General Description
●The HT1621 is a 128 pattern (324), memory mapping, and multi-function LCD driver. The S/W configuration
●feature of the HT1621 makes it suitable for multiple LCD applications including LCD modules and display sub
●systems. Only three or four lines are required for the in terface between the host controller and the HT1621.
●The HT1621 contains a power down command to reduce power consumption.
●Features
●Operating voltage: 2.4V~5.2V
●Built-in 256kHz RC oscillator
●External 32.768kHz crystal or 256kHz frequency source input
●Selection of 1/2or1/3 bias, and selection of 1/2 or 1/3 or 1/4 duty LCD applications
●Internal time base frequency sources
●Two selectable buzzer frequencies (2kHz/4kHz)
●Power down command reduces power consumption
●Built-in time base generator and WDT
●Time base or WDT overflow output
●8 kinds of time base/WDT clock sources
●324 LCD driver
●Built-in 324 bit display RAM
●3-wire serial interface
●Internal LCD driving frequency source
●Software configuration feature
●Data mode and command mode instructions
●R/W address auto increment
●Three data accessing modes
●VLCD pin for adjusting LCD operating voltage
●HT1621: 44-pin QFP/LQFP package
●HT1621B: 48-pin SSOP/LQFP packages
●HT1621G: Gold bumped chip
