immediate reset.
Figure 33. Approximate timeout duration
3F
MCC/RTC
38
30
28
20
18
10
08
00
shows the linear relationship between the 6-bit value to be loaded in the
1.5
11
MSB
RTC counter
12-bit MCC
f
Div 64
OSC2
18
6
5
LSB
0
34
Watchdog timeout (ms) @ 8 MHz. f
TB[1:0] bits
(MCCSR
register)
50
Figure
WDGA
Reset
34.
65
T6
T5
Watchdog Control register (WDGCR)
OSC2
82
6-bit downcounter (CNT)
T4
WDG prescaler
div 4
T3
98
T2
On-chip peripherals
T1
114
T0
128
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