ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 67

• 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

ST72344xx ST72345xx
Note:
1
2
3
4
system is enabled, can generate a Watchdog reset (see
details).
Figure 28. Halt timing overview
Figure 29. Halt mode flowchart
WDGHALT is an option bit. See option byte section for more details.
Peripheral clocked with an external clock source can still be active.
Only some specific interrupts can exit the MCU from Halt mode (such as external interrupt).
Refer to
Before servicing an interrupt, the CC register is pushed on the stack. The I[1:0] bits of the
CC register are set to the current software priority level of the interrupt routine and
recovered when the CC register is popped.
Table 17: Interrupt mapping on page 59
[MCCSR.OIE=0]
Run
(AWUCSR.AWUEN=0)
HALT INSTRUCTION
instruction
N
WATCHDOG
WDGHALT
(MCCSR.OIE=0)
Halt
Doc ID 12321 Rev 5
RESET
1
INTERRUPT
Halt
Y
1)
256 OR 4096 CPU
ENABLE
3)
256 OR 4096 CPU CLOCK
cycle delay
OR SERVICE INTERRUPT
0
FETCH RESET VECTOR
interrupt
Reset
OSCILLATOR
PERIPHERALS
CPU
I[1:0] BITS
OSCILLATOR
PERIPHERALS
CPU
I[1:0] BITS
OSCILLATOR
PERIPHERALS
CPU
I[1:0] BITS
N
or
CYCLE
for more details.
RESET
Y
WATCHDOG
DELAY
vector
Fetch
DISABLE
2)
Section 11.1 on page 82
XX
XX
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
10
Run
4)
4)
Power-saving modes
for more
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