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M28F420 データシート(PDF) 33 Page - STMicroelectronics

部品番号 M28F420
部品情報  4 Megabit (x8 or x16, Block Erase) FLASH MEMORY
PDF  38 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M28F420 データシート(HTML) 33 Page - STMicroelectronics

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AI01286C
BYTE
IDENTIFIER
YES
NO
90h
READ
STATUS
YES
70h
NO
CLEAR
STATUS
YES
50h
NO
PROGRAM
SET-UP
YES
40h or
10h
NO
ERASE
SET-UP
YES
20h
NO
ERASE
COMMAND
ERROR
YES
0FFh
WAIT FOR
COMMAND
WRITE (1)
READ
STATUS
READ
ARRAY
PROGRAM
READ
STATUS
YES
READY
(2)
NO
YES
OD0h
NO
A
B
NO
Figure 14. Command Interface and Program Erase Controller Flow-diagram (a)
Notes: 1. If no command is written, the Command Interface remains in its previous valid state. Upon power-up, on exit from power-down or
if VCC falls below VLKO, the Command Interface defaults to Read Array mode.
2. P/E.C. status (Ready or Busy) is read on Status Register bit 7.
33/38
M28F410, M28F420



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