name: HT1621D function: RAM Mapping 32x4 LCD Controller for I/O uC package: Skinny28,28 manufacturer: Holtek +--()--+ SEG5 | 1 28| SEG7 SEG3 | 2 27| SEG9 SEG1 | 3 26| SEG11 CSB | 4 25| SEG13 RDB | 5 24| SEG15 WRB | 6 23| SEG17 DATA | 7 22| SEG19 VSS | 8 21| SEG21 VLCD | 9 20| SEG23 VDD |10 19| SEG25 IRQB |11 18| SEG27 BZ |12 17| SEG29 COM0 |13 16| SEG31 COM1 |14 15| COM2 +------+ This pinout came from the Chipdir: http://www.chipdir.org/