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AM29F002T-70JE 数据表(PDF) 9 Page - Advanced Micro Devices

部件名 AM29F002T-70JE
功能描述  2 Megabit (256 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory
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制造商  AMD [Advanced Micro Devices]
网页  http://www.amd.com
标志 AMD - Advanced Micro Devices

AM29F002T-70JE 数据表(HTML) 9 Page - Advanced Micro Devices

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Am29F002/Am29F002N
9
PR ELIMIN A R Y
Table 3.
Am29F002/Am29F002N Bottom Boot Block Sector Address Table
Autoselect Mode
The autoselect mode provides manufacturer and de-
vice 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.
When using programming equipment, the autoselect
mode requires VID (11.5 V to 12.5 V) on address pin
A9. Address pins A6, A1, and A0 must be as shown in
Autoselect Codes (High Voltage Method) table. In addi-
tion, when verifying sector protection, the sector ad-
dress must appear on the appropriate highest order
address bits. Refer to the corresponding Sector Ad-
dress 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 program-
ming 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-
tions table. This method does not require VID. See
“Command Definitions” for details on using the autose-
lect mode.
Table 4.
Am29F002/Am29F002N Autoselect Codes (High Voltage Method)
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
hardware sector unprotection feature re-enables both
program and erase operations in previously pro-
tected sectors.
Sector protection/unprotection must be implemented
using programming equipment. The procedure re-
quires a high voltage (VID) on address pin A9 and the
control pins. Details on this method are provided in the
supplements, publication numbers 20819 and 21183.
Sector
A17
A16
A15
A14
A13
Sector Size
(Kbytes)
Address Range
(in hexadecimal)
SA0
000
0
X
16
00000h–03FFFh
SA1
0
0
0
1
0
8
04000h–05FFFh
SA2
0
0
0
1
1
8
06000h–07FFFh
SA3
0
0
1
X
X
32
08000h–0FFFFh
SA4
0
1
X
X
X
64
10000h–1FFFFh
SA5
1
0
X
X
X
64
20000h–2FFFFh
SA6
1
1
X
X
X
64
30000h–3FFFFh
Description
CE#
OE#
WE#
A17
to
A13
A12
to
A10
A9
A8
to
A7
A6
A5
to
A2
A1
A0
DQ7
to
DQ0
Manufacturer ID: AMD
L
L
H
X
X
VID
X
LXL
L
01h
Device ID:
Am29F002/Am29F002N
(Top Boot Block)
LL
H
XX
VID
X
LXL
H
B0h
LL
H
Device ID:
Am29F002/Am29F002N
(Bottom Boot Block)
LL
H
XX
VID
X
LXL
H
34h
LL
H
Sector Protection Verification
L
L
H
SA
X
VID
XL
X
H
L
01h
(protected)
00h
(unprotected)


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