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

X  

FM24C04B-G データシート(PDF) 4 Page - Ramtron International Corporation

部品番号 FM24C04B-G
部品情報  4Kb Serial 5V F-RAM Memory
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  RAMTRON [Ramtron International Corporation]
ホームページ  http://www.ramtron.com
Logo RAMTRON - Ramtron International Corporation

FM24C04B-G データシート(HTML) 4 Page - Ramtron International Corporation

  FM24C04B-G Datasheet HTML 1Page - Ramtron International Corporation FM24C04B-G Datasheet HTML 2Page - Ramtron International Corporation FM24C04B-G Datasheet HTML 3Page - Ramtron International Corporation FM24C04B-G Datasheet HTML 4Page - Ramtron International Corporation FM24C04B-G Datasheet HTML 5Page - Ramtron International Corporation FM24C04B-G Datasheet HTML 6Page - Ramtron International Corporation FM24C04B-G Datasheet HTML 7Page - Ramtron International Corporation FM24C04B-G Datasheet HTML 8Page - Ramtron International Corporation FM24C04B-G Datasheet HTML 9Page - Ramtron International Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 12 page
background image
FM24C04B
Rev. 1.3
Feb. 2011
Page 4 of 12
Figure 3. Data Transfer Protocol
Stop Condition
A Stop condition is indicated when the bus master
drives SDA from low to high while the SCL signal is
high. All operations must end with a Stop condition. If
an operation is pending when a stop is asserted, the
operation will be aborted. The master must have
control of SDA (not a memory read) in order to assert
a Stop condition.
Start Condition
A Start condition is indicated when the bus master
drives SDA from high to low while the SCL signal is
high. All read and write transactions begin with a Start
condition. An operation in progress can be aborted by
asserting a Start condition at any time. Aborting an
operation using the Start condition will ready the
FM24C04B for a new operation.
If during operation the power supply drops below the
specified VDD minimum, the system should issue a
Start condition prior to performing another operation.
Data/Address Transfer
All data transfers (including addresses) take place
while the SCL signal is high. Except under the two
conditions described above, the SDA signal should not
change while SCL is high.
Acknowledge
The Acknowledge takes place after the 8th data bit has
been transferred in any transaction. During this state
the transmitter should release the SDA bus to allow the
receiver to drive it. The receiver drives the SDA signal
low to acknowledge receipt of the byte. If the receiver
does not drive SDA low, the condition is a No-
Acknowledge and the operation is aborted.
The receiver could fail to acknowledge for two distinct
reasons. First, if a byte transfer fails, the No-
Acknowledge ends the current operation so that the
device can be addressed again. This allows the last
byte to be recovered in the event of a communication
error. Second and most common, the receiver does
not acknowledge the data to deliberately end an
operation. For example, during a read operation, the
FM24C04B will continue to place data onto the bus
as long as the receiver sends acknowledges (and
clocks). When a read operation is complete and no
more data is needed, the receiver must not
acknowledge
the
last
byte.
If
the
receiver
acknowledges the last byte, this will cause the
FM24C04B to attempt to drive the bus on the next
clock while the master is sending a new command
such as a Stop command.
Slave Address
The first byte that the FM24C04B expects after a
start condition is the slave address. As shown in
Figure 4, the slave address contains the device type,
the device select, the page of memory to be
accessed, and a bit that specifies if the transaction is
a read or a write.
Bits 7-4 are the device type and should be set to
1010b for the FM24C04B. The device type allows
other types of functions to reside on the 2-wire bus
within an identical address range. Bits 3-2 are the
device address. If bit 3 matches the A2 pin and bit 2
matches the A1 pin the device will be selected. Bit 1
is the page select. It specifies the 256-byte block of
memory that is targeted for the current operation. Bit
0 is the read/write bit. A 0 indicates a write
operation.
Word Address
After the FM24C04B (as receiver) acknowledges the
slave ID, the master will place the word address on
the bus for a write operation. The word address is
the lower 8-bits of the address to be combined with
the 1-bit page select to specify exactly the byte to be
written. The complete 9-bit address is latched
internally.


同様の部品番号 - FM24C04B-G

メーカー部品番号データシート部品情報
logo
Cypress Semiconductor
FM24C04B-G CYPRESS-FM24C04B-G Datasheet
335Kb / 12P
   4Kb Serial 5V F-RAM Memory
FM24C04B-G CYPRESS-FM24C04B-G Datasheet
324Kb / 13P
   4Kb Serial 5V F-RAM Memory
FM24C04B-GTR CYPRESS-FM24C04B-GTR Datasheet
335Kb / 12P
   4Kb Serial 5V F-RAM Memory
FM24C04B-GTR CYPRESS-FM24C04B-GTR Datasheet
324Kb / 13P
   4Kb Serial 5V F-RAM Memory
More results

同様の説明 - FM24C04B-G

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
logo
Cypress Semiconductor
FM24C04B CYPRESS-FM24C04B Datasheet
335Kb / 12P
   4Kb Serial 5V F-RAM Memory
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