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參數(shù)資料
| 型號： | Am29F400AT-120EIB |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | 4 Megabit (524,288 x 8-Bit/262,144 x 16-Bit) CMOS 5.0 Volt-only, Sector Erase Flash Memory |
| 中文描述： | 4兆位（524,288 x 8-Bit/262，144 x 16位），5.0伏的CMOS只，扇區(qū)擦除閃存 |
| 文件頁數(shù)： | 9/35頁 |
| 文件大小： | 136K |
| 代理商： | AM29F400AT-120EIB |
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Am29F400AT/Am29F400AB
9
P R E L I M I N A R Y
5
Output Disable
With the OE input at a logic high level (V
IH
), output from
the device is disabled. This will cause the output pins to
be in a high impedance state.
Autoselect
The autoselect mode allows the reading of a binary
code from the device and will identify its manufacturer
and type. This mode is intended for use by program-
ming equipment for the purpose of automatically
matching the device to be programmed with its corre-
sponding programming algorithm. This mode is func-
tional over the entire temperature range of the device.
To activate this mode, the programming equipment
must force V
ID
(11.5 V to 12.5 V) on address pin A9.
Two identifier bytes may then be sequenced from the
device outputs by toggling address A0 from V
IL
to V
IH
.
All addresses are don’t cares except A0, A1, and A6
(see Table 3).
The manufacturer and device codes may also be read
via the command register, for instances when the
Am29F400A is erased or programmed in a system
without access to high voltage on the A9 pin. The com-
mand sequence is illustrated in Table 4 (see Autoselect
Command Sequence).
Byte 0 (A0 = V
IL
) represents the manufacturer’s code
(AMD=01H) and byte 1 (A0 = V
IH
) the device identifier
code (Am29F400AT = 23H and Am29F400AB = ABH
for x8 mode; Am29F400AT = 2223H and Am29F400AB
= 22ABH for x16 mode). These two bytes/words are
given in the table below. All identifiers for manufacturer
and device will exhibit odd parity with DQ7 defined as
the parity bit. In order to read the proper device codes
when executing the Autoselect, A1 must be V
IL
(see Tables 3 and 4).
The autoselect mode also facilitates the determination
of sector protection in the system. By performing a read
operation at the address location XX02H with the
higher order address bits A12–A17 set to the desired
sector address, the device will return 01H for a pro-
tected sector and 00H for a non-protected sector.
Table 3.
Am29F400A Sector Protection Verify Autoselect Codes
*Outputs 01H at protected sector addresses
Table 4.
Expanded Autoselect Code Table
B) - Byte mode
(W) - Word mode
Type
A12-A17
A6
A1
A0
Code (HEX)
Manufacturer Code-AMD
X
V
IL
V
IL
V
IL
01H
Am29F400A Device
Am29F400AT
Byte
X
V
IL
V
IL
V
IH
23H
Word
2223H
Am29F400AB
Byte
X
V
IL
V
IL
V
IH
ABH
Word
22ABH
Sector Protection
Sector
Address
V
IL
V
IH
V
IL
01H*
Type
Code
DQ
15
DQ
14
DQ
13
DQ
12
DQ
11
DQ
10
DQ
9
DQ
8
DQ
7
DQ
6
DQ
5
DQ
4
DQ
3
DQ
2
DQ
1
DQ
0
Manufacturer Code-AMD
01H
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Am29F400A
Device
Am29F400AT(B)
(W)
23H
2223H
A-1
0
HI-Z
0
HI-Z
1
HI-Z
0
HI-Z
0
HI-Z
0
HI-Z
1
HI-Z
0
0
0
0
0
1
1
0
0
0
0
0
0
1
1
1
1
Am29F400AB(B)
(W)
ABH
22ABH
A-1
0
HI-Z
0
HI-Z
1
HI-Z
0
HI-Z
0
HI-Z
0
HI-Z
1
HI-Z
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
1
Sector Protection
01H
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
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PDF描述 |
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| Am29F400AT-65EIB | 4 Megabit (524,288 x 8-Bit/262,144 x 16-Bit) CMOS 5.0 Volt-only, Sector Erase Flash Memory |
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| Am29F400AT-65FCB | 4 Megabit (524,288 x 8-Bit/262,144 x 16-Bit) CMOS 5.0 Volt-only, Sector Erase Flash Memory |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AM29F400AT-120SC | 制造商:Advanced Micro Devices 功能描述:Flash Mem Parallel 5V 4M-Bit 512K x 8/256K x 16 120ns 44-Pin SO |
| AM29F400AT-90SC | 制造商:Advanced Micro Devices 功能描述:NOR Flash, 256K x 16, 44 Pin, Plastic, SOP |
| AM29F400BB | 制造商: 功能描述: 制造商:undefined 功能描述: |
| AM29F400BB120EC | 制造商:AMD 功能描述:New |
| AM29F400BB-120SC | 制造商:Advanced Micro Devices 功能描述: |
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