Casio QT-2000 Service Manual page 25

Pin No. Name
51 EAD1 Address / Data bus (AD1)
52 EAD2 Address / Data bus (AD2)
53 EAD3 Address / Data bus (AD3)
54 EAD4 Address / Data bus (AD4)
55 EAD5 Address / Data bus (AD5)
56 SVSS GND
57 EAD6 Address / Data bus (AD6)
58 EAD7 Address / Data bus (AD7)
59 EA8 Address bus (A8)
60 EA9 Address bus (A9)
61 EA10 Address bus (A10)
62 EA11 Address bus (A11)
63 EA12 Address bus (A12)
64 EA13 Address bus (A13)
65 EA14 Address bus (A14)
66 EA15 Address bus (A15)
67 ECPURS Reset signal
68 EREADY Ready signal
69 EA16 Address bus (A16)
70 EA17 Address bus (A17)
71 EA18 Address bus (A18)
72 EA19 Address bus (A19)
73 _EINTA Interrupt acknowledge signal from CPU
74 EASTB Address strobe signal
75 EINT Interrupt signal to CPU
76 EINMCK IO / Memory select signal
77 VSS GND
78 _EINSD Not used
79 VDD VCC
80 _EINRD VCC
81 ESDEND Not used
82 _EKPSD Send data to kitchen printer
83 _EKPRD Receive data from kitchen printer
84 EKPEND RTS signal for kitchen printer
85 ESD Send data for COM1
86 ERD Receive data for COM1
87 _ECI VCC
88 _EDR DSR signal for COM1
89 _EER DTR signal for COM1
90 _ECD VCC
91 _ECS CTS signal for COM1
92 _ERS RTS signal for COM1
93 E16MX1 Main system clock 16MHz
94 E16MX2 Main system clock 16MHz
95 SVSS GND
96 ECPURC CLock signal from CPU
97 ECPUCK CLock signal from CPU
98 _FBFEN Buffer enable signal
99 TEST2 GND
100 EIONM IO / Memory selection signal from CPU
Description
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I n / O u t
In/Out
In/Out
In/Out
In/Out
In/Out
-
In/Out
In/Out
In
In
In
In
In
In
In
In
Out
Out
In
In
In
In
In
In
Out
Out
-
Out
In
In
Out
Out
In
Out
Out
In
In
In
Out
In
In
Out
In
Out
-
In
Out
In
In
In