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ST72E331 Datasheet(PDF) 35 Page - STMicroelectronics

Part # ST72E331
Description  8-BIT MCU WITH 8 TO 16K OTP/EPROM, 256 EEPROM, 384 TO 512 BYTES RAM, ADC, WDG, SCI, SPI AND 2 TIMERS
PDF  107 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72E331 Datasheet(HTML) 35 Page - STMicroelectronics

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ST72E331 ST72T331
EEPROM (Cont’d)
Figure 23. EEPROM Programming Cycle
Figure 24. EEPROM Programming Flowchart
Erase cycle
Write cycle
Tprog
Read operation allowed
Read operation not possible
INTERNAL
PROGRAMMING
VOLTAGE
Write of
data
latches
E2LAT
E2PGM
INTERRUPT
REQUEST
Interrupt
vector fetch
E2LAT=1
E2PGM=0
(Write mode)
Write bytes in
EEPROM
E2LAT=1
E2PGM=1
(Start
programming
cycle)
Wait for end of
programming
(E2LAT=0
or interrupt)
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)
35



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