ht1621v300 详细 说明 PDF L T QFP44脚封装ht1621v300 详细 说明 PDF L T QFP44脚封装.pdf

HT1621/HT1621G RAM Mapping 324 LCD Controller for I/O MCU PATENTED PAT No. : TW 099352 Features Operating voltage: 2.4V~5.2V 324 LCD driver Built-in 256kHz RC oscillator Built-in 324 bit display RAM External 32.768kHz crystal or 256kHz frequency 3-wire serial interface source input Internal LCD driving frequency source Selection of 1 2 or 1 3 bias, and selection of 1 2 or / / / Software configuration feature 1 3 or 1 4 duty LCD applications / / Data mode and command mode instructions Internal time base frequency sources R/W address auto increment Two selectable buzzer frequencies (2kHz/4kHz) Three data accessing modes Power down command reduces power consumption VLCD pin for adjusting LCD operating voltage Built-in time base generator and WDT HT1621: 44-pin QFP/LQFP package Time base or WDT overflow output HT1621B: 48-pin SSOP/LQFP packages 8 kinds of time base/WDT clock sources HT1621G: Gold bumped chip General Description The HT1621 is a 128 pattern (324), memory mapping, systems. Only three or four lines are required for the in- and multi-function LCD driver. The S/W configuration terface between the host controller and the HT1621. feature of the HT