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

X  

FM24C04B-GTR データシート(PDF) 5 Page - Cypress Semiconductor

部品番号 FM24C04B-GTR
部品情報  4Kb Serial 5V F-RAM Memory
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  CYPRESS [Cypress Semiconductor]
ホームページ  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

FM24C04B-GTR データシート(HTML) 5 Page - Cypress Semiconductor

  FM24C04B-GTR Datasheet HTML 1Page - Cypress Semiconductor FM24C04B-GTR Datasheet HTML 2Page - Cypress Semiconductor FM24C04B-GTR Datasheet HTML 3Page - Cypress Semiconductor FM24C04B-GTR Datasheet HTML 4Page - Cypress Semiconductor FM24C04B-GTR Datasheet HTML 5Page - Cypress Semiconductor FM24C04B-GTR Datasheet HTML 6Page - Cypress Semiconductor FM24C04B-GTR Datasheet HTML 7Page - Cypress Semiconductor FM24C04B-GTR Datasheet HTML 8Page - Cypress Semiconductor FM24C04B-GTR Datasheet HTML 9Page - Cypress Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 12 page
background image
FM24C04B
Rev. 3.0
Jan. 2012
Page 5 of 12
Figure 4. Slave Address
No word address occurs for a read operation. Reads
always use the lower 8-bits that are held internally in
the address latch and the 9
th address bit is part of the
slave address. Reads always begin at the address
following the previous access. A random read address
can be loaded by doing a write operation as explained
below.
After transmission of each data byte, just prior to the
acknowledge, the FM24C04B increments the internal
address latch. This allows the next sequential byte to
be accessed with no additional addressing. After the
last address (1FFh) is reached, the address latch will
roll over to 000h. There is no limit to the number of
bytes that can be accessed with a single read or write
operation.
Data Transfer
After all address information has been transmitted,
data transfer between the bus master and the
FM24C04B can begin. For a read operation the
FM24C04B will place 8 data bits on the bus then wait
for an acknowledge. If the acknowledge occurs, the
next sequential byte will be transferred. If the
acknowledge is not sent, the read operation is
concluded. For a write operation, the FM24C04B will
accept 8 data bits from the master then send an
acknowledge. All data transfer occurs MSB (most
significant bit) first.
Memory Operation
The FM24C04B is designed to operate in a manner
very similar to other 2-wire interface memory
products. The major differences result from the
higher performance write capability of FRAM
technology. These improvements result in some
differences between the FM24C04B and a similar
configuration EEPROM during writes. The complete
operation for both writes and reads is explained
below.
Write Operation
All writes begin with a slave address then a word
address. The bus master indicates a write operation
by setting the LSB of the Slave address to a 0. After
addressing, the bus master sends each byte of data to
the
memory
and
the
memory
generates
an
acknowledge condition. Any number of sequential
bytes may be written. If the end of the address range
is reached internally, the address counter will wrap
from 1FFh to 000h.
Unlike other nonvolatile memory technologies, there
is no write delay with FRAM. The entire memory
cycle occurs in less time than a single bus clock.
Therefore any operation including read or write can
occur immediately following a write. Acknowledge
polling, a technique used with EEPROMs to
determine if a write is complete is unnecessary and
will always return a done condition.
An actual memory array write occurs after the 8
th
data bit is transferred. It will be complete before the
acknowledge is sent. Therefore if the user desires to
abort a write without altering the memory contents,
this should be done using a start or stop condition
prior to the 8
th data bit. The FM24C04B needs no
page buffering.
The memory array can be write protected using the
WP pin. Pulling WP high will disable writes to the
entire array. The FM24C04B will not acknowledge
data bytes that are written when write protect is
asserted. In addition, the address counter will not
increment if writes are attempted. Pulling WP low
(VSS) will deactivate this feature.
Figures 5 and 6 below illustrate both a single-byte
and multiple- byte write cases.


同様の部品番号 - FM24C04B-GTR

メーカー部品番号データシート部品情報
logo
Ramtron International C...
FM24C04B-GTR RAMTRON-FM24C04B-GTR Datasheet
293Kb / 12P
   4Kb Serial 5V F-RAM Memory
logo
Cypress Semiconductor
FM24C04B-GTR CYPRESS-FM24C04B-GTR Datasheet
324Kb / 13P
   4Kb Serial 5V F-RAM Memory
More results

同様の説明 - FM24C04B-GTR

メーカー部品番号データシート部品情報
logo
Ramtron International C...
FM25040B RAMTRON-FM25040B Datasheet
313Kb / 13P
   4Kb Serial 5V F-RAM Memory
logo
Cypress Semiconductor
FM25040B CYPRESS-FM25040B Datasheet
449Kb / 13P
   4Kb Serial 5V F-RAM Memory
FM24C04B CYPRESS-FM24C04B_13 Datasheet
324Kb / 13P
   4Kb Serial 5V F-RAM Memory
logo
Ramtron International C...
FM25040C RAMTRON-FM25040C Datasheet
266Kb / 13P
   4Kb Serial 5V F-RAM Memory
FM24C04C RAMTRON-FM24C04C Datasheet
261Kb / 12P
   4Kb Serial 5V F-RAM Memory
FM24C04B RAMTRON-FM24C04B Datasheet
293Kb / 12P
   4Kb Serial 5V F-RAM Memory
logo
Cypress Semiconductor
FM25040B CYPRESS-FM25040B_13 Datasheet
402Kb / 14P
   4Kb Serial 5V F-RAM Memory
FM25040B-GA CYPRESS-FM25040B-GA Datasheet
419Kb / 14P
   Automotive Temp. 4Kb Serial 5V F-RAM Memory
FM24CL04B CYPRESS-FM24CL04B_13 Datasheet
325Kb / 13P
   4Kb Serial 3V F-RAM Memory
logo
Ramtron International C...
FM24CL04B RAMTRON-FM24CL04B Datasheet
287Kb / 12P
   4Kb Serial 3V F-RAM Memory
More results


Html Pages

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


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