參數(shù)資料
型號(hào)： EM39LV040-90FMC
廠商： ELAN Microelctronics Corp .
英文描述： 4M (512Kx8) Bits Flash Memory
中文描述： 4分（512Kx8）位快閃記憶體
文件頁(yè)數(shù)： 7/21頁(yè)
文件大?。?/td> 275K
代理商： EM39LV040-90FMC
EM39LV040
4M (512Kx8) Bits Flash Memory
SPECIFICATION
Hardware Data Protection
Noise/Glitch Protection
:
A WE# or CE# pulse of less than 5 ns will not initiate a
write cycle.
V
DD
Power Up/Down Detection
:
The Write operation is inhibited when V
DD
is less than
1.5V.
Write Inhibit Mode
:
Forcing OE# Low, CE# High, or WE# High will inhibit the
Write operation. This prevents inadvertent write during
power-up or power-down.
Software Data Protection (SDP)
The EM39LV040 provides the JEDEC approved Software Data Protection (SDP) scheme for
Program and Erase operations. Any Program operation requires the inclusion of the
three-byte sequence. The three-byte load sequence is used to initiate the Program operation,
providing optimal protection from inadvertent Write operations, especially during the system
power-up or power-down transition. Any Erase operation requires the inclusion of six-byte
sequence. See Table 3 below for the specific software command codes. During SDP
command sequence, invalid commands will abort the device to Read mode within T
RC
.
Software Command Sequence
1st Bus
Write Cycle
Addr
1
2nd Bus
Write Cycle
Addr
1
3rd Bus
Write Cycle
Addr
1
4th Bus
Write Cycle
Addr
1
BA
2
5th Bus
Write Cycle
Addr
1
6th Bus
Write Cycle
Addr
1
Command
Sequence
Data
Data
Data
Data
Data
Data
Byte Program
5555H AAH 2AAAH
55H
5555H
A0H
Data
Sector Erase
5555H AAH 2AAAH
55H
5555H
80H
5555H
AAH
2AAAH
55H
SA
X
3
30H
Chip Erase
5555H AAH 2AAAH
55H
5555H
80H
5555H
AAH
2AAAH
55H
5555H
10H
Software ID
Entry
4
5555H AAH 2AAAH
55H
5555H
90H
Manufacture ID
5555H AAH 2AAAH
55H
5555H
90H
0000H
7FH
Manufacture ID
5555H AAH 2AAAH
55H
5555H
90H
0003H
7FH
Manufacture ID
5555H AAH 2AAAH
55H
5555H
90H
0040H
1FH
Device ID
Software ID Exit
5
Software ID Exit
5
Notes
:
1. Address format A18-A0 (Hex) & Address A16 can be V
IL
or V
IH
, (but no other value) for the Command sequence.
2. BA = Program byte address.
3. SA
X
for Sector-Erase; uses A19-A12 address lines.
4. The device does not remain in Software Product ID mode if powered down (see Figure 9 for more information).
5. Both Software ID Exit operations are equivalent.
5555H AAH 2AAAH
55H
5555H
90H
0001H
29FH
XXH
F0H
5555H AAH 2AAAH
55H
5555H
F0H
Table 3:
Software Command Sequence
This specification is subject to change without further notice. (07.22.2004 V1.0)
Page 7 of 21
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EM39LV040-90FMI 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4M (512Kx8) Bits Flash Memory
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EM39LV088-70H 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8M Bits (1Mx8) Flash Memory
EM39LV088-70M 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8M Bits (1Mx8) Flash Memory
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