name: HT827A0 function: 8-Bit Microcontroller with Voice ROM package: DIP48,48 manufacturer: Holtek +--()--+ PA3 | 1 48| PB4 PA2 | 2 47| PB5 PA1 | 3 46| PB6 NC | 4 45| PB7 PA0 | 5 44| PA4 PB3 | 6 43| PA5 PB2 | 7 42| PA6 PB1 | 8 41| PA7 PB0 | 9 40| NC VSS |10 39| NC PE0 |11 38| NC PE1 |12 37| OSC2 PE2 |13 36| OSC1 PE3 |14 35| VDD INTB |15 34| RESB TMR |16 33| AUD PD0 |17 32| PC7 PD1 |18 31| PC6 PD2 |19 30| PC5 PD3 |20 29| PC4 PD4 |21 28| PC3 PD5 |22 27| PC2 PD6 |23 26| PC1 PD7 |24 25| PC0 +------+ This pinout came from the Chipdir: http://www.chipdir.org/