AS29LV400R-90SI 데이터 시트보기 (PDF) - Alliance Semiconductor
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AS29LV400R-90SI Datasheet PDF : 24 Pages
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January 2001
AS29LV400
®
Item
Temporary
sector
unprotect
RESET
Deep
power down
Automatic
sleep mode
Description
Temporarily disables sector protection for in-system data changes to protected sectors. Apply +10V toRESET
to activate temporary sector unprotect mode. During temporary sector unprotect mode, program protected
sectors by selecting the appropriate sector address. All protected sectors revert to protected state on removal
of +10V from RESET.
Resets the interal state machine to read mode. If device is programming or erasing when RESET = L, data
may be corrupted.
Hold RESET low to enter deep power down mode (<1 µA). Recovery time to start of first read cycle is 50ns.
Enabled automatically when addresses remain stable for 300ns.Typical current draw is 1 µA. Existing data is
available to the system during this mode. If an address is changed, automatic sleep mode is disabled and new
data is returned within standard access times.
Flexible sector architecture
Bottom boot sector architecture (AS29LV400B)
Top boot sector architecture (AS29LV400T)
Sector
×8
Size
×16
(Kbytes)
×8
Size
×16
(Kbytes)
0
00000h–03FFFh 00000h–01FFFh
16
00000h–0FFFFh 00000h–07FFFh
64
1
04000h–05FFFh 02000h–02FFFh
8
10000h–1FFFFh 08000h–0FFFFh
64
2
06000h–07FFFh 03000h–03FFFh
8
20000h–2FFFFh 10000h–17FFFh
64
3
08000h–0FFFFh 04000h–07FFFh
32
30000h–3FFFFh 18000h–1FFFFh
64
4
10000h–1FFFFh 08000h–0FFFFh
64
40000h–4FFFFh 20000h–27FFFh
64
5
20000h–2FFFFh 10000h–17FFFh
64
50000h–5FFFFh 28000h–2FFFFh
64
6
30000h–3FFFFh 18000h–1FFFFh
64
60000h–6FFFFh 30000h–37FFFh
64
7
40000h–4FFFFh 20000h–27FFFh
64
70000h–77FFFh 38000h–3BFFFh
32
8
50000h–5FFFFh 28000h–2FFFFh
64
78000h–79FFFh 3C000h–3CFFFh
8
9
60000h–6FFFFh 30000h–37FFFh
64
7A000h–7BFFFh 3D000h–3DFFFh
8
10
70000h–7FFFFh 38000h–3FFFFh
64
7C000h–7FFFFh 3E000h–3FFFFh
16
In word mode, there are one 8K word, two 4K word, one 16K word, and seven 32K word sectors. Address range is A17–A-1 if BYTE = VIL; address range is
A17–A0 if BYTE = VIH.
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