Caprice Pro-Action Baseball Chip labeled PIC 1655A-043 GI 7934 TAIWAN 5 buttons: Hit, Reset, Curve Left, Straight, Curve Right 1 switch: Manual / Auto Piezo buzzer CD4028 BCD to decimal decoder LEDs: 36 LEDs 7-segment LED PIC1655A pinout 1 /RTCC - C2 2 VDD - Batt + via switch 3 VXX - VDD 4 VSS - Batt - 5 TEST - VSS 6 RA0 - Curve Left button 7 RA1 - Curve Right button 8 RA2 - Straight button 9 RA3 - N/C 10 RB0 - segment A + LED matrix 11 RB1 - segment B + LED matrix 12 RB2 - segment C + LED matrix 13 RB3 - segment D + LED matrix 14 RB4 - segment E 15 RB5 - segment F 16 RB6 - segment G 17 RB7 - segment DP 18 RC0 - BCD to decimal input A 19 RC1 - BCD to decimal input B 20 RC2 - BCD to decimal input C 21 RC3 - BCD to decimal input D 22 RC4 - Hit button 23 RC5 - Auto switch 24 RC6 - N/C 25 RC7 - piezo 26 CLK OUT - N/C measured average 277.3 kHz, 23.9% duty cycle 27 OSC - 18K resistor to VDD, 27pf cap to VSS 28 /MCLR - cap and Reset button LED layout 1 2 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 30 31 24 25 26 32 33 34 27 28 29 35 36 LED matrix BCD output B0 B1 B2 B3 0 17 19 21 23 1 24 25 26 27 2 28 29 13 11 3 10 12 7 4 4 9 2 3 5 5 6 1 20 18 6 16 8 14 22 7 15 30 31 32 8 33 34 35 36 9 - 7-segment LED