Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

M29W800DT70N1 Datasheet(PDF) 35 Page - STMicroelectronics

Part # M29W800DT70N1
Description  8 Mbit (1Mb x8 or 512Kb x16, Boot Block) 3V Supply Flash Memory
Download  41 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M29W800DT70N1 Datasheet(HTML) 35 Page - STMicroelectronics

Back Button M29W800DT70N1 Datasheet HTML 31Page - STMicroelectronics M29W800DT70N1 Datasheet HTML 32Page - STMicroelectronics M29W800DT70N1 Datasheet HTML 33Page - STMicroelectronics M29W800DT70N1 Datasheet HTML 34Page - STMicroelectronics M29W800DT70N1 Datasheet HTML 35Page - STMicroelectronics M29W800DT70N1 Datasheet HTML 36Page - STMicroelectronics M29W800DT70N1 Datasheet HTML 37Page - STMicroelectronics M29W800DT70N1 Datasheet HTML 38Page - STMicroelectronics M29W800DT70N1 Datasheet HTML 39Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 35 / 41 page
background image
35/41
M29W800DT, M29W800DB
APPENDIX C. BLOCK PROTECTION
Block protection can be used to prevent any oper-
ation from modifying the data stored in the Flash.
Each Block can be protected individually. Once
protected, Program and Erase operations on the
block fail to change the data.
There are three techniques that can be used to
control Block Protection, these are the Program-
mer technique, the In-System technique and Tem-
porary Unprotection. Temporary Unprotection is
controlled by the Reset/Block Temporary Unpro-
tection pin, RP; this is described in the Signal De-
scriptions section.
Unlike the Command Interface of the Program/
Erase Controller, the techniques for protecting and
unprotecting blocks change between different
Flash memory suppliers. For example, the tech-
niques for AMD parts will not work on STMicro-
electronics parts. Care should be taken when
changing drivers for one part to work on another.
Programmer Technique
The Programmer technique uses high (VID) volt-
age levels on some of the bus pins. These cannot
be achieved using a standard microprocessor bus,
therefore the technique is recommended only for
use in Programming Equipment.
To protect a block follow the flowchart in Figure 20,
Programmer Equipment Block Protect Flowchart.
To unprotect the whole chip it is necessary to pro-
tect all of the blocks first, then all blocks can be un-
protected at the same time. To unprotect the chip
follow Figure 21, Programmer Equipment Chip
Unprotect Flowchart. Table 29, Programmer
Technique Bus Operations, gives a summary of
each operation.
The timing on these flowcharts is critical. Care
should be taken to ensure that, where a pause is
specified, it is followed as closely as possible. Do
not abort the procedure before reaching the end.
Chip Unprotect can take several seconds and a
user message should be provided to show that the
operation is progressing.
In-System Technique
The In-System technique requires a high voltage
level on the Reset/Blocks Temporary Unprotect
pin, RP. This can be achieved without violating the
maximum ratings of the components on the micro-
processor bus, therefore this technique is suitable
for use after the Flash has been fitted to the sys-
tem.
To protect a block follow the flowchart in Figure 22,
In-System Block Protect Flowchart. To unprotect
the whole chip it is necessary to protect all of the
blocks first, then all the blocks can be unprotected
at the same time. To unprotect the chip follow Fig-
ure 23, In-System Chip Unprotect Flowchart.
The timing on these flowcharts is critical. Care
should be taken to ensure that, where a pause is
specified, it is followed as closely as possible. Do
not allow the microprocessor to service interrupts
that will upset the timing and do not abort the pro-
cedure before reaching the end. Chip Unprotect
can take several seconds and a user message
should be provided to show that the operation is
progressing.
Table 29. Programmer Technique Bus Operations, BYTE = VIH or VIL
Operation
E
G
W
Address Inputs
A0-A18
Data Inputs/Outputs
DQ15A–1, DQ14-DQ0
Block Protect
VIL
VID
VIL Pulse
A9 = VID, A12-A18 Block Address
Others = X
X
Chip Unprotect
VID
VID
VIL Pulse
A9 = VID, A12 = VIH, A15 = VIH
Others = X
X
Block Protection
Verify
VIL
VIL
VIH
A0 = VIL, A1 = VIH, A6 = VIL, A9 = VID,
A12-A18 Block Address
Others = X
Pass = XX01h
Retry = XX00h
Block Unprotection
Verify
VIL
VIL
VIH
A0 = VIL, A1 = VIH, A6 = VIH, A9 = VID,
A12-A18 Block Address
Others = X
Retry = XX01h
Pass = XX00h


