HT1130 Datasheet PDF

Holtek Semiconductor HT1130

The HT1130 is a processor from Holtek s 4-bit stand alone single chip microcontroller range specifically designed for LCD product applications. The device is ideally suited for multiple · Internal timer overflow interrupt · External interrupt · One level subroutine nesting · 8-bit timer with internal or external clock source · 8-bit table read instruction · Up to 4ms instruction cycle with 1MHz sys- tem clock at VDD=3V · All instructions in 1 or 2 machine cycles LCD low power applications among which are calculators, scales and hand-held LCD products. Pad Name I/O Mask Option Function 1, 2 BZ, BZ 3 VLCD 4 T256 22 T1D 9 TEST1 10 TEST2 O Note 1 Sound effect outputs I ¾ (+) LCD bias power supply O For test mode only O I ¾ TEST1 and TEST2 are left open when the HT1130 is in normal operation (with an internal pull high I resistor).