X84641 Datasheet: uPort Saver EEPROM





X84641 uPort Saver EEPROM Datasheet

Part Number X84641
Description uPort Saver EEPROM
Manufacture Xicor
Total Page 17 Pages
PDF Download Download X84641 Datasheet PDF

Features: APPLICATION NOTE A V A I L A B L E AN95 • AN103 • AN107 16K/64K/128K X84 161/641/129 µ Port Saver EEPROM DESCRI PTION MPS™ EEPROM FEATURES • Up t o 10MHz data transfer rate • 25ns Rea d Access Time • Direct Interface to M icroprocessors and Microcontrollers — Eliminates I/O port requirements —No interface glue logic required —Elimin ates need for parallel to serial conver ters • Low Power CMOS —1.8V–3.6V, 2.5V–5.5V and 5V ±10% Versions —S tandby Current Less than 1µA —Active Current Less than 1mA • Byte or Page Write Capable —32-Byte Page Write Mo de • Typical Nonvolatile Write Cycle Time: 2ms • High Reliability —100,0 00 Endurance Cycles —Guaranteed Data Retention: 100 Years The µPort Saver memories need no serial ports or specia l hardware and connect to the processor memory bus. Replacing bytewide data me mory, the µPort Saver uses bytewide me mory control functions, takes a fractio n of the board space and consumes much less power. Replacing serial memories, the µPort Saver provides all the.

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APPLICATION NOTE
AVAILABLE
AN95 • AN103 • AN107
16K/64K
X84161/641
µPort Saver EEPROM
MPSEEPROM
FEATURES
• Up to 10MHz data transfer rate
• 25ns Read Access Time
• Direct interface to microprocessors and micro-
controllers
—Eliminates I/O port requirements
—No interface glue logic required
—Eliminates need for parallel to serial converters
• Low power CMOS
—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
• Typical nonvolatile write cycle time: 2ms
• High reliability
—100,000 endurance cycles
—Guaranteed data retention: 100 years
• Small packages options
—8-lead mini-DIP package
—8-lead SOIC package
—8, 20-lead TSSOP package
BLOCK DIAGRAM
Ports
Saved
System Connection
µP
µC
DSP
ASIC
RISC
P0/CS
P1/CLK
P2/DI
P3/DO
A15
A0
D7
D0
OE
WE
DESCRIPTION
The µPort Saver memories need no serial ports or
special hardware and connect to the processor mem-
ory 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 25ns of
an active read signal. This is less than the read access
time of most hosts and provides “no-wait-state” opera-
tion. This prevents bottlenecks on the bus. With rates
to 10MHz, 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.
A Write Protect (WP) pin prevents inadvertent writes to
the memory.
Xicor EEPROMs are designed and tested for applica-
tions requiring extended endurance. Inherent data
retention is greater than 100 years.
Internal Block Diagram
MPS
WP H.V. Generation
Timing & Control
CE
Command
I/O Decode
OE
and
Control
Logic
WE
X
DEC
EEPROM
Array
8K x 8
2K x 8
Y Decode
Data Register
REV 1.0 6/30/00
www.xicor.com
Characteristics subject to change without notice. 1 of 17

                    
                    






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