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IC DESCRIPTION (DX-NDVH2450)
IC, UPD78044HGF
Pin No.
Pin Name
1~7
G7~G1
8
VDD
9
O-DISH R
10
O-DISH F
11
NC
12
I/O BUSY
13
O-CLK
14
NC
15
O-DATA
16
I-DATA
17
RESET
18
O-OPEN
19
O-CLOSE
20
A VSS
21
NC
22
I-SW
23
I-DISH S
24
B-SKIP
25
I-KEY1
26
I-KEY2
27,28
NC
29
A VDD
30
A VREF
31
XT1
32
XT2
33
VSS
34
X1
35
X2
36
O-SHIFT
37
CD ON
38
LED 2
39
LED 1
40
NC
41
O-MUTE
42
NC
43
I/O-SERIAL
44~46
NC
47,48
IC
49
LED4
50
LED5
I/O
O
FL grid output G7~G1.
–
Power supply terminal.
O
CD turntable reverse rotation output.
O
CD turntable forward rotation output.
–
Connected to pull-down resistor
I/O
DSP serial latch output.
O
CD clock output.
–
Not connected.
O
CD data output.
I
CD data input.
I
Reset input.
O
CD tray open output.
O
CD tray close output.
–
GND.
–
Not connected.
I
CD motor key switch A/D input.
I
CD turntable photo sensor A/D input.
I
BLANK SKIP A/D input.
I
Key1 A/D input.
I
Key2 A/D input.
–
Connected to pull-up resistor.
–
Power supply terminal.
–
Power supply terminal.
–
Connect to GND.
–
Not used.
–
GND.
–
4.19MHz oscillator circuit.
O
Micro controller clock shift output (Shift when "L").
O
Power supply output for CD circuit ("H": ON).
O
Play LED output.
O
Pause LED output.
–
Not connected.
O
CD Audio mute output.
–
Connected to pull-down resistor.
I/O
Serial data input / output.
–
Connected to pull-down resistor.
–
Connect to GND.
O
Disc1 LED output.
O
Disc2 LED output.
Description
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