ST72T331 STMICROELECTRONICS [STMicroelectronics], ST72T331 Datasheet - Page 33

• Manufacturer Part Number: ST72T331
• Description: 8-BIT MCU WITH 8 TO 16K OTP/EPROM, 256 EEPROM, 384 TO 512 BYTES RAM, ADC, WDG, SCI, SPI AND 2 TIMERS
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

5.2 EEPROM (EEP)
5.2.1 Introduction
The Electrically Erasable Programmable Read
Only Memory is used to store data that need a non
volatile back-up. The use of the EEPROM requires
a basic protocol described in this chapter.
Figure 22. EEPROM Block Diagram
REQUEST
INTERRUPT
EEPCR
ADDRESS
BUS
RESERVED
DETECTOR
FALLING
EDGE
DECODER
ADDRESS
E2ITE E2LAT E2PGM
4
12
MULTIPLEXER
DECODER
DATA
ROW
5.2.2 Main Features
128
8
Up to 16 bytes programmed in the same cycle
EEPROM mono-voltage (charge pump)
Chained erase and programming cycles
Internal control of the global programming cycle
duration
End of programming cycle interrupt flag
WAIT mode management
4
.
.
.
.
.
.
BUFFER
HIGH VOLTAGE PUMP
1 ROW = 16 * 8 BITS
DATA LATCHES
MEMORY
EEPROM
MATRIX
16*8 BITS
ST72E331 ST72T331
8
128
DATA
BUS
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