Motor de Búsqueda de Datasheet de Componentes Electrónicos
Selected language     Spanish  ▼
Nombre de pieza
         Descripción


CAT25C128LT3 Datasheet(Hoja de datos) 6 Page - Catalyst Semiconductor

No. de Pieza. CAT25C128LT3
Descripción  128K/256K-Bit SPI Serial CMOS EEPROM
Descarga  12 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Fabricante  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo 

 6 page
background image
CAT25C128/256
6
Document No. 1018, Rev. I
Protected
Unprotected
Status
WPEN
WP
WP
WP
WP
WP
WEL
Blocks
Blocks
Register
0
X
0
Protected
Protected
Protected
0
X
1
Protected
Writable
Writable
1
Low
0
Protected
Protected
Protected
1
Low
1
Protected
Writable
Protected
X
High
0
Protected
Protected
Protected
X
High
1
Protected
Writable
Writable
WRITE PROTECT ENABLE OPERATION
WP
WP
WP
WP
WP: Write Protect
WP is the Write Protect pin. The Write Protect pin will
allow normal read/write operations when held high.
When
WP is tied low and the WPEN bit in the status
register is set to “1”, all write operations to the status
register are inhibited.
WP going low while CS is still low
will interrupt a write to the status register. If the internal
write cycle has already been initiated,
WP going low will
have no effect on any write operation to the status
register. The
WP pin function is blocked when the WPEN
bit is set to 0.
HOLD
HOLD
HOLD
HOLD
HOLD: Hold
The
HOLD pin is used to pause transmission to the
CAT25C128/256 while in the middle of a serial sequence
without having to re-transmit entire sequence at a later
time. To pause,
HOLD must be brought low while SCK is
low. The SO pin is in a high impedance state during the
time the part is paused, and transitions on the SI pins will
be ignored. To resume communication,
HOLD is brought
high, while SCK is low.
(HOLD should be held high any
time this function is not being used.)
HOLD may be tied
high directly to Vcc or tied to Vcc through a resistor. Figure
9 illustrates hold timing sequence.
STATUS REGISTER
The Status Register indicates the status of the device.
The
RDY (Ready) bit indicates whether the CAT25C128/
256 is busy with a write operation. When set to 1 a write
cycle is in progress and when set to 0 the device
indicates it is ready. This bit is read only.
The WEL (Write Enable) bit indicates the status of the
write enable latch . When set to 1, the device is in a Write
Enable state and when set to 0 the device is in a Write
Disable state. The WEL bit can only be set by the WREN
instruction and can be reset by the WRDI instruction.
The BP0 and BP1 (Block Protect) bits indicate which
blocks are currently protected. These bits are set by the
user issuing the WRSR instruction. The user is allowed
to protect quarter of the memory, half of the memory or
the entire memory by setting these bits. Once protected
the user may only read from the protected portion of the
array. These bits are non-volatile.
Status Register Bits
Array Address
Protection
BP1
BP0
Protected
0
0
None
No Protection
0
1
25C128: 3000-3FFF
Quarter Array Protection
25C256: 6000-7FFF
1
0
25C128: 2000-3FFF
Half Array Protection
25C256: 4000-7FFF
1
1
25C128: 0000-3FFF
Full Array Protection
25C256: 0000-7FFF
BLOCK PROTECTION BITS
76543210
WPEN
X
X
X
BP1
BP0
WEL
RDY
STATUS REGISTER




Html Pages

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


Datasheet Download



Número de Pieza relacionado

Número de PiezaDescripción de ComponentesHtml ViewFabricante
CAT15008Voltage Supervisor with 8-Kb and 16-Kb SPI Serial CMOS EEPROM 1 2 3 4 5 MoreCatalyst Semiconductor
CAT250201K/2K/4K SPI Serial CMOS EEPROM 1 2 3 4 5 MoreCatalyst Semiconductor
CAT25C01_051K/2K/4K SPI Serial CMOS EEPROM 1 2 3 4 5 MoreCatalyst Semiconductor
CAT250808-Kb and 16-Kb SPI Serial CMOS EEPROM 1 2 3 4 5 MoreCatalyst Semiconductor
CAT25C03_051K/2K/4K/8K/16K SPI Serial CMOS EEPROM 1 2 3 4 5 MoreCatalyst Semiconductor
CAT25C08_068K/16K SPI Serial CMOS EEPROM 1 2 3 4 5 MoreCatalyst Semiconductor
CAT25C32_0432K/64K-Bit SPI Serial CMOS EEPROM 1 2 3 4 5 MoreCatalyst Semiconductor
CAT25C33_0532K/64K-Bit SPI Serial CMOS EEPROM 1 2 3 4 5 MoreCatalyst Semiconductor
CAT15002Voltage Supervisor with 2-Kb and 4-Kb SPI Serial CMOS EEPROM 1 2 3 4 5 MoreCatalyst Semiconductor
CAT2532032-Kb SPI Serial CMOS EEPROM 1 2 3 4 5 MoreCatalyst Semiconductor

Enlace URL

¿ALLDATASHEET es útil para Ud.?  [ DONATE ]  

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Favorito   |   Intercambio de Enlaces   |   Lista de Fabricantes
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , 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