ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 30

• 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

Flash program memory
4.5.2
4.6
4.6.1
Note:
30/247
In Flash devices, this protection is removed by reprogramming the option. In this case, both
program and data E
reprogrammed.
Read-out protection selection depends on the device type:
●
●
Flash write/erase protection
Write/erase protection, when set, makes it impossible to both overwrite and erase program
memory. It does not apply to E
applications and prevent any change being made to the memory content.
Write/erase protection is enabled through the FMP_W bit in the option byte.
Register description
Flash control/status register (FCSR)
Reset value: 0000 0000 (00h)
1st RASS Key: 0101 0110 (56h)
2nd RASS Key: 1010 1110 (AEh)
This register is reserved for programming using ICP, IAP or other programming methods. It
controls the XFlash programming and erasing operations. For details on XFlash
programming, refer to the ST7 Flash Programming Reference Manual.
When an EPB or another programming tool is used (in socket or ICP mode), the RASS keys
are sent automatically.
In Flash devices it is enabled and removed through the FMP_R bit in the option byte.
In ROM devices it is enabled by mask option specified in the Option List.
7
0
Warning:
0
Once set, Write/erase protection can never be removed. A
write-protected Flash device is no longer reprogrammable.
2
memory are automatically erased, and the device can be
0
2
Doc ID 12321 Rev 5
data. Its purpose is to provide advanced security to
0
Read/Write
0
OPT
ST72344xx ST72345xx
LAT
PGM
0