ST7DALIF2 STMicroelectronics, ST7DALIF2 Datasheet - Page 19

• Manufacturer Part Number: ST7DALIF2
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
• Manufacturer: STMicroelectronics

Specifications of ST7DALIF2

• 8 Kbytes Single Voltage Flash Program Memory With Read-out Protection, In-circuit Programming And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• 256 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• Clock Sources: Internal 1% RC oscillator, crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-Halt, Wait and Slow, Auto Wake Up From Halt

ST7DALIF2
6
6.1
6.2
6.3
6.3.1
Flash program memory
Introduction
The ST7 single voltage extended Flash (XFlash) is a non-volatile memory that can be
electrically erased and programmed either on a byte-by-byte basis or up to 32 bytes in
parallel.
The XFlash devices can be programmed off-board (plugged in a programming tool) or on-
board using In-Circuit Programming or In-Application Programming.
The array matrix organization allows each sector to be erased and reprogrammed without
affecting other sectors.
Main features
●
●
●
●
●
Programming modes
The ST7 can be programmed in three different ways:
●
●
●
In-circuit programming (ICP)
ICP uses a protocol called ICC (In-Circuit Communication) which allows an ST7 plugged on
a printed circuit board (PCB) to communicate with an external programming device
connected via cable. ICP is performed in three steps:
Switch the ST7 to ICC mode (In-Circuit Communications). This is done by driving a specific
signal sequence on the ICCCLK/DATA pins while the RESET pin is pulled low. When the
ST7 enters ICC mode, it fetches a specific RESET vector which points to the ST7 System
Memory containing the ICC protocol routine. This routine enables the ST7 to receive bytes
from the ICC interface.
●
●
ICP (In-Circuit Programming)
IAP (In-Application Programming)
ICT (In-Circuit Testing) for downloading and executing user application test patterns in
RAM
Sector 0 size configurable by option byte
Readout and write protection
Insertion in a programming tool. In this mode, FLASH sectors 0 and 1, option byte row
and data EEPROM (if present) can be programmed or erased.
In-Circuit Programming. In this mode, FLASH sectors 0 and 1, option byte row and data
EEPROM (if present) can be programmed or erased without removing the device from
the application board.
In-Application Programming. In this mode, sector 1 and data EEPROM (if present) can
be programmed or erased without removing the device from the application board and
while the application is running.
Download ICP Driver code in RAM from the ICCDATA pin
Execute ICP Driver code in RAM to program the FLASH memory
Flash program memory
19/171