October 2000
AS29LV800
®
Item
Description
Verifies write protection for sector. Sectors are protected from program/erase operations on commercial
programming equipment. Determine if sector protection exists in a system by writing the ID read
command sequence and reading location XXX02h, where address bits A12–18 select the defined sector
addresses. A logical 1 on DQ0 indicates a protected sector; a logical 0 indicates an unprotected sector.
Verify sector
protect/
unprotect
Temporarily disables sector protection for in-system data changes to protected sectors. Apply +10V to
RESET 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.
Temporary
sector
unprotect
Resets the interal state machine to read mode. If device is programming or erasing when RESET = L, data
may be corrupted.
RESET
Deep
power down
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.
Automatic
sleep mode
Flexible sector architecture
Bottom boot sector architecture (AS29LV800B)
Top boot sector architecture (AS29LV800T)
Size
Size
Sector
0
×8
×16
(Kbytes)
×8
×16
(Kbytes)
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
32
8
00000h–03FFFh 00000h–01FFFh
04000h–05FFFh 02000h–02FFFh
06000h–07FFFh 03000h–03FFFh
08000h–0FFFFh 04000h–07FFFh
10000h–1FFFFh 08000h–0FFFFh
20000h–2FFFFh 10000h–17FFFh
30000h–3FFFFh 18000h–1FFFFh
40000h–4FFFFh 20000h–27FFFh
50000h–5FFFFh 28000h–2FFFFh
60000h–6FFFFh 30000h–37FFFh
70000h–7FFFFh 38000h–3FFFFh
80000h–8FFFFh 40000h–47FFFh
90000h–9FFFFh 48000h–4FFFFh
A0000h–AFFFFh 50000h–57FFFh
B0000h–BFFFFh 58000h–5FFFFh
C0000h–CFFFFh 60000h–67FFFh
D0000h–DFFFFh 68000h–6FFFFh
E0000h–EFFFFh 70000h–77FFFh
F0000h–FFFFFh 78000h–7FFFFh
16
8
00000h–0FFFFh
10000h–1FFFFh
20000h–2FFFFh
30000h–3FFFFh
40000h–4FFFFh
50000h–5FFFFh
60000h–6FFFFh
70000h–7FFFFh
80000h–8FFFFh
90000h–9FFFFh
00000h–07FFFh
08000h–0FFFFh
10000h–17FFFh
18000h–1FFFFh
20000h–27FFFh
28000h–2FFFFh
30000h–37FFFh
38000h–3FFFFh
40000h–47FFFh
48000h–4FFFFh
1
2
8
3
32
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
A0000h–AFFFFh 50000h–57FFFh
B0000h–BFFFFh 58000h–5FFFFh
C0000h–CFFFFh 60000h–67FFFh
D0000h–DFFFFh 68000h–6FFFFh
E0000h–EFFFFh
F0000h–F7FFFh
70000h–77FFFh
78000h–7BFFFh
F8000h–F9FFFh 7C000h–7CFFFh
FA000h–FBFFFh 7D000h–7DFFFh
FC000h–FFFFFh 7E000h–7FFFFh
8
16
In word mode, there are one 8K word, two 4K word, one 16K word, and fifteen 32K word sectors. Address range is A18–A-1 ifBYTE = VIL; address range
is A18–A0 if BYTE = VIH
.
4
ALLIANCE SEMICONDUCTOR
DID 11-40002-A. 10/19/00
ANADIGICS [ ANADIGICS, INC ]
