$6 /9
Item
Verify sector
protect/
unprotect
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.
Temporarily disables sector protection for in-system data changes to protected sectors. Apply +10V to RESET
Temporary
to activate temporary sector unprotect mode. During temporary sector unprotect mode, program protected
sector unprotect sectors by selecting the appropriate sector address. All protected sectors revert to protected state on removal
of +10V from RESET.
RESET
Deep
power down
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 with no current
Automatic sleep drawn by the external devices from teh output pin. Existing data is available to the system during this mode.
mode
If an address is changed, automatic sleep mode is disabled and new data is returned within standard access
times.
)OH[LEOH 6HFWRU $UFKLWHFWXUH
Bottom boot sector architecture (AS29LV160B)
Sector
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
×8
000000-003FFF
004000-005FFF
006000-007FFF
008000-00FFFF
010000-01FFFF
020000-02FFFF
030000-03FFFF
040000-04FFFF
050000-05FFFF
060000-06FFFF
070000-07FFFF
080000-08FFFF
090000-09FFFF
0A0000-0AFFFF
0B0000-0BFFFF
0C0000-0CFFFF
0D0000-0DFFFF
0E0000-0EFFFF
0F0000-0FFFFF
×16
00000-01FFF
02000-02FFF
03000-03FFF
04000-07FFF
08000-0FFFF
10000-17FFF
18000-1FFFF
20000-27FFF
28000-2FFFF
30000-37FFF
38000-3FFFF
40000-47FFF
48000-4FFFF
50000-57FFF
58000-5FFFF
60000-67FFF
68000-6FFFF
70000-77FFF
78000-7FFFF
Size
(Kbytes)
16
8
8
32
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
Top boot sector architecture (AS29LV160T)
×8
000000-00FFFF
010000-01FFFF
020000-02FFFF
030000-03FFFF
040000-04FFFF
050000-05FFFF
060000-06FFFF
070000-07FFFF
080000-08FFFF
090000-09FFFF
0A0000-0AFFFF
0B0000-0BFFFF
0C0000-0CFFFF
0D0000-0DFFFF
0E0000-0EFFFF
0F0000-0FFFFF
100000-10FFFF
110000-11FFFF
120000-12FFFF
×16
00000-07FFF
08000-0FFFF
10000-17FFF
18000-1FFFF
20000-27FFF
28000-2FFFF
30000-37FFF
38000-3FFFF
40000-47FFF
48000-4FFFF
50000-57FFF
58000-5FFFF
60000-67FFF
68000-6FFFF
70000-77FFF
78000-7FFFF
80000-87FFF
88000-8FFFF
90000-97FFF
Size
(Kbytes)
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
8/30/01; V.0.9.5
$OOLDQFH 6HPLFRQGXFWRU
P. 4 of 29
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
