参数资料
型号: ST72E331N4D0
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP56
封装: 0.600 INCH, WINDOWED, CERAMIC, SDIP-56
文件页数: 37/107页
文件大小: 691K
代理商: ST72E331N4D0
35/107
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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