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IC DESCRIPTION
IC, µPD789026GB
Pin No.
Pin Name
1
O-SW1
2
O-SW2
3
O-XRST
4
O-CLK
5
O-XTL
6
O-DATA
7
O-SQCK
8
I-SQ-DATA
9
I-SENS
_____________________
10
I-SHATTER
____________________
11
I-TGDOWN
12
NC
13
IC
14
X2
15
X1
16
VSS
17
VDD
______________
18
RESET
19
P53
20
P52
21
P51
__________________
22
I-1992BR
________
23
I-FB
________
24
I-TG
_________
25
I-TB
26
I-COMMAND
27
O-STATUS
28
I-SCLK
29
X-BUSY
30
P06
______________
31
100MS
32
O-AMUTE
33
O-PLAY
34
O-PAUSE
35
O-SERCH
36
O-STOP
37
NC
38
VDD
39
VSS
40
P17
I/O
O
Not used.
O
XRST input to DSP. Low output during 100 m seconds after about 100 m seconds of
O
resetting the system.
O
Clock input to DSP.
O
Latch input to DSP.
O
Data input to DSP.
O
SUB-Q data read-out clock to DSP.
I
SUB-Q input from DSP.
I
SENS input from DSP.
I
Connected to GND.
I
—
Not used.
—
Connected to GND.
O
Output terminal for external ceramic oscillator.
I
Input terminal for external ceramic oscillator.
—
GND of microprocessor.
—
Power supply of microprocessor.
I
Microprocessor reset input.
—
—
—
I
Not used.
I
I
I
I
Command input from main microprocessor.
O
Data output to main microprocessor.
I
O-status read-out clock from main microprocessor/Clock for I-command.
I/O
Flag for confirmation of busy and ready with the main microprocessor.
—
Not used.
—
Connected to GND.
O
Low output during playback only.
O
High output during playback only
O
High output during pause only.
O
High output during search only.
O
High output during stop only.
—
Not used.
—
Power supply of microprocessor.
—
GND of microprocessor.
—
Not used.
36
Description
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