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X25320 Datasheet(PDF) 1 Page - Xicor Inc.

No. de Pieza. X25320
Descripción  SPI Serial E2PROM With Block LockTM Protection
Descarga  15 Pages
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Fabricante  XICOR [Xicor Inc.]
Página de inicio  http://www.xicor.com
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X25320 Datasheet(HTML) 1 Page - Xicor Inc.

 
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X25320
1
32K
X25320
4K x 8 Bit
©Xicor, Inc. 1994, 1995, 1996 Patents Pending
Characteristics subject to change without notice
3063-3.9 6/11/96 T4/C1/D0 NS
Direct Write™ and Block Lock™ Protection is a trademark of Xicor, Inc.
SPI Serial E2PROM With Block LockTM Protection
FEATURES
• 2MHz Clock Rate
• SPI Modes (0,0 & 1,1)
• 4K X 8 Bits
— 32 Byte Page Mode
• Low Power CMOS
—<1
µA Standby Current
— <5mA Active Current During Write
• 2.7V To 5.5V Power Supply
• Block Lock Protection
— Protect 1/4, 1/2 or all of E2PROM Array
• Built-in Inadvertent Write Protection
— Power-Up/Power-Down protection circuitry
— Write Enable Latch
— Write Protect Pin
• Self-Timed Write Cycle
— 5ms Write Cycle Time (Typical)
• High Reliability
— Endurance: 100,000 cycles
— Data Retention: 100 Years
— ESD protection: 2000V on all pins
• 8-Lead PDlP Package
• 8-Lead SOIC Package
• 14-Lead TSSOP Package
DESCRIPTION
The X25320 is a CMOS 32768-bit serial E2PROM,
internally organized as 4K x 8. The X25320 features a
Serial Peripheral Interface (SPI) and software protocol
allowing operation on a simple three-wire bus. The bus
signals are a clock input (SCK) plus separate data in (SI)
and data out (SO) lines. Access to the device is con-
trolled through a chip select (
CS) input, allowing any
number of devices to share the same bus.
The X25320 also features two additional inputs that
provide the end user with added flexibility. By asserting
the
HOLD input, the X25320 will ignore transitions on its
inputs, thus allowing the host to service higher priority
interrupts. The
WP input can be used as a hardwire input
to the X25320 disabling all write attempts to the status
register, thus providing a mechanism for limiting end
user capability of altering 0, 1/4, 1/2 or all of the memory.
The X25320 utilizes Xicor’s proprietary Direct Write™
cell, providing a minimum endurance of 100,000 cycles
and a minimum data retention of 100 years.
FUNCTIONAL DIAGRAM
COMMAND
DECODE
AND
CONTROL
LOGIC
WRITE
CONTROL
AND
TIMING
LOGIC
WRITE
PROTECT
LOGIC
X DECODE
LOGIC
4K BYTE
ARRAY
32 X 256
Y DECODE
DATA REGISTER
SO
SI
SCK
CS
HOLD
WP
32
64
8
32
STATUS
REGISTER
32
64 X 256
32 X 256
3063 ILL F01
APPLICATION NOTE
A V AILABLE
AN61


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