General Description
The HT1632 is a memory mapping LED display controller/driver, which can select a number of out bits and commons. These are 32 out bits & 8 commons and 24 out bits & 16 commons. The device supports 16-gradation LEDs for each out line using PWM control with software instructions. A serial interface is conveniently provided for the command mode and data mode. Only three or four lines are required for the interface between the host controller and the HT1632. The display can be extended by cascading the HT1632 for wider applications.

Features
• Operating voltage: 2.4V~5.5V
• Multiple LED display - 32 out bits/8 commons and 24 out bits/16 commons
• Integrated display RAM - select 32 out bits & 8 commons for 64x4 display RAM, or select 24 outbits & 16 commons for 96x4 display RAM
• 16-level PWM brightness control
• Integrated 256kHz RC oscillator
• Serial MCU interface - CS, RD, WR, DATA
• Data mode & command mode instruction
• Cascading function for extended applications (up to 5 HT1632s possible)
• Selectable NMOS open drain output driver and PMOS open drain output driver for commons
• 52-pin QFP package

Applications
• Industrial control indicator
• Digital clock, thermometer, counter, voltmeter
• Instrumentation readouts
• Other consumer application
• LED Displays