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HT1621 Datasheet(PDF) 1 Page - Holtek Semiconductor Inc |
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HT1621 Datasheet(HTML) 1 Page - Holtek Semiconductor Inc |
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1 / 21 page  HT1621 RAM Mapping 32´4 LCD Controller for I/O MCU PATENTED PAT No. : 099352 Selection Table HT162X HT1620 HT1621 HT1622 HT16220 HT1623 HT1625 HT1626 COM 4 4 888 8 16 SEG 32 32 32 32 48 64 48 Built-in Osc. ¾ Ö Ö¾Ö Ö Ö Crystal Osc. ÖÖ ¾ Ö Ö Ö Ö Rev. 2.60 1 October 28, 2009 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 1/2or 1/3or1/4 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 · 32´4 LCD driver · Built-in 32´4 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 package HT1621B: 48-pin SSOP/LQFP packages HT1621D: 28-pin SKDIP package HT1621G: Gold bumped chip General Description The HT1621 is a 128 pattern (32 ´4), 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 re- duce power consumption. Technical Document · Application Note |
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