Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

FM25L04B-DG Datasheet(PDF) 5 Page - Ramtron International Corporation

No. de pieza FM25L04B-DG
Descripción Electrónicos  4Kb Serial 3V F-RAM Memory
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  RAMTRON [Ramtron International Corporation]
Página de inicio  http://www.ramtron.com
Logo RAMTRON - Ramtron International Corporation

FM25L04B-DG Datasheet(HTML) 5 Page - Ramtron International Corporation

  FM25L04B-DG Datasheet HTML 1Page - Ramtron International Corporation FM25L04B-DG Datasheet HTML 2Page - Ramtron International Corporation FM25L04B-DG Datasheet HTML 3Page - Ramtron International Corporation FM25L04B-DG Datasheet HTML 4Page - Ramtron International Corporation FM25L04B-DG Datasheet HTML 5Page - Ramtron International Corporation FM25L04B-DG Datasheet HTML 6Page - Ramtron International Corporation FM25L04B-DG Datasheet HTML 7Page - Ramtron International Corporation FM25L04B-DG Datasheet HTML 8Page - Ramtron International Corporation FM25L04B-DG Datasheet HTML 9Page - Ramtron International Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 14 page
background image
FM25L04B - 4Kb 3V SPI F-RAM
Rev. 1.3
Feb. 2011
Page 5 of 14
Data Transfer
All data transfers to and from the FM25L04B occur
in 8-bit groups. They are synchronized to the clock
signal (SCK), and they transfer most significant bit
(MSB) first. Serial inputs are registered on the rising
edge of SCK. Outputs are driven from the falling
edge of SCK.
Command Structure
There are six commands called op-codes that can be
issued by the bus master to the FM25L04B. They are
listed in the table below. These op-codes control the
functions performed by the memory. They can be
divided into three categories. First, there are
commands that have no subsequent operations. They
perform a single function such as to enable a write
operation. Second are commands followed by one
byte, either in or out. They operate on the status
register. The third group includes commands for
memory transactions followed by address and one or
more bytes of data.
Table 1. Op-code Commands
Name
Description
Op-code
WREN
Set Write Enable Latch
0000 0110b
WRDI
Write Disable
0000 0100b
RDSR
Read Status Register
0000 0101b
WRSR
Write Status Register
0000 0001b
READ
Read Memory Data
0000 A011b
WRITE
Write Memory Data
0000 A010b
WREN - Set Write Enable Latch
The FM25L04B will power up with writes disabled.
The WREN command must be issued prior to any
write operation. Sending the WREN op-code will
allow the user to issue subsequent op-codes for
write operations. These include writing the status
register and writing the memory.
Sending the WREN op-code causes the internal
Write Enable Latch to be set. A flag bit in the status
register, called WEL, indicates the state of the latch.
WEL=1 indicates that writes are permitted.
Attempting to write the WEL bit in the status
register has no effect. Completing any write
operation will automatically clear the write-enable
latch and prevent further writes without another
WREN command. Figure 5 below illustrates the
WREN command bus configuration.
WRDI - Write Disable
The WRDI command disables all write activity by
clearing the Write Enable Latch. The user can verify
that writes are disabled by reading the WEL bit in
the status register and verifying that WEL=0. Figure
6 illustrates the WRDI command bus configuration.
Hi-Z
0
1
2
3
4
5
6
7
0
0
0
0
0
1
1
0
CS
SCK
SI
SO
Figure 5. WREN Bus Configuration
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


Número de pieza similar - FM25L04B-DG

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Cypress Semiconductor
FM25L04B-DG CYPRESS-FM25L04B-DG Datasheet
469Kb / 14P
   4Kb Serial 3V F-RAM Memory
FM25L04B-DGTR CYPRESS-FM25L04B-DGTR Datasheet
469Kb / 14P
   4Kb Serial 3V F-RAM Memory
More results

Descripción similar - FM25L04B-DG

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Cypress Semiconductor
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
logo
Cypress Semiconductor
FM25L04B CYPRESS-FM25L04B Datasheet
412Kb / 14P
   4Kb Serial 3V F-RAM Memory
FM24CL04B CYPRESS-FM24CL04B Datasheet
334Kb / 12P
   4Kb Serial 3V F-RAM Memory
FM25L04B CYPRESS-FM25L04B Datasheet
469Kb / 14P
   4Kb Serial 3V F-RAM Memory
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
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
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