参数资料
型号: S29AL016M90FFI013
厂商: SPANSION LLC
元件分类: PROM
英文描述: 16 MEGABIT (2M X 8 BIT / I M X 16 BIT) 3.0 VOLT ONLY BOOT SECTOR FLASH MEMORY
中文描述: 1M X 16 FLASH 3V PROM, 90 ns, PBGA64
封装: 13 X 11 MM, LEAD FREE, FBGA-64
文件页数: 11/62页
文件大小: 1850K
代理商: S29AL016M90FFI013
October 11, 2006 S29AL016M_00_A7
S29AL016M
17
Data
Sheet
Sector protection and unprotection requires VID on the RESET# pin only, and can
be implemented either in-system or via programming equipment. Figure 2 shows
the algorithms and Figure 23 shows the timing diagram. This method uses stan-
dard microprocessor bus cycle timing. For sector unprotect, all unprotected
sectors must first be protected prior to the first sector unprotect write cycle.
Temporary Sector Unprotect
This feature allows temporary unprotection of previously protected sectors to
change data in-system. The Sector Unprotect mode is activated by setting the
RESET# pin to VID. During this mode, formerly protected sectors can be pro-
grammed or erased by selecting the sector addresses. Once VID is removed from
the RESET# pin, all the previously protected sectors are protected again. Figure
shows the algorithm, and Figure 22 shows the timing diagrams, for this feature.
Notes:
1. All protected sectors unprotected.
2. All previously protected sectors are protected once again.
Figure 1. Temporary Sector Unprotect Operation
START
Perform Erase or
Program Operations
RESET# = VIH
Temporary Sector
Unprotect Completed
(Note 2)
RESET# = VID
(Note 1)
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