Yamaha Portatone PSR-VN300 Service Manual page 14

PSR-VN300
• NT3881DF-01 ( X3148A00 ) LCD DRIVER
• ML9040A-B01GAZ03A ( XZ987A00 ) LCD DRIVER
PIN
NAME I/O
NO.
1 S22 O
2 S21 O
3 S20 O
4 S19 O
5 S18 O
6 S17 O
7 S16 O
8 S15 O
9 S14 O
10 S13 O
11 S12 O
12 S11 O
13 S10 O
14 S9 O
15 S8 O
16 S7 O
17 S6 O
18 S5 O
19 S4 O
20 S3 O
21 S2 O
22 S1 O
23 Vss
24 OSC1 I
25 OSC2 O
26 V1
27 V2
28 V3
29 V4
30 V5
31 CLK1 O
32 CLK2 O
33 Vdd
34 M O
35 D O
36 RS I
37 R/W I
38 E I
39 DB0 I/O
40 DB1 I/O
14
FUNCTION
Segment signal output for LCD
driving
Ground
Oscillator
Oscillator
Power supply
Data latch clock
Data shift clock
Power supply (+5 V)
Altamated signal for LCD driver outout
Display data interface
Read/write
Enable
Data interface
Data interface
PIN
NAME I/O
NO.
41 DB2 I/O
42 DB3 I/O
43 DB4 I/O
Data interface
44 DB5 I/O
45 DB6 I/O
46 DB7 I/O
47 C1 O
48 C2 O
49 C3 O
50 C4 O
51 C5 O
52 C6 O
53 C7 O
54 C8 O Common signal output for LCD
55 C9 O driving
56 C10 O
57 C11 O
58 C12 O
59 C13 O
60 C14 O
61 C15 O
62 C16 O
63 S40 O
64 S39 O
65 S38 O
66 S37 O
67 S36 O
68 S35 O
69 S34 O
70 S33 O
71 S32 O Segment signal output for LCD
72 S31 O driving
73 S30 O
74 S29 O
75 S28 O
76 S27 O
77 S26 O
78 S25 O
79 S24 O
80 S23 O
DMLCD: IC701
FUNCTION