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M39432 Datenblatt(PDF) 14 Page - STMicroelectronics

Teilenummer M39432
Bauteilbeschribung  Single Chip 4 Mbit Flash Memory and 256 Kbit Parallel EEPROM
PDF  28 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M39432 Datenblatt(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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