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X84160 Datasheet, PDF (1/22 Pages) IC MICROSYSTEMS – Advanced MPS™ Micro Port Saver EEPROM with Block Lock™ Protection
Preliminary Information
This X84160/640/128 device has been acquired by
IC MICROSYSTEMS from Xicor, Inc.
ICmicTM
IC MICROSYSTEMS
16K/64K/128K
X84160/640/128
MPSTM EEPROM
Advanced MPS™ Micro Port Saver EEPROM with Block Lock™ Protection
FEATURES
•Up to 15MHz data transfer rate
•20ns Read Access Time
•Direct Interface to Microprocessors and
Microcontrollers
—Eliminates I/O port requirements
—No interface glue logic required
—Eliminates need for parallel to serial converters
•Low Power CMOS
—1.8V–3.6V, 2.5V–5.5V and 5V ± 10% Versions
—Standby Current Less than 1µA
—Active Current Less than 1mA
•Byte or Page Write Capable
—32-Byte Page Write Mode
•New Programmable Block Lock™ Protection
—Software Write Protection
—Programmable Hardware Write Protection
•Block Lock (0, 1/4, 1/2, or all of the array)
•Typical Nonvolatile Write Cycle Time: 3ms
•High Reliability
—100,000 Endurance Cycles
—Guaranteed Data Retention: 100 Years
•Small Package Options
—8-Lead Mini-DIP Package
—8, 14-Lead SOIC Packages
—8, 20, 28-Lead TSSOP Packages
—8-Lead XBGA Packages
DESCRIPTION
The µPort Saver memories need no serial ports or special
hardware and connect to the processor memory bus.
Replacing bytewide data memory, the µPort Saver uses
bytewide memory control functions, takes a fraction of
the board space and consumes much less power.
Replacing serial memories, the µPort Saver provides all the
serial benefits, such as low cost, low power, low voltage,
and small package size while releasing I/Os for more
important uses.
The µPort Saver memory outputs data within 20ns of an
active read signal. This is less than the read access time
of most hosts and provides “no-wait-state” operation. This
prevents bottlenecks on the bus. With rates to
15MHz, the µPort Saver supplies data faster than
required by most host read cycle specifications. This
eliminates the need for software NOPs.
The µPort Saver memories communicate over one line of the
data bus using a sequence of standard bus read and
write operations. This “bit serial” interface allows the
µPort Saver to work well in 8-bit, 16 bit, 32-bit, and 64-bit
systems.
The X84160/640/128 provide additional data security
features through Block Lock and programmable Hardware
Write Protection. These allow some or all of the array to
be write protected by software command or by hardware.
System Configuration, Company ID, calibration information,
or other critical data can be secured against unexpected
or inadvertent program operations, leaving the remainder
of the memory available for the system or user access
A Write Protect (WP) pin prevents inadvertent writes to the
memory.
Xicor EEPROMs are designed and tested for
applications requiring extended endurance. Inherent data
retention is greater than 100 years.
BLOCK DIAGRAM
System Connection
Ports
Saved
µP
A15
µC
DSP
ASIC
A0
D7
RISC
D0
P0/CS
P1/CLK
OE
P2/DI
P3/DO
WE
Internal Block Diagram MPS
WP
H.V. GENERATION
TIMING & CONTROL
CE
I/O
COMMAND
DECODE
OE
AND
CONTROL
LOGIC
WE
X
DEC
EEPROM
ARRAY
16K x 8
8K x 8
2K x 8
Y DECODE
DATA REGISTER
©Xicor, Inc. 1998 Patents Pending
7067 1.1 6/10/98 T10/C0/D3
1
Characteristics subject to change without notice