ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 84

• Manufacturer Part Number: ST72344S4
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST72344S4

• Up To 16 Kbytes Program Memory: single voltage extended Flash (XFlash) with readout and write protection, in-circuit and inapplication programming (ICP and IAP). 10K write/erase cycles guaranteed, data retention
• 256 Bytes Data Eeprom With Readout Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55 °C.
• Clock Sources: crystal/ceramic resonator oscillators, high-accuracy internal RC oscillator or external clock
• 5 Power-saving Modes: Slow, Wait, Halt, Auto-wakeup from Halt and Active-halt
• 16-bit Timer A With: 1 input capture, 1 output compares, external clock input, PWM and pulse generator modes
• 16-bit Timer B With: 2 input captures, 2 output compares, PWM and pulse generator modes

On-chip peripherals
Note:
11.1.4
11.1.5
Caution:
84/247
The T6 bit can be used to generate a software reset (the WDGA bit is set and the T6 bit is
cleared).
●
Using Halt mode with the WDG
If Halt mode with Watchdog is enabled by option byte (no watchdog reset on HALT
instruction), it is recommended before executing the HALT instruction to refresh the WDG
counter, to avoid an unexpected WDG reset immediately after waking up the microcontroller.
How to program the watchdog timeout
Figure 38
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 38. Approximate timeout duration
Watchdog reset on Halt option
If the watchdog is activated and the watchdog reset on halt option is selected, then the
HALT instruction will generate a Reset.
3F
38
30
28
20
18
10
08
00
1.5
shows the linear relationship between the 6-bit value to be loaded in the watchdog
18
34
Watchdog timeout (ms) @ 8 MHz f
Figure
Doc ID 12321 Rev 5
39.
50
65
82
OSC2
98
ST72344xx ST72345xx
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