Casio QT-2100 - Page 20

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5-4-2. Pin description
PIN NO PIN NAME I /O DESCRIPTION
1 MD1 IN VCC (3.3V)
2 MD2 IN GND
3 Vcc-RTC - Vrtc (1.90V)
4 XTAL2 OUT CLOCK (32.768KHz)
5 EXTAL2 IN CLOCK (32.768KHz)
6 Vss-RTC - RTC (GND)
7 NMI IN Not used
8 IRQ0/IRL0/PTH[0] IN/IN/I/O Power cut
9 IRQ1/IRL1/PTH[1] IN/IN/I/O UART INT
10 IRQ2/IRL2/PTH[2] IN/IN/I/O PCMCIA INT
11 IRQ3/IRL3/PTH[3] IN/IN/I/O IOC CPU CTS
12 IRQ4/PTH[4] IN/I/O ARCENT/Ether Net INT
13 D31/PTB[7] I/O Data bus (D31)
14 D30/PTB[6] I/O Data bus (D30)
15 D29/PTB[5] I/O Data bus (D29)
16 D28/PTB[4] I/O Data bus (D28)
17 D27/PTB[3] I/O Data bus (D27)
18 D26/PTB[2] - Data bus (D26)
19 VssQ I/O I/O Power supply (0V)
20 D25/PTA[1] - Data bus (D25)
21 VccQ I/O I/O Power supply (3.3V)
22 D24/PTA[0] I/O Data bus (D24)
23 D23/PTA[7] I/O Data bus (D23)
24 D22/PTA[6] I/O Data bus (D22)
25 D21/PTA[5] I/O Data bus (D21)
26 D20/PTA[4] I/O Data bus (D20)
27 Vss - GND
28 D19/PTA[3] I/O Data bus (D19)
29 Vcc - VCC
30 D18/PTA[2] I/O Data bus (D16)
31 D17/PTA[1] I/O Data bus (D17)
32 D16/PTA[0] I/O Data bus (D18)
33 VssQ I/O GND
34 D15 I/O Data bus (D15)
35 VccQ I/O I/O Power supply (3.3V)
36 D14 I/O Data bus (D14)
37 D13 I/O Data bus (D13)
38 D12 I/O Data bus (D12)
39 D11 I/O Data bus (D11)
40 D10 I/O Data bus (D10)
41 D9 I/O Data bus (D9)
42 D8 I/O Data bus (D8)
43 D7 I/O Data bus (D7)
44 D6 I/O Data bus (D6)
45 VssQ - I/O Power supply (0V)
46 D5 I/O Data bus (D5)
47 VccQ I/O I/O Power supply (3.3V)
48 D4 I/O Data bus (D4)
49 D3 I/O Data bus (D3)
50 D2 I/O Data bus (D2)
51 D1 I/O Data bus (D1)
52 D0 I/O Data bus (D0)
53 A0 OUT Address bus (A0)
54 A1 OUT Address bus (A1)
55 A2 OUT Address bus (A2)
56 A3 OUT Address bus (A3)
57 VssQ - I/O Power supply (0V)
58 A4 OUT Address bus (A4)
59 VccQ - I/O Power supply (3.3V)
60 A5 OUT Address bus (A5)
61 A6 OUT Address bus (A6)
62 A7 OUT Address bus (A7)
63 A8 OUT Address bus (A8)
64 A9 OUT Address bus (A9)
65 A10 OUT Address bus (A10)
66 A11 OUT Address bus (A11)
67 A12 OUT Address bus (A12)