ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 71

• 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
Figure 33. AWUF Halt timing diagram
Figure 34. AWUFH mode flowchart
1. WDGHALT is an option bit. See option byte section for more details.
2. Peripheral clocked with an external clock source can still be active.
3. Only an AWUFH interrupt and some specific interrupts can exit the MCU from Halt mode (such as external
4. Before servicing an interrupt, the CC register is pushed on the stack. The I[1:0] bits of the CC register are
AWUFH interrupt
f
f
AWU_RC
CPU
interrupt). Refer to
set to the current software priority level of the interrupt routine and recovered when the CC register is
popped.
Run mode
Table 17: Interrupt mapping on page 59
(AWUCSR.AWUEN=1)
HALT INSTRUCTION
N
WATCHDOG
WDGHALT
(MCCSR.OIE=0)
Doc ID 12321 Rev 5
RESET
1
INTERRUPT
Halt mode
Y
t
(1)
AWU
(3)
ENABLE
256 OR 4096 CPU CLOCK
OR SERVICE INTERRUPT
0
FETCH RESET VECTOR
AWU RC OSC
MAIN OSC
PERIPHERALS
CPU
AWU RC OSC
MAIN OSC
PERIPHERALS
CPU
MAIN OSC
PERIPHERALS
CPU
I[1:0] BITS
I[1:0] BITS
AWU RC OSC
I[1:0] BITS
N
CYCLE
for more details.
RESET
WATCHDOG
Y
256 or 4096 t
DELAY
DISABLE
(2)
XX
XX
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
10
(4)
(4)
CPU
Power-saving modes
Run mode
Clear
by software
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