Casio QT-2000 Service Manual page 29

4. GA3 (MN53020KSG)
Pin No. Name
1 VSS
2 XO
3 SVDD
4 _CLOCK
5 _ENABLE
6 WMF1
7 WMF2
8 WMF3
9 WMF4
10 WMF5
11 WMF6
12 WMF7
13 WMF8
14 WMF9
15 _CLD2
16 _RCL2
17 _RDT2
18 _CLD1
19 _RCL1
20 _RDT1
21 _RESET
22 ASTB
23 _BUFEN
24 BUFNRW
25 _WR
26 VSS
27 INT
28 AD0
29 AD1
30 AD2
31 AD3
32 SVSS
33 AD4
34 AD5
35 AD6
36 AD7
37 VSS
38 AB8
39 VDD
40 AB9
41 AB10
42 AB11
43 AB12
44 AB13
45 AB14
46 AB15
47 _RD
48 ICEASTB
49 IOM
50 NC
Description
GND
Clock signal
VCC
Not used
Not used
GND
GND
GND
GND
GND
GND
GND
GND
GND
Card loading signal
Data sampling clock
Data signal
Card loading signal
Data sampling clock
Data signal
Reset signal
Address strobe signal
Buffer enable signal
Buffer read/write signal
Write signal
GND
Initilize signal
Address / Data bus (AD0)
Address / Data bus (AD1)
Address / Data bus (AD2)
Address / Data bus (AD3)
GND
Address / Data bus (AD4)
Address / Data bus (AD5)
Address / Data bus (AD6)
Address / Data bus (AD7)
GND
Address signal (A8)
VCC
Adress signal (A9)
Adress signal (A10)
Adress signal (A11)
Adress signal (A12)
Adress signal (A13)
Adress signal (A14)
Adress signal (A15)
Read signal
GND
IO/Memory select signal
Not used
— 27 —
I n / O u t
-
Out
In
Out
Out
In
In
In
In
In
In
In
In
In
In
In
In
In
In
In
In
In
In
In
In
-
Out
In/Out
In/Out
In/Out
In/Out
-
In/Out
In/Out
In/Out
In/Out
-
In
In
In
In
In
In
In
In
In
In
In
In
-