ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 86

• 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
11.1.6
86/247
Figure 40. Window watchdog timing diagram
Low-power modes
Table 37.
Slow
Wait
Halt
Active-halt
Mode
No effect on Watchdog: The downcounter continues to decrement at normal speed.
No effect on Watchdog: The downcounter continues to decrement.
Descriptions
OIE bit in
MCCSR
register
WDGWR
0
0
1
3Fh
T6 bit
Reset
T[5:0] CNT downcounter
Option Byte
WDGHALT
Refresh not allowed
bit in
0
1
x
Doc ID 12321 Rev 5
No Watchdog reset is generated. The MCU enters Halt
mode. The Watchdog counter is decremented once and
then stops counting and is no longer able to generate a
watchdog reset until the MCU receives an external
interrupt or a reset.
If an interrupt is received (refer to interrupt table mapping
to see interrupts which can occur in halt mode), the
Watchdog restarts counting after 256 or 4096 CPU clocks.
If a reset is generated, the Watchdog is disabled (reset
state) unless Hardware Watchdog is selected by option
byte. For application recommendations see
below.
A reset is generated instead of entering halt mode.
No reset is generated. The MCU enters Active Halt mode.
The Watchdog counter is not decremented. It stop
counting. When the MCU receives an oscillator interrupt or
external interrupt, the Watchdog restarts counting
immediately. When the MCU receives a reset the
Watchdog restarts counting after 256 or 4096 CPU clocks.
Refresh Window
Description
(step = 16384/f
time
ST72344xx ST72345xx
OSC2
)
Section 11.1.8