ST7LITE49M STMicroelectronics, ST7LITE49M Datasheet - Page 26

• Manufacturer Part Number: ST7LITE49M
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST7LITE49M

• 4 Kbytes Single Voltage Extended Flash (xflash) Program Memory With Read-out Protection In-circuit Programming And In-application Programming (icp And Iap) Endurance: 10k write/erase cycles guaranteed Data retention
• 128 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55 °C.
• Clock Sources: Internal trimmable 8 MHz RC oscillator, auto-wakeup internal low power - low frequency oscillator, crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-halt, Auto-wakeup from Halt, Wait and Slow
• A/d Converter: 10 input channels

Data EEPROM
5.4
5.4.1
5.4.2
5.4.3
5.5
26/188
Figure 8.
1. If a programming cycle is interrupted (by a reset action), the integrity of the data in memory is not
Power saving modes
Wait mode
The data EEPROM can enter Wait mode on execution of the WFI instruction of the
microcontroller or when the microcontroller enters Active-halt mode.The data EEPROM will
immediately enter this mode if there is no programming in progress, otherwise the data
EEPROM will finish the cycle and then enter Wait mode.
Active-halt mode
Refer to Wait mode.
Halt mode
The data EEPROM immediately enters Halt mode if the microcontroller executes the Halt
instruction. Therefore the EEPROM will stop the function in progress, and data may be
corrupted.
Access error handling
If a read access occurs while E2LAT=1, then the data bus will not be driven.
If a write access occurs while E2LAT=0, then the data on the bus will not be latched.
If a programming cycle is interrupted (by a RESET action), the integrity of the data in
memory will not be guaranteed.
E2LAT bit
E2PGM bit
guaranteed.
DEFINITION
ROW
Data EEPROM write operation
Byte 1
Set by USER application
⇓ Row / byte ⇒
Writing data latches
Byte 2
PHASE 1
...
N
0
1
Read operation impossible
Doc ID 13562 Rev 3
Byte 32
0 1 2 3
Waiting E2PGM and E2LAT to fall
Programming cycle
PHASE 2
...
30
31
Read operation possible
Cleared by hardware
Nx20h...Nx20h+1Fh
Physical Address
00h...1Fh
20h...3Fh
ST7LITE49M