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CAT25C08U14-TE13 Datasheet(Hoja de datos) 5 Page - Catalyst Semiconductor

No. de Pieza. CAT25C08U14-TE13
Descripción  1K/2K/4K/8K/16K SPI Serial CMOS E2PROM
Descarga  10 Pages
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Fabricante  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
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5
CAT25C01/02/04/08/16
Doc. No. 25067-00 5/00
Advanced Information
Status Register Bits
Array Address
Protection
BP1
BP0
Protected
0
0
None
No Protection
0
1
25C01: 60-7F
Quarter Array Protection
25C02: C0-FF
25C04: 180-1FF
25C08: 0300-03FF
25C16: 0600-07FF
1
0
25C01: 40-7F
Half Array Protection
25C02: 80-FF
25C04: 100-1FF
25C08: 0200-03FF
25C16: 0400-07FF
1
1
25C01: 00-7F
Full Array Protection
25C02: 00-FF
25C04: 000-1FF
25C08: 0000-03FF
25C16: 0000-07FF
BLOCK PROTECTION BITS
76543210
WPEN
PR_MODE
SPI_MODE
X
BP1
BP0
WEL
RDY
STATUS REGISTER
HOLD
HOLD
HOLD
HOLD
HOLD: Hold
HOLD is the HOLD pin. The HOLD pin is used to pause
transmission to the CAT25C01/02/04/08/16 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 CAT25C01/
02/04/08/16 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 onlyThe 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.
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




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