D A T A S H E E T
Table 3. Am29F002B/Am29F002NB Bottom Boot Block Sector Address Table
Sector Size
(Kbytes)
Address Range
Sector
SA0
SA1
SA2
SA3
SA4
SA5
SA6
A17
0
A16
0
A15
0
A14
0
A13
X
(in hexadecimal)
00000h–03FFFh
04000h–05FFFh
06000h–07FFFh
08000h–0FFFFh
10000h–1FFFFh
20000h–2FFFFh
30000h–3FFFFh
16
8
0
0
0
1
0
0
0
0
1
1
8
0
0
1
X
X
32
64
64
64
0
1
X
X
X
1
0
X
X
X
1
1
X
X
X
Autoselect Mode
The autoselect mode provides manufacturer and
device identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. This
mode is primarily intended for programming equipment
to automatically match a device to be programmed with
its corresponding programming algorithm. However,
the autoselect codes can also be accessed in-system
through the command register.
the appropriate highest order address bits. Refer to the
corresponding Sector Address Tables. The Command
Definitions table shows the remaining address bits that
are don’t care. When all necessary bits have been set
as required, the programming equipment may then
read the corresponding identifier code on DQ7–DQ0.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in the Command Defini-
When using programming equipment, the autoselect
mode requires V on address pin A9. Address pins A6,
tions table. This method does not require V . See
ID
ID
A1, and A0 must be as shown in Autoselect Codes
(High Voltage Method) table. In addition, when verifying
sector protection, the sector address must appear on
“Command Definitions” for details on using the autose-
lect mode.
Table 4. Am29F002B/Am29F002NB Autoselect Codes (High Voltage Method)
A17 A12
to to
CE# OE# WE# A13 A10 A9
A8
to
A7
A5
to
A2
DQ7
to
DQ0
Description
A6
A1
A0
Manufacturer ID: AMD
L
L
L
L
H
H
X
X
VID
X
X
L
X
X
L
L
01h
B0h
Device ID:
Am29F002B/Am29F002NB
(Top Boot Block)
X
X
VID
L
L
L
L
H
H
L
L
L
L
L
L
H
H
H
Device ID:
Am29F002B/Am29F002NB
(Bottom Boot Block)
X
X
X
VID
X
X
X
X
34h
01h
(protected)
Sector Protection Verification
L
L
H
SA
VID
L
H
L
00h
(unprotected)
L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care.
Sector Protection/Unprotection
The hardware sector protection feature disables both
program and erase operations in any sector. The hard-
ware sector unprotection feature re-enables both
program and erase operations in previously protected
sectors.
10
Am29F002B/Am29F002NB
21527D5 November 1, 2006
AMD [ AMD ]
