Casio QT-2000 Service Manual page 30

Pin No. Name
51 VSS GND
52 USD0 Data bus for USART (USD0)
53 USD1 Data bus for USART (USD1)
54 USD2 Data bus for USART (USD2)
55 USD3 Data bus for USART (USD3)
56 USD4 Data bus for USART (USD4)
57 USD5 Data bus for USART (USD5)
58 SVSS GND
59 USD6 Data bus for USART (USD6)
60 USD7 Data bus for USART (USD7)
61 TOUT Not used
62 CLK Clock signal for USART
63 ADB0 Not used
64 _RXC1 Not used
65 TXRDY1 Ready signal for IrDA or Com3
66 RXRDY1 GND
67 _USART1 CH1 select signal for USART
68 _TXC1 Send clock signal for CH1
69 _RXC2 Not used
70 TXRDY2 Ready signal for Com2
71 RXRDY2 GND
72 _USART2 CH2 select signal for USART
73 _TXC2 Not used
74 _ST2 VCC
75 _RT VCC
76 VSS GND
77 _CD VCC
78 _CI VCC
79 T3 GND
80 SELECT GND
81 PEND GND
82 _FAULT VCC
83 BUSY GND
84 NACK VCC
85 CENTD7 Not used
86 CENTD8 Not used
87 VDD VCC
88 CENTD6 Not used
89 VSS GND
90 CENTD4 Not used
91 CENTD5 Not used
92 CENTD3 Not used
93 CENTD2 Not used
94 CENTD1 Not used
95 _STROBE Not used
96 _INT Not used
97 T2 GND
98 T1 GND
99 XIN Clock signal
100 NC Not used
Description
— 28 —
I n / O u t
-
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
-
In/Out
In/Out
Out
Out
Out
Out
In
In
Out
Out
Out
In
In
Out
Out
In
In
-
In
In
In
In
In
In
In
In
Out
Out
In
Out
-
Out
Out
Out
Out
Out
Out
Out
In
In
In
-