ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 3
ST72344S4
Manufacturer Part Number
ST72344S4
Description
8-bit MCU
Manufacturer
STMicroelectronics
Datasheet
1.ST72344S4.pdf
(247 pages)
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
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ST72344xx ST72345xx
7
8
6.1
6.2
6.3
Supply, reset and clock management . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.1
7.2
7.3
7.4
7.5
7.6
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
8.1
8.2
8.3
8.4
8.5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
CPU registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.3.1
6.3.2
Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Phase locked loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Multioscillator (MO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.3.1
7.3.2
7.3.3
Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.4.1
7.4.2
Reset sequence manager (RSM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
7.5.1
7.5.2
7.5.3
7.5.4
7.5.5
System integrity management (SI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.6.1
7.6.2
7.6.3
7.6.4
7.6.5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Masking and processing flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Interrupts and low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Concurrent & nested management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Interrupt register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.5.1
Condition code register (CC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Stack pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
External clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Crystal/ceramic oscillators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Internal RC oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
RC control register (RCCRH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
RC control register (RCCRL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Asynchronous external RESET pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
External power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Internal low-voltage detector (LVD) reset . . . . . . . . . . . . . . . . . . . . . . . . 48
Internal watchdog reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Low-voltage detector (LVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Auxiliary-voltage detector (AVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
CPU CC register interrupt bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Doc ID 12321 Rev 5
Contents
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