データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

FM25W256-G データシート(PDF) 6 Page - List of Unclassifed Manufacturers

部品番号 FM25W256-G
部品情報  256Kb FRAM Wide Voltage Serial Memory
Download  13 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  ETC1 [List of Unclassifed Manufacturers]
ホームページ  
Logo ETC1 - List of Unclassifed Manufacturers

FM25W256-G データシート(HTML) 6 Page - List of Unclassifed Manufacturers

Back Button FM25W256-G Datasheet HTML 2Page - List of Unclassifed Manufacturers FM25W256-G Datasheet HTML 3Page - List of Unclassifed Manufacturers FM25W256-G Datasheet HTML 4Page - List of Unclassifed Manufacturers FM25W256-G Datasheet HTML 5Page - List of Unclassifed Manufacturers FM25W256-G Datasheet HTML 6Page - List of Unclassifed Manufacturers FM25W256-G Datasheet HTML 7Page - List of Unclassifed Manufacturers FM25W256-G Datasheet HTML 8Page - List of Unclassifed Manufacturers FM25W256-G Datasheet HTML 9Page - List of Unclassifed Manufacturers FM25W256-G Datasheet HTML 10Page - List of Unclassifed Manufacturers Next Button
Zoom Inzoom in Zoom Outzoom out
 6 / 13 page
background image
FM25W256
Rev. 1.0
Aug. 2004
Page 6 of 13
CS
SCK
SI
SO
Hi-Z
0
1
2
3
4
5
6
7
0
0
0
0
0
1
0
0
Figure 6. WRDI Bus Configuration
RDSR - Read Status Register
The RDSR command allows the bus master to verify
the contents of the Status register. Reading Status
provides information about the current state of the
write protection features. Following the RDSR op-
code, the FM25W256 will return one byte with the
contents of the Status register. The Status register is
described in detail in a later section.
WRSR – Write Status Register
The WRSR command allows the user to select
certain write protection features by writing a byte to
the Status register. Prior to issuing a WRSR
command, the /WP pin must be high or inactive.
Prior to sending the WRSR command, the user must
send a WREN command to enable writes. Note that
executing a WRSR command is a write operation
and therefore clears the Write Enable Latch.
Figure 7. RDSR Bus Configuration
Figure 8. WRSR Bus Configuration
Status Register & Write Protection
The write protection features of the FM25W256 are
multi-tiered. Taking the /WP pin to a logic low state
is the hardware write protect function. All write
operations are blocked when /WP is low. To write the
memory with /WP high, a WREN op-code must first
be issued. Assuming that writes are enabled using
WREN and by /WP, writes to memory are controlled
by the Status register. As described above, writes to
the status register are performed using the WRSR
command and subject to the /WP pin. The Status
register is organized as follows.
Table 2. Status Register
Bit
7
6
5
4
3
2
1
0
Name
WPEN
0
0
0
BP1
BP0
WEL
0
Bits 0 and 4-6 are fixed at 0 and cannot be modified.
Note that bit 0 (Ready in EEPROMs) is unnecessary
as the FRAM writes in real-time and is never busy.
The BP1 and BP0 control software write protection
features. They are nonvolatile! The WEL flag
indicates the state of the Write Enable Latch.
Attempting to directly write the WEL bit in the
status register has no effect on its state. This bit is


同様の部品番号 - FM25W256-G

メーカー部品番号データシート部品情報
logo
Ramtron International C...
FM25W256-G RAMTRON-FM25W256-G Datasheet
297Kb / 13P
   256Kb Wide Voltage SPI F-RAM
logo
Cypress Semiconductor
FM25W256-G CYPRESS-FM25W256-G Datasheet
453Kb / 13P
   256Kb Wide Voltage SPI F-RAM
FM25W256-G CYPRESS-FM25W256-G Datasheet
411Kb / 14P
   256Kb Wide Voltage SPI F-RAM
FM25W256-G CYPRESS-FM25W256-G Datasheet
416Kb / 16P
   256Kb Wide Voltage SPI F-RAM
logo
Ramtron International C...
FM25W256-GTR RAMTRON-FM25W256-GTR Datasheet
297Kb / 13P
   256Kb Wide Voltage SPI F-RAM
More results

同様の説明 - FM25W256-G

メーカー部品番号データシート部品情報
logo
Ramtron International C...
FM24C256 RAMTRON-FM24C256_05 Datasheet
98Kb / 12P
   256Kb FRAM Serial Memory
logo
List of Unclassifed Man...
FM24C256 ETC1-FM24C256 Datasheet
102Kb / 13P
   256Kb FRAM Serial Memory
FM25256 ETC-FM25256 Datasheet
120Kb / 13P
   256Kb FRAM Serial 5V Memory
logo
Ramtron International C...
FM25L256B RAMTRON-FM25L256B Datasheet
148Kb / 14P
   256Kb FRAM Serial 3V Memory
FM25256B RAMTRON-FM25256B Datasheet
134Kb / 13P
   256Kb FRAM Serial 5V Memory
logo
List of Unclassifed Man...
FM25L256 ETC-FM25L256 Datasheet
152Kb / 14P
   256Kb FRAM Serial 3V Memory
logo
Ramtron International C...
FM25L256 RAMTRON-FM25L256 Datasheet
148Kb / 14P
   256Kb FRAM Serial 3V Memory - Extended Temp
FM18L08 RAMTRON-FM18L08_07 Datasheet
126Kb / 13P
   256Kb Bytewide FRAM Memory
logo
List of Unclassifed Man...
FM1808 ETC-FM1808 Datasheet
89Kb / 12P
   256Kb Bytewide FRAM Memory
FM18L08 ETC-FM18L08 Datasheet
80Kb / 11P
   256Kb 2.7-3.6V Bytewide FRAM Memory
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
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