Similar Part No. - M29W800DT70N1

ManufacturerPart #DatasheetDescription
logo
Numonyx B.V
M29W800DT70N1E NUMONYX-M29W800DT70N1E Datasheet
1Mb / 52P
   8-Mbit (1 Mbit x 8 or 512 Kbits x 16, boot block) 3 V supply flash memory
M29W800DT70N1F NUMONYX-M29W800DT70N1F Datasheet
1Mb / 52P
   8-Mbit (1 Mbit x 8 or 512 Kbits x 16, boot block) 3 V supply flash memory
M29W800DT70N1T NUMONYX-M29W800DT70N1T Datasheet
1Mb / 52P
   8-Mbit (1 Mbit x 8 or 512 Kbits x 16, boot block) 3 V supply flash memory
More results

Similar Description - M29W800DT70N1

ManufacturerPart #DatasheetDescription
logo
STMicroelectronics
M29W800DT70N6 STMICROELECTRONICS-M29W800DT70N6 Datasheet
651Kb / 41P
   8 Mbit (1Mb x8 or 512Kb x16, Boot Block) 3V Supply Flash Memory
M29W800DT STMICROELECTRONICS-M29W800DT Datasheet
313Kb / 42P
   8 Mbit (1Mb x8 or 512Kb x16, Boot Block) 3V Supply Flash Memory
M29F800DT STMICROELECTRONICS-M29F800DT Datasheet
332Kb / 39P
   8 Mbit (1Mb x8 or 512Kb x16, Boot Block) 5V Supply Flash Memory
M29F800AT STMICROELECTRONICS-M29F800AT Datasheet
142Kb / 21P
   8 Mbit 1Mb x8 or 512Kb x16, Boot Block Single Supply Flash Memory
M29F800DT STMICROELECTRONICS-M29F800DT_06 Datasheet
420Kb / 53P
   8 Mbit (1Mb x8 or 512Kb x16, Boot Block) 5V Supply Flash Memory
M29W800AT STMICROELECTRONICS-M29W800AT_04 Datasheet
717Kb / 40P
   8 Mbit (1Mb x8 or 512Kb x16, Boot Block) Low Voltage Single Supply Flash Memory
M29W160ET STMICROELECTRONICS-M29W160ET Datasheet
665Kb / 40P
   16 Mbit (2Mb x8 or 1Mb x16, Boot Block) 3V Supply Flash Memory
January 2004
logo
Numonyx B.V
M29W160ET NUMONYX-M29W160ET Datasheet
1Mb / 40P
   16 Mbit (2Mb x8 or 1Mb x16, Boot Block) 3V Supply Flash Memory
M29W160ET70N3E NUMONYX-M29W160ET70N3E Datasheet
813Kb / 42P
   16 Mbit (2Mb x8 or 1Mb x16, Boot Block) 3V Supply Flash Memory
logo
STMicroelectronics
M29W800AT STMICROELECTRONICS-M29W800AT Datasheet
234Kb / 33P
   8 Mbit 1Mb x8 or 512Kb x16, Boot Block Low Voltage Single Supply Flash Memory
More results


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


Datasheet Download

Go To PDF Page


Link URL




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

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   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
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com