Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.NET

X  

Preview PDF Download HTML

EN29LV320C Datasheet(HTML) 14 Page - Eon Silicon Solution Inc.

Part No. EN29LV320C
Description  32 Megabit (4096K x 8-bit / 2048K x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only
Download  49 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  EON [Eon Silicon Solution Inc.]
Homepage  http://www.essi.com.tw
Logo 

EN29LV320C Datasheet(HTML) 14 Page - Eon Silicon Solution Inc.

Zoom Inzoom in Zoom Outzoom out
Go To Page :
/ 49 page
background image
This Data Sheet may be revised by subsequent versions
© 2004 Eon Silicon Solution, Inc.,
www.eonssi.com
or modifications due to changes in technical specifications.
14
EN29LV320C
Rev. B, Issue Date: 2011/05/13
Write Protect / Accelerated Program (WP# / ACC)
The WP#/ACC pin provides two functions. The Write Protect (WP#) function provides a hardware meth-
od of protecting the outermost two 8K-byte Boot Sector. The ACC function allows faster manufacturing
throughput at the factory, using an external high voltage.
When WP#/ACC is Low, the device protects the outermost two 8K-byte Boot Sector; no matter the
sectors are protected or unprotected using the method described in “Sector/Sector Group Protection &
Chip Unprotection”, Program and Erase operations in these sectors are ignored.
When WP#/ACC is High, the device reverts to the previous protection status of the outermost two 8K-
byte boot sector. Program and Erase operations can now modify the data in the two outermost 8K-byte
Boot Sector unless the sector is protected using Sector Protection.
When WP#/ACC is raised to VHH the memory automatically enters the Accelerated Program mode, this
mode permit the system to skip the normal command unlock sequences and program byte/word
locations directly to reduces the time required for program operation. When WP#/ACC returns to VIH or
VIL, normal operation resumes. The transitions from VIH or VIL to VHH and from VHH to VIH or VIL must be
slower than tBVHHB, see Figure 11.
Note that the WP#/ACC pin must not be left floating or unconnected.
In addition, WP#/ACC pin
must not be at VHH for operations other than accelerated programming. It could cause the device to be
damaged.
Never raise this pin to VHH from any mode except Read mode. Otherwise the memory may be left in an
indeterminate state.
A 0.1µF 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 Accelerated Program mode.
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.
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.


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49 


Datasheet Download




Link URL



Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Bookmark   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn