Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

AT45DB021E Datasheet(PDF) 9 Page - List of Unclassifed Manufacturers

Part # AT45DB021E
Description  2-Mbit DataFlash (with Extra 64-Kbits), 1.65V Minimum SPI Serial Flash Memory
Download  68 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ETC2 [List of Unclassifed Manufacturers]
Direct Link  
Logo ETC2 - List of Unclassifed Manufacturers

AT45DB021E Datasheet(HTML) 9 Page - List of Unclassifed Manufacturers

Back Button AT45DB021E Datasheet HTML 5Page - List of Unclassifed Manufacturers AT45DB021E Datasheet HTML 6Page - List of Unclassifed Manufacturers AT45DB021E Datasheet HTML 7Page - List of Unclassifed Manufacturers AT45DB021E Datasheet HTML 8Page - List of Unclassifed Manufacturers AT45DB021E Datasheet HTML 9Page - List of Unclassifed Manufacturers AT45DB021E Datasheet HTML 10Page - List of Unclassifed Manufacturers AT45DB021E Datasheet HTML 11Page - List of Unclassifed Manufacturers AT45DB021E Datasheet HTML 12Page - List of Unclassifed Manufacturers AT45DB021E Datasheet HTML 13Page - List of Unclassifed Manufacturers Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 68 page
background image
9
AT45DB021E
8789E–DFLASH–10/2013
5.5
Main Memory Page Read
A Main Memory Page Read allows the user to read data directly from any one of the 1,024 pages in the main memory,
bypassing the data buffer and leaving the contents of the Buffer unchanged. To start a Main Memory Page Read using
the standard DataFlash page size (264 bytes), the CS pin must first be asserted then an opcode of D2h must be clocked
into the device followed by three address bytes
(which comprise the 24-bit page and byte address sequence) and
four dummy bytes. The first 10 bits (PA9 - PA0) of the 19-bit address sequence specify which page of the main memory
array to read, and the last nine bits (BA8 - BA0) of the 19-bit address sequence specify the starting byte address within
the page. To perform a Main Memory Page Read with the binary page size (256 bytes), the opcode D2h must be clocked
into the device followed by three address bytes (A17 - A0) and four dummy bytes. The first 10 bits (A17 - A8) of the
18-bit address sequence specify which page of the main memory array to read, and the last eight bits (A7 - A0) of the
18-bit address sequence specify the starting byte address within that page. The dummy bytes that follow the address
bytes are sent to initialize the read operation. Following the dummy bytes, the additional pulses on SCK result in data
being output on the SO (Serial Output) pin.
The CS pin must remain low during the loading of the opcode, the address bytes, the dummy bytes, and the reading of
data. Unlike the Continuous Array Read command, when the end of a page in main memory is reached, the device will
continue reading back at the beginning of the same page rather than the beginning of the next page.
A low-to-high transition on the CS pin will terminate the read operation and tri-state the output pin (SO). The maximum
SCK frequency allowable for the Main Memory Page Read is defined by the fSCK specification. The Main Memory Page
Read bypasses the data buffer and leaves the contents of the Buffer unchanged.
5.6
Buffer Read
The data buffer can be accessed independently from the main memory array, and utilizing the Buffer Read command
allows data to be sequentially read directly from the Buffer. Two opcodes, D4h or D1h, can be used for the Buffer Read
command. The use of each opcode depends on the maximum SCK frequency that will be used to read data from the
Buffer. The D4h opcode can be used at any SCK frequency up to the maximum specified by fCAR while the D1h opcode
can be used for lower frequency read operations up to the maximum specified by fCAR2.
To perform a Buffer Read using the standard DataFlash buffer size (264 bytes), the opcode must be clocked into the
device followed by three address bytes comprised of 15 dummy bits and nine buffer address bits (BFA8 -BFA0). To
perform a Buffer Read using the binary buffer size (256 bytes), the opcode must be clocked into the device followed by
three address bytes comprised of 16 dummy bits and eight address bits (A7 - A0). Following the address bytes, one
dummy byte must be clocked into the device to initialize the read operation if using opcode D4h. The CS must remain low
during the loading of the opcode, the address bytes, the dummy byte (for opcode D4h only), and the reading of data.
When the end of a buffer is reached, the device will continue reading back at the beginning of the Buffer. A
low-to-high transition on the CS pin will terminate the read operation and tri-state the output pin (SO).


Similar Part No. - AT45DB021E

ManufacturerPart #DatasheetDescription
logo
Dialog Semiconductor
AT45DB021E DIALOG-AT45DB021E Datasheet
1Mb / 74P
   2-Mbit DataFlash (with Extra 64 kbits) 1.65 V Minimum SPI Serial Flash Memory
logo
Renesas Technology Corp
AT45DB021E RENESAS-AT45DB021E Datasheet
2Mb / 70P
   2-Mbit DataFlash (with Extra 64 kBits) 1.65 V Minimum SPI Serial Flash Memory
8/11/22
logo
Dialog Semiconductor
AT45DB021E-DWF DIALOG-AT45DB021E-DWF Datasheet
1Mb / 74P
   2-Mbit DataFlash (with Extra 64 kbits) 1.65 V Minimum SPI Serial Flash Memory
AT45DB021E-MHN-T DIALOG-AT45DB021E-MHN-T Datasheet
1Mb / 74P
   2-Mbit DataFlash (with Extra 64 kbits) 1.65 V Minimum SPI Serial Flash Memory
AT45DB021E-MHN-Y DIALOG-AT45DB021E-MHN-Y Datasheet
1Mb / 74P
   2-Mbit DataFlash (with Extra 64 kbits) 1.65 V Minimum SPI Serial Flash Memory
More results

Similar Description - AT45DB021E

ManufacturerPart #DatasheetDescription
logo
List of Unclassifed Man...
AT45DB041E ETC2-AT45DB041E_14 Datasheet
2Mb / 71P
   4-Mbit DataFlash (with Extra 128-Kbits), 1.65V Minimum SPI Serial Flash Memory
AT45DB041E ETC2-AT45DB041E Datasheet
2Mb / 71P
   4-Mbit DataFlash (with Extra 128-Kbits), 1.65V Minimum SPI Serial Flash Memory
AT45DB081E ETC2-AT45DB081E Datasheet
2Mb / 69P
   8-Mbit DataFlash (with Extra 256-Kbits), 1.65V Minimum SPI Serial Flash Memory
logo
Dialog Semiconductor
AT45DB021E DIALOG-AT45DB021E Datasheet
1Mb / 74P
   2-Mbit DataFlash (with Extra 64 kbits) 1.65 V Minimum SPI Serial Flash Memory
logo
Renesas Technology Corp
AT45DB021E RENESAS-AT45DB021E Datasheet
2Mb / 70P
   2-Mbit DataFlash (with Extra 64 kBits) 1.65 V Minimum SPI Serial Flash Memory
8/11/22
AT45DB041E RENESAS-AT45DB041E Datasheet
2Mb / 78P
   2-Mbit DataFlash (with Extra 64 kBits) 1.65 V Minimum SPI Serial Flash Memory
9/26/22
logo
Dialog Semiconductor
AT45DB641E DIALOG-AT45DB641E Datasheet
1Mb / 72P
   64-Mbit DataFlash (with Extra 2-Mbits), 1.7V Minimum SPI Serial Flash Memory
logo
List of Unclassifed Man...
AT45DB081E ETC2-AT45DB081E_14 Datasheet
2Mb / 70P
   8-Mbit DataFlash (with Extra 256-Kbits), 1.7V Minimum SPI Serial Flash Memory
AT45DB641E ETC2-AT45DB641E Datasheet
2Mb / 72P
   64-Mbit DataFlash (with Extra 2-Mbits), 1.7V Minimum SPI Serial Flash Memory
logo
Renesas Technology Corp
AT45DB641E RENESAS-AT45DB641E Datasheet
2Mb / 69P
   64-Mbit DataFlash (with Extra 2-Mbits), 1.7V Minimum SPI Serial Flash Memory
2/2022
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


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