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參數(shù)資料
| 型號(hào)： | L640DU90NI |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | 64 Megabit (4 M x 16-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO⑩ Control |
| 中文描述： | 64兆位（4個(gè)M x 16位），3.0伏的CMOS只均勻部門閃存與VersatileIO⑩控制記憶 |
| 文件頁(yè)數(shù)： | 23/57頁(yè) |
| 文件大?。?/td> | 885K |
| 代理商： | L640DU90NI |
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January22,2007 22366C6
Am29LV640D/Am29LV641D
21
D A T A S H E E T
Write Pulse “Glitch” Protection
Noise pulses of less than 5 ns (typical) on OE#, CE#
or WE#, do not initiate a write cycle.
Logical Inhibit
Write cycles are inhibited by holding any one of OE# =
V
IL
, CE# = V
IH
or WE# = V
IH
. To initiate a write cycle,
CE# and WE# must be a logical zero while OE# is a
logical one.
Power-Up Write Inhibit
If WE# = CE# = V
IL
and OE# = V
IH
during power up,
the device does not accept commands on the rising
edge of WE#. The internal state machine is automati-
cally reset to the read mode on power-up.
COMMON FLASH MEMORY INTERFACE (CFI)
The Common Flash Interface (CFI) specification out-
lines device and host system software interrogation
handshake, which allows specific vendor-specified
software algorithms to be used for entire families of
devices. Software support can then be device-inde-
pendent, JEDEC ID-independent, and forward-and
backward-compatible for the specified flash device
families. Flash vendors can standardize their existing
interfaces for long-term compatibility.
This device enters the CFI Query mode when the sys-
tem writes the CFI Query command, 98h, to address
55h, any time the device is ready to read array data.
The system reads CFI information at the addresses
given in
Table 6 on page 21
to
Table 9 on page 23
. To
terminate reading CFI data, the system must write the
reset command.
The system can also write the CFI query command
when the device is in the autoselect mode. The device
enters the CFI query mode, and the system can read
CFI data at the addresses given in
Table 6 on page 21
to
Table 9 on page 23
The system must write the reset
command to return the device to the autoselect mode.
For further information, please refer to the CFI Specifi-
cation and CFI Publication 100, available via the World
Wide Web at
http://www.amd.com/products/nvd/over-
view/cfi.html
. Alternatively, contact an AMD represen-
tative for copies of these documents.
Table 6.
CFI Query Identification String
Addresses (x16)
Data
Description
10h
11h
12h
0051h
0052h
0059h
Query Unique ASCII string “QRY”
13h
14h
0002h
0000h
Primary OEM Command Set
15h
16h
0040h
0000h
Address for Primary Extended Table
17h
18h
0000h
0000h
Alternate OEM Command Set (00h = none exists)
19h
1Ah
0000h
0000h
Address for Alternate OEM Extended Table (00h = none exists)
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| L640DU90RF | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:64 Megabit (4 M x 16-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO⑩ Control |
| L640DU90RI | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:64 Megabit (4 M x 16-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO⑩ Control |
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| L640GU53RI | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:64 Megabit (4 M x 16-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileI/O⑩ Control |
| L640GU73PI | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:64 Megabit (4 M x 16-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileI/O⑩ Control |
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