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M39432 数据表(PDF) 14 Page - STMicroelectronics

部件名 M39432
功能描述  Single Chip 4 Mbit Flash Memory and 256 Kbit Parallel EEPROM
PDF  28 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

M39432 数据表(HTML) 14 Page - STMicroelectronics

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Figure 9. Sector Unprotecting Flowchart
Note: 1. The Verify Sector Status operation is specified in Table 10.
2. A6 is kept at VIH during unprotection algorithm in order to secure best unprotection verification. During all other protection status
reads, A6 must be kept at VIL.
AI01949C
A18, A17, A16 = VIH
A12, A9, A6, G = VIH
DQ0-7
EF, G, A9 = VID
Wait 4µs
W = VIH
EF, G = VIH
Verify Sector
Protection Status1,2
Wait 10ms
Wait 4µs
=
00h
Previous Sector
(Decrement A18, A17, A16)
n = 0
Wait 4µs
W = VIL
++n
= 1000
START
FAIL
YES
YES
NO
PASS
NO
Last
Sector
YES
NO
EE = EF = VIH



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