Service manual

3) Pin configuration
Pin
No.
Symbol
Signal
name
In/
Out
Function
1 XIN XIN In 25.175MHz
2 GND GND In GND
3 AEN GND In GND
4 /SBEH /SBEH In System byte high enable
5 /IOWR /IOWR In I/O write
6 /IORD /IORD In I/O read
7 /SMEMW /SMEMW In Memory write
8 /SMEMR /SMEMR In Memory read
9 A21 GND In GND
10 A20 GND In GND
11 SA19 VCC In +5V
12 SA18 GND In GND
13 SA17 VCC In +5V
14 SA16 A16 In Address bus
15 SA15 A15 In Address bus
16 SA14 A14 In Address bus
17 SA13 A13 In Address bus
18 SA12 A12 In Address bus
19 SA11 A11 In Address bus
20 SA10 A10 In Address bus
21 SA9 A9 In Address bus
22 SA8 A8 In Address bus
23 SA7 A7 In Address bus
24 SA6 A6 In Address bus
25 SA5 A5 In Address bus
26 SA4 A4 In Address bus
27 SA3 A3 In Address bus
28 SA2 A2 In Address bus
29 SA1 A1 In Address bus
30 SA0 A0 In Address bus
31 /BIOSEN NC In NC
32 /REFRESH /RFSH In Refresh signal
33 GND GND In GND
34 VDD VCC In +5V
35 SD15 D7 I/O Data bus
36 SD14 D6 I/O Data bus
37 SD13 D5 I/O Data bus
38 SD12 D4 I/O Data bus
39 GND GND In GND
40 SD11 D3 I/O Data bus
41 SD10 D2 I/O Data bus
42 SD9 D1 I/O Data bus
43 VDD VCC In +5V
44 SD8 D0 I/O Data bus
45 SD7 D15 I/O Data bus
46 SD6 D14 I/O Data bus
47 GND GND In GND
48 SD5 D13 I/O Data bus
49 SD4 D12 I/O Data bus
50 SD3 D11 I/O Data bus
51 SD2 D10 I/O Data bus
52 SD1 D9 I/O Data bus
53 SD0 D8 I/O Data bus
54 GND GND In GND
55 VDD VCC In +5V
56 IOCHRDY /VWAITI Out Channel ready signal
57 /MEMCS16 NC In NC
58 /IOCS16 NC In NC
59 GND GND In GND
Pin
No.
Symbol
Signal
name
In/
Out
Function
60 VDD VCC In +5V
61 DCLK XCK Out Data shift clock
62 DISP DISP Out Display enable
63 LP LP Out Line pulse
64 FP YD OUt Frame pulse
65 UD7 DU7 Out Upper data
66 UD6 DU6 Out Upper data
67 UD5 DU5 Out Upper data
68 UD4 DU4 Out Upper data
69 UD3 DU3 Out Upper data
70 UD2 DU2 Out Upper data
71 UD1 DU1 Out Upper data
72 UD0 DU0 Out Upper data
73 GND GND In GND
74 VDD VCC In +5V
75 LD7 DL7 Out Lower data
76 LD6 DL6 Out Lower data
77 LD5 DL5 Out Lower data
78 LD4 DL4 Out Lower data
79 LD3 DL3 Out Lower data
80 LD2 DL2 Out Lower data
81 LD1 DL1 Out Lower data
82 LD0 DL0 Out Lower data
83 BACKON BKLT Out Back light On
84 LCDON LCDON Out LCD drive power on signal
85 LOGICON NC Out LCD logic power on signal
86 GND GND In GND
87 VDD VCC In +5V
88 MA9 NC Out NC
89 MA8 MA8 Out Memory address bus
90 MA7 MA7 Out Memory address bus
91 MA6 MA6 Out Memory address bus
92 MA5 MA5 Out Memory address bus
93 MA4 MA4 Out Memory address bus
92 MA3 MA3 Out Memory address bus
91 MA2 MA2 Out Memory address bus
92 MA5 MA5 Out Memory address bus
93 MA4 MA4 Out Memory address bus
94 MA3 MA3 Out Memory address bus
95 MA2 MA2 Out Memory address bus
96 MA1 MA1 Out Memory address bus
97 MA0 MA0 Out Memory address bus
98 GND GND In GND
99 VDD VCC In VCC
100 /RAS /RASV Out RAS address strobe
101 /UCAS /UCASV Out Upper CAS address strobe
102 /LCAS /LCASV Out Lower CAS address strobe
103 /WE /WEV Out Write enable
104 MD15 MD15 I/O Memory data
105 MD14 MD14 I/O Memory data
106 MD13 MD13 I/O Memory data
107 MD12 MD12 I/O Memory data
108 MD11 MD11 I/O Memory data
109 MD10 MD10 I/O Memory data
110 GND GND In GND
111 VDD VCC In +5V
112 MD9 MD9 I/O Memory data
113 MD8 MD8 I/O Memory data
114 MD7 MD7 I/O Memory data