Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

TMS28F400AZB80CDCDL Datasheet(PDF) 8 Page - Texas Instruments

Part # TMS28F400AZB80CDCDL
Description  524288 BY 8-BIT/262144 BY 16-BIT AUTO-SELECT BOOT-BLOCK FLASH MEMORIES
Download  80 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS28F400AZB80CDCDL Datasheet(HTML) 8 Page - Texas Instruments

Back Button TMS28F400AZB80CDCDL Datasheet HTML 4Page - Texas Instruments TMS28F400AZB80CDCDL Datasheet HTML 5Page - Texas Instruments TMS28F400AZB80CDCDL Datasheet HTML 6Page - Texas Instruments TMS28F400AZB80CDCDL Datasheet HTML 7Page - Texas Instruments TMS28F400AZB80CDCDL Datasheet HTML 8Page - Texas Instruments TMS28F400AZB80CDCDL Datasheet HTML 9Page - Texas Instruments TMS28F400AZB80CDCDL Datasheet HTML 10Page - Texas Instruments TMS28F400AZB80CDCDL Datasheet HTML 11Page - Texas Instruments TMS28F400AZB80CDCDL Datasheet HTML 12Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 80 page
background image
TMS28F004Axy, TMS28F400Axy
524288 BY 8-BIT/262144 BY 16-BIT
AUTO-SELECT BOOT-BLOCK FLASH MEMORIES
SMJS829A – JANUARY 1996 – REVISED AUGUST 1997
8
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
boot-block data protection
The 16K-byte boot block can be used to store key system data that is seldom changed in normal operation. Data
in this block can be secured by using different combinations of the reset / power-down pin (RP), the write protect
pin (WP) and VPP supply levels. Table 2 provides a list of these combinations.
parameter block
Two parameter blocks of 8K bytes each can be used like a scratch pad to store frequently updated data.
Alternatively, the parameter blocks can be used for additional boot- or main-block data. If a parameter block is
used to store additional boot-block data, caution must be exercised because the parameter block does not have
the boot-block data-protection safety feature.
main block
Primary memory on the TMS28F400Axy is located in four main blocks. Three of the blocks have storage
capacity for 128K bytes and the fourth block has storage capacity for 96K bytes.
data protection
Data is secured or unsecured by using different combinations of the reset / power-down pin (RP), the write
protect pin (WP), and VPP supply levels. Table 2 provides a list of these combinations.
There are two configurations to secure the entire memory against inadvertant alteration of data. The VPP supply
pin can be held below the VPP lock-out voltage level (VPPLK) or the reset/deep power-down pin (RP) can be
pulled to a logic-low level. Note if RP is held low, the device resets which means it powers down and, therefore,
cannot be read. Typically this pin tied to the system reset for additional protection during system power up.
The boot block sector has an additional security feature through the WP pin (’ASy, ’AEy, and ’AFy device
configurations only). When the RP pin is at a logic-high level, the WP pin controls whether the boot block sector
is protected. When WP is held at the logic-low level, the boot block is protected. When WP is held at the
logic-high level, the boot block is unprotected along with the rest of the other sectors. Alternatively, the entire
memory for all voltage configurations can be unprotected by pulling the RP pin to VHH (12 V).
Table 2. Data-Protection Combinations
’ASy, ’AEy, OR ’AFy
’AMy OR ’AZy
DATA PROTECTION PROVIDED
VPP
RP
WP†
VPP
RP
WP†
All blocks locked
VIL
X
X
VIL
X
X
All blocks locked (reset)
X
VIL
X
X
VIL
X
All blocks unlocked
>VPPLK
VHH
X
VHH
VHH
X
>VPPLK
VIH
VIH
Only boot block locked
>VPPLK
VIH
VIL
VHH
VIH
X
† For the TMS28F400AZy and TMS28F400AMy 12-V VPP-only products, the WP pin is disabled and can be left
floating. To unlock blocks, RP must be at VHH.
command-state machine (CSM)
Commands are issued to the CSM using standard microprocessor write timings. The CSM acts as an interface
between the external microprocessor and the internal WSM. The available commands are listed in Table 3 and
the descriptions of these commands are shown in Table 4. When a program or erase command is issued to the
CSM, the WSM controls the internal sequences and the CSM responds only to status reads. After the WSM
completes its task, the WSM status bit (SB7) is set to a logic-high level (1), allowing the CSM to respond to the
full command set again.


Similar Part No. - TMS28F400AZB80CDCDL

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TMS28F400AZB TI1-TMS28F400AZB Datasheet
1Mb / 80P
[Old version datasheet]   AUTO-SELECT BOOT-BLOCK FLASH MEMORIES
More results

Similar Description - TMS28F400AZB80CDCDL

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TMS28F004AEB TI1-TMS28F004AEB Datasheet
1Mb / 80P
[Old version datasheet]   524288 BY 8-BIT/262144 BY 16-BIT AUTO-SELECT BOOT-BLOCK FLASH MEMORIES
TMS28F002AXY TI-TMS28F002AXY Datasheet
1Mb / 79P
[Old version datasheet]   262144 BY 8-BIT/131072 BY 16-BIT AUTO-SELECT BOOT-BLOCK FLASH MEMORIES
TMS29F400B TI-TMS29F400B Datasheet
670Kb / 51P
[Old version datasheet]   524288 BY 8-BIT/262144 BY 16-BIT FLASH MEMORIES
TMS28F200BZT TI-TMS28F200BZT Datasheet
405Kb / 29P
[Old version datasheet]   262144 BY 8-BIT/131072 BY 16-BIT BOOT-BLOCK FLASH MEMORIES
TMS28F400BZT TI-TMS28F400BZT Datasheet
404Kb / 29P
[Old version datasheet]   8-BIT/262144 BY 16-BIT BOOT-BLOCK FLASH MEMORIES
TMS29F800T TI-TMS29F800T Datasheet
685Kb / 51P
[Old version datasheet]   1048576 BY 8-BIT/ 524288 BY 16-BIT FLASH MEMORIES
TMS28F008AEB TI1-TMS28F008AEB Datasheet
696Kb / 52P
[Old version datasheet]   1 048 576 BY 8-BIT/524 288 BY 16-BIT AUTO-SELECT BOOT-BLOCK FLASH MEMORIES
TMS28F008AXY TI-TMS28F008AXY Datasheet
714Kb / 52P
[Old version datasheet]   1 048 576 BY 8-BIT/524 288 BY 16-BIT AUTO-SELECT BOOT-BLOCK FLASH MEMORIES
TMS29F002B TI1-TMS29F002B Datasheet
453Kb / 38P
[Old version datasheet]   262144 BY 8-BIT FLASH MEMORIES
TMS29F002RB TI1-TMS29F002RB Datasheet
517Kb / 41P
[Old version datasheet]   262144 BY 8-BIT FLASH MEMORIES
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 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80


Datasheet Download

Go To PDF Page


Link URL




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

About Alldatasheet   |   Advertisement   |   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