UNI
/
O® EEPROM
Using UNI
/
O EEPROM can free up MCU pins for new features.
Microchip’s new UNI
/
O Serial EEPROM uses only ONE connection to the
host microcontroller. This compares to two or three pins for I
2
C, and three
to six pins for Microwire or SPI buses. This new, proprietary bus offers
advanced features like a status register and write-protection on demand,
along with all I
/
O and memory array and command functions through a
single pin.
2.5-5.5V
11LC010
11LC020
11LC040
11LC080
11LC160
1.8-5.5V
11AA010
1 Kb
11AA020
2 Kb
11AA040
4 Kb
11AA080
8 Kb
11AA160
16 Kb
Single I
/
O EEPROM
One I
/
O for clock, data & control
■
■
■
■
■
■
■
Single I
/
O interface
1-16 Kbit memory densities
1.8-5.5V operating voltage
10-100 KHz operating frequency
Status register, SW write-protect
3-pin SOT-23, 8-pin SOIC, MSOP & TDFN
1M Erase/Write cycles
Save I
/
O Pins
A single I
/
O EEPROM can simplify your design and
reduce system cost
■
Free up pins on the MCU
–
Add new features to your application
–
Move to a smaller MCU – reduce cost
■
Free up pins on your connector
–
Smaller connector – lower cost
■
Single I
/
O interface – more compact design
The UNI/O Advantage
I
2
C™
V
CC
UNI/O
®
V
CC
R1
SDA
SCL
WP
MCU
R2
V
CC
Single I/O, No pull-up
resistors needed.
UNI/O
®
V
CC
SDA
SCL
WP
MCU
I
2
C™
V
CC
■ Save board space
■ Save pins on the MCU
■ Add additional features
■
UNI
/
O software drivers available for many popular microcontrollers See Ap Note section for more information.
■
Convert UNI
/
O from 3-pins to 2-pins – check out Ap Note AN1213.
www.microchip.com/unio
8
Serial Memory Products
MICROCHIP [ MICROCHIP TECHNOLOGY ]
