ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 29

• 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
Caution:
4.5
4.5.1
3
4
5
isolate the application reset circuit in this case. When using a classical RC network with
R>1K or a reset management IC with open drain output and pull-up resistor>1K, no
additional components are needed. In all cases the user must ensure that no external reset
is generated by the application during the ICC session.
The use of Pin 7 of the ICC connector depends on the Programming Tool architecture. This
pin must be connected when using most ST Programming Tools (it is used to monitor the
application power supply). Please refer to the Programming Tool manual.
Pin 9 has to be connected to the OSC1 pin of the ST7 when the clock is not available in the
application or if the selected clock option is not programmed in the option byte. ST7 devices
with multi-oscillator capability need to have OSC2 grounded in this case.
In “enabled option byte” mode (38-pulse ICC mode), the internal RC oscillator is forced as a
clock source, regardless of the selection in the option byte.
During normal operation the ICCCLK pin must be internally or externally pulled- up (external
pull-up of 10 kΩ mandatory in noisy environment) to avoid entering ICC mode unexpectedly
during a reset. In the application, even if the pin is configured as output, any reset will put it
back in input pull-up.
Figure 6.
Memory protection
There are two different types of memory protection: Read Out Protection and Write/Erase
Protection which can be applied individually.
Readout protection
Readout protection, when selected provides a protection against program memory content
extraction and against write access to Flash memory. Even if no protection can be
considered as totally unbreakable, the feature provides a very high level of protection for a
general purpose microcontroller. Both program and data E
POWER SUPPLY
APPLICATION
Typical ICC interface
(See Note 3)
C
L2
Doc ID 12321 Rev 5
OPTIONAL
(See Note 4)
C
ST7
L1
HE10 CONNECTOR TYPE
10kΩ
ICC CONNECTOR
10
9
PROGRAMMING TOOL
ICC CONNECTOR
7
8
5
6
4
3
ICC Cable
1
2
2
memory are protected.
See Note 1
APPLICATION BOARD
Flash program memory
APPLICATION
RESET SOURCE
See Note 2
APPLICATION
I/O
29/247