ST7DALIF2 STMicroelectronics, ST7DALIF2 Datasheet - Page 23
ST7DALIF2
Manufacturer Part Number
ST7DALIF2
Description
8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
Manufacturer
STMicroelectronics
Datasheet
1.ST7DALIF2.pdf
(171 pages)
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
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ST7DALIF2
7
7.1
7.2
7.3
Data EEPROM
Introduction
The Electrically Erasable Programmable Read Only Memory can be used as a non volatile
back-up for storing data. Using the EEPROM requires a basic access protocol described in
this chapter.
Main features
■
■
■
■
■
■
Figure 5.
Memory access
The Data EEPROM memory read/write access modes are controlled by the E2LAT bit of the
EEPROM Control/Status register (EECSR). The flowchart in
different memory access modes.
Read operation (E2LAT=0)
The EEPROM can be read as a normal ROM location when the E2LAT bit of the EECSR
register is cleared.
EECSR
Up to 32 Bytes programmed in the same cycle
EEPROM mono-voltage (charge pump)
Chained erase and programming cycles
Internal control of the global programming cycle duration
Wait mode management
Readout protection
EEPROM block diagram
0
ADDRESS BUS
0
DECODER
ADDRESS
0
0
4
0
DECODER
0
4
4
ROW
E2LAT
E2PGM
128
MULTIPLEXER
DATA
(1 ROW = 32 x 8 BITS)
MEMORY MATRIX
HIGH VOLTAGE
Figure 6
DATA BUS
EEPROM
PUMP
DATA LATCHES
128
32 x 8 BITS
describes these
Data EEPROM
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