View hd647180x datasheet:

HD647180X (1/5) IL00D C-MOS 8-BIT MICRO PROCESSING UNIT —TOP VIEW— 65 40 66 39 67 GND 38 68 37 69 36 70 35 GND 71 34 72 33 73 32 74 31 75 30 76 VDD 29 GND 77 28 VDD 78 27 79 26 80 25 64 63 62 61 60 59 58 57 56 55 54 53 21 51 50 49 48 47 46 45 44 43 42 41 1 2 3 4 5 6 7 8 9 10 GND 11 12 13 14 15 16 17 18 19 20 21 22 23 24 HD647180X (2/5) MODE 0 : HD643180X, HD647180X MODE 1 : HD641180XF6, HD643180X, HD647180X, HD641180X-8L-FP80B MODE 2 : HD643180X, HD647180X PROM MODE : HD647180X MODE 0 MODE 1 MODE 2 PROM MODE PIN No. I/O SIGNAL I/O SIGNAL I/O SIGNAL I/O SIGNAL 1 I I I O A9 NMI NMI NMI 2 I I I — NC INT0 INT0 INT0 3 I I I — NC INT1 INT1 INT1 4 I I I — NC INT2 INT2 INT2 5 I/O PE4