HH1621

Edited by Foxit PDF Editor Copyright (c) by Foxit Software Company, 2004 For Evaluation Only. HH1621 32 x 4 LCD Driver Features _ Operating voltage: 2.2V~5.2V _ Built-in 256kHz RC oscillator _ External 32.768kHz crystal or 256kHz frequency source input _ Selection of 1/2, 1/3 bias, and selection of 1/2, 1/3, 1/4 duty LCD applications _ Internal time base frequency sources _ Two selectable buzzer frequencies (2/4kHz) _ Built-in time base generator and WDT _ Time base or WDT overflow output _ Power down command available _ 8 kinds of time base/WDT clock sources _ Built-in 32x4 bit display RAM _ 3-wire serial interface. _ Internal LCD driving frequency source _ Software configuration _ Data mode and command mode instructions _ R/W address auto increment _ Three data accessing modes _ VLCD pin for adjusting LCD operating voltage General Descriptions The HH1621 is a 128-pattern (32x4), memory mapping, and multi-function LCD driver. The S/W configuration feature of the HH1621 makes it sui...