st72324bk STMicroelectronics, st72324bk Datasheet - Page 57

• Manufacturer Part Number: st72324bk
• Description: 3 V/5 V Range 8-bit Mcu With 4/8 Kbyte Rom, 10-bit Adc, Four Timers And Spi
• Manufacturer: STMicroelectronics

ST72323 ST72323L
9.1.4
Figure 27. Watchdog block diagram
How to program the watchdog timeout
Figure 28
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
Caution: When writing to the WDGCR register, always write 1 in the T6 bit to avoid
generating an immediate reset.
Figure 28. Approximate timeout duration
MCC/RTC
3F
38
30
28
20
18
10
08
00
11
1.5
MSB
shows the linear relationship between the 6-bit value to be loaded in the
RTC counter
12-bit MCC
f
DIV 64
OSC2
6
18
5
LSB
0
34
Watchdog timeout (ms) @ 8 MHz. f
TB[1:0] bits
(MCCSR
Register)
50
Exact timeout duration (tmin and tmax) on page
WDGA
Reset
65
T6
Watchdog control register (WDGCR)
T5
6-bit downcounter (CNT)
82
OSC2
WDG prescaler
T4
DIV 4
T3
98
On-chip peripherals
T2
114
T1
57/167
T0
58.
128