Mario Bros
MW56

60 QFP Chip labeled 
MW-56
533C
Nintendo

9 buttons
LCD segments
piezo


Sharp SM510

1  T        VDD
2  K1       
3  K2       
4  K3       Luigi Up button
5  K4       Luigi Down button / Alarm button
6  ACL      ACL button
7  BA       N/C
8  Gnd      batt+
9  Osc Out  crystal
10 Osc In   crystal
11 VDD      batt -
12 beta     N/C
13 R1       piezo
14 R2       N/C
15 bs
16 b16
17 a16
18 b15
19 a15
20 b14
21 a14
22 b13
23 a13
24 b12
25 a12
26 b11
27 a11
28 b10
29 a10
30 b9
31 a9
32 b8
33 a8
34 b7
35 a7
36 b6
37 a6
38 N/C
39 b5
40 a5
41 b4
42 a4
43 b3
44 a3
45 b2
46 a2
47 b1
48 a1
49 H4
50 H3
51 H2
52 H1
53 S1       Luigi Up / Luigi Down
54 S2       Alarm
55 S3       N/C
56 S4       N/C
57 S5       N/C
58 S6       N/C
59 S7       N/C
60 S8       N/C


Buttons

      K1       K2       K3         K4
S1    ??       ??    Luigi Up  Luigi Down
S2    ??       ??       ??        Alarm