ST72331N4 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST72331N4

8-BIT MCU WITH 8 TO 16K OTP/EPROM, 256 EEPROM, 384 TO 512 BYTES RAM, ADC, WDG, SCI, SPI AND 2 TIMERS

STMicroelectronics 

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EEPROM (Cont’d)

Figure 23. EEPROM Programming Cycle

Read operation not possible

INTERNAL

PROGRAMMING

VOLTAGE

Erase cycle

Write cycle

Write of

data

latches

Tprog

ST72E331 ST72T331

Read operation allowed

E2LAT

E2PGM

INTERRUPT

REQUEST

Figure 24. EEPROM Programming Flowchart

Write 1 to 16 bytes

in the same row

(with the same 12

Most Significant

Bits of the address)

E2LAT=0

E2PGM=0

(Read mode)

E2LAT=1

E2PGM=0

(Write mode)

Write bytes in

EEPROM

Interrupt

vector fetch

E2LAT=1

E2PGM=1

(Start

programming

cycle)

Wait for end of

programming

(E2LAT=0

or interrupt)

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