ST72334J/N, ST72314J/N, ST72124J
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6 DATA EEPROM
6.1 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.
6.2 MAIN FEATURES
■ 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
Figure 7. EEPROM Block Diagram
EECSR
EEPROM INTERRUPT
FALLING
EDGE
HIGH VOLTAGE
PUMP
IE LAT00 0 0 0 PGM
EEPROMRESERVED
DETECTOR
EEPROM
MEMORY MATRIX
(1 ROW = 16 x 8 BITS)
ADDRESS
DECODER
DATA
MULTIPLEXER
16 x 8 BITS
DATA LATCHES
ROW
DECODER
DATA BUS
4
4
4
128128
ADDRESS BUS
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