name: HT48C10_18PIN function: 8-Bit Microcontroller package: DIP18,18 manufacturer: Holtek +--()--+ PA3 | 1 18| PA4 PA2 | 2 17| PA5 PA1 | 3 16| PA6 PA0 | 4 15| PA7 PB0 | 5 14| OSC2 VSS | 6 13| OSC1 INTB | 7 12| VDD TMR | 8 11| RESB PC0 | 9 10| PC1 +------+ This pinout came from the Chipdir: http://www.chipdir.org/ name: HT48C10_20PIN function: 8-Bit Microcontroller package: DIP/SOP20,20 manufacturer: Holtek +--()--+ PA3 | 1 20| PA4 PA2 | 2 19| PA5 PA1 | 3 18| PA6 PA0 | 4 17| PA7 PB3 | 5 16| OSC2 PB2 | 6 15| OSC1 PB1 | 7 14| VDD PB0 | 8 13| RESB VSS | 9 12| PC1 INTB(TMR) |10 11| PC0 +------+ This pinout came from the Chipdir: http://www.chipdir.org/ name: HT48C10_24PIN function: 8-Bit Microcontroller package: SKDIP24,24 manufacturer: Holtek +--()--+ PB5 | 1 24| PB6 PB4 | 2 23| PB7 PA3 | 3 22| PA4 PA2 | 4 21| PA5 PA1 | 5 20| PA6 PA0 | 6 19| PA7 PB3 | 7 18| OSC2 PB2 | 8 17| OSC1 PB1 | 9 16| VDD PB0 |10 15| RESB VSS |11 14| PC1 INTB(TMR) |12 13| PC0 +------+ This pinout came from the Chipdir: http://www.chipdir.org/