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參數(shù)資料
| 型號(hào)： | AM29F040B |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 4 Megabit (512K x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory(4M位均勻扇區(qū)閃速存儲(chǔ)器) |
| 中文描述： | 4兆位（為512k × 8位）的CMOS 5.0伏只，統(tǒng)一部門快閃記憶體（4分位均勻扇區(qū)閃速存儲(chǔ)器） |
| 文件頁數(shù)： | 7/30頁 |
| 文件大小： | 416K |
| 代理商： | AM29F040B |
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Am29F040B
7
outputs are placed in the high impedance state, inde-
pendent of the OE# input.
The device enters the CMOS standby mode when the
CE# pin is held at V
CC
±
0.5 V. (Note that this is a more
restricted voltage range than V
IH
.) The device enters
the TTL standby mode when CE# is held at V
IH
. The
device requires the standard access time (t
CE
) before
it is ready to read data.
If the device is deselected during erasure or program-
ming, the device draws active current until the
operation is completed.
I
CC3
in the DC Characteristics tables represents the
standby current specification.
Output Disable Mode
When the OE# input is at V
IH
, output from the device is
disabled. The output pins are placed in the high imped-
ance state.
Table 2.
Sector Addresses Table
Note:
All sectors are 64 Kbytes in size.
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 V
ID
(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 ad-
dition, when verifying sector protection, the sector
address 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 V
ID
. See
“Command Definitions” for details on using the autose-
lect mode.
Table 3.
Am29F040B Autoselect Codes (High Voltage Method)
Sector
A18
A17
A16
Address Range
SA0
0
0
0
00000h–0FFFFh
SA1
0
0
1
10000h–1FFFFh
SA2
0
1
0
20000h–2FFFFh
SA3
0
1
1
30000h–3FFFFh
SA4
1
0
0
40000h–4FFFFh
SA5
1
0
1
50000h–5FFFFh
SA6
1
1
0
60000h–6FFFFh
SA7
1
1
1
70000h–7FFFFh
Description
A18–A16
A15–A10
A9
A8–A7
A6
A5–A2
A1
A0
Identifier Code on
DQ7-DQ0
Manufacturer ID
:
AMD
X
X
V
ID
X
V
IL
X
V
IL
V
IL
01h
Device ID: Am29F040B
X
X
V
ID
X
V
IL
X
V
IL
V
IH
A4h
Sector Protection
Verification
Sector
Address
X
V
ID
X
V
IL
X
V
IH
V
IL
01h (protected)
00h (unprotected)
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| AM29F040B120EC | 制造商:AMD 功能描述:* |
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| AM29F040B120JC | 制造商:AMD 功能描述:* 制造商:Advanced Micro Devices 功能描述: |
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