描述 Description

The USAR SerialCoderTM UR5HC703 is an extremely low-power, “off-the-shelf” serial keyboard encoder. Robust, tiny and flexible, the IC is a good match for any application where the use of complicated keyboard protocols are not required and where asynchronous serial interface hardware is available.

特性 Features

? 8 x 16 Matrix Encoding

? 9600 Baud 8N1Serial Data Format

? IC is independent of the keyboard layout

? Zero-PowerTM operation, transparent to the Host

? Average current consumption of less than 1μA at room temperature; 10μA at 85°C

? Customized versions available

? TTL/CMOS Output-only Asynchronous Serial Interface to the Host (direct connection to the UART)

? Very simple serial protocol — Two-Byte Identification String on power-up; single-Byte Matrixposition for each key-press or key-release

? Robust algorithm for Ghost-key elimination

Applications

? Built-in keyboards for HH PDAs/Organizers

? Add-on accessory keyboards for Palm and H/PC Devices

? Portable Personal Computers

? Instrumentation

? Remote Control

? Cellular Phones