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参数资料
| 型号： | EN29LV640T-90BIP |
| 厂商： | Eon Silicon Solution Inc. |
| 英文描述： | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| 中文描述： | 64兆位（8米× 8位/分x 16位）闪存引导扇区闪存，CMOS 3.0伏，只 |
| 文件页数： | 11/53页 |
| 文件大小： | 495K |
| 代理商： | EN29LV640T-90BIP |
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This Data Sheet may be revised by subsequent versions
2004 Eon Silicon Solution, Inc., www.essi.com.tw
or modifications due to changes in technical specifications.
19
EN29LV640T/B
Rev. B, Issue Date: 2007/05/16
A 0.1F capacitor should be connected between the WP#/ACC pin and the VSS Ground pin to decouple
the current surges from the power supply. The PCB track widths must be sufficient to carry the currents
required during Unlock Bypass Program.
Temporary Sector Unprotect
This feature allows temporary unprotection of previously protected
sector groups to change data while in-system.
The Temporary
Sector Unprotect mode is activated by setting the RESET# pin to
VBIDB.
During this mode, formerly protected sectors can be
programmed or erased by simply selecting the sector addresses.
Once VBIDB is removed from the RESET# pin, all the previously
protected sectors are protected again.
See accompanying
flowchart and figure 10 for more timing details.
COMMON FLASH INTERFACE (CFI)
The common flash interface (CFI) specification outlines device and host systems software
interrogation handshake, which allows specific vendor-specified software algorithms to be used for
entire families of devices.
Software support can then be device-independent, 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 system writes the CFI Query command, 98h, to
address 55h in word mode (or address AAh in byte mode), any time the device is ready to read
array data.
The system can read CFI information at the addresses given in Tables 5-8.In word mode, the upper
address bits (A7–MSB) must be all zeros. 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
Tables 5–8. The system must write the reset command to return the device to the autoselect mode.
Table 5. CFI Query Identification String
Addresses
(Word Mode)
Adresses
(Byte Mode)
Data
Description
10h
11h
12h
20h
22h
24h
0051h
0052h
0059h
Query Unique ASCII string “QRY”
13h
14h
26h
28h
0002h
0000h
Primary OEM Command Set
15h
16h
2Ah
2Ch
0040h
0000h
Address for Primary Extended Table
17h
18h
2Eh
30h
0000h
Alternate OEM Command set (00h = none exists)
19h
1Ah
32h
34h
0000h
Address for Alternate OEM Extended Table (00h = none exists)
Start
Reset#=V
B
IDB B
(note 1)B
Perform Erase or Program
Operations
RESET#=V
B
IHB
Temporary Sector Unprotect
Completed
B
(note 2)
Notes:
1. All protected sectors are unprotected. (If
WP#/ACC=V
B
ILB, outermost boot sectors will remain
protected.)
2. Previously protected sectors are protected again.
相关PDF资料 |
PDF描述 |
|---|---|
| EN29LV640T-90BI | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90BP | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90B | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90TIP | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90TI | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
相关代理商/技术参数 |
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| EN29LV800AB-70TC | 制造商:Eon Silicon Solution Inc 功能描述: |
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| EN29LV800CT-70TIP | 制造商:EON SILICON SOLUTION INC 功能描述:8mb TSOP 70ns nor flash |
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| EN2-B1H1 | 制造商:NEC 制造商全称:NEC 功能描述:AUTOMOTIVE RELAYS (Twin, Single) Relays |
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