Onkyo DX-C34 Service Manual page 31

IC BLOCK DIAGRAM/ TERMINAL DESCRIPTION
Q501 : LC78683E MP3 DECODER FOR CD
Pin Functions
Pin No. Pin Name
1 LRSY
2 ADDATA
3 ADBCK
4 ADLRCK
5 C2FIN
6 TEST1
7 CKIN
8 VSS
9 CKOUT
10 TEST2
11 DV 1
DD
12 PW
13 SBSY
14 SFSY
15 SBCK
16 AV
DD
17 VPRFR
18 VCOC
19 VPDO
20 AVSS
21 DV 2
DD
22 VSS
23 MDATA0
24 MDATA1
25 MDATA2
26 MDATA3
27 MDATA4
28 MDATA5
29 MDATA6
30 MDATA7
31 DV 3
DD
32 VSS
33 MDATA8
34 MDATA9
35 MDATA10
36 MDATA11
37 MDATA12
38 MDATA13
39 MDATA14
40 MDATA15
41 RASB
42 WEB
43 CASLB
44 CASUB
45 OEB
46 MADRS12
47 MADRS11
48 MADRS10
49 MADRS9
50 MADRS8
I/O Block
I CD IF
O
O Audio interface
O
I CD IF
I Test
I CLOCK
Power supply
O CLOCK
I Test
Power supply
I
I
Subcode interface
I
O
Power supply
I PLL
O
Analog system ground
Power supply
I/O
I/O
I/O
I/O
Memory interface
I/O
I/O
I/O
I/O
Power supply
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
Memory interface
O
O
O
O
O
O
O
O
O
CD left/right clock input
Audio data output
Audio bit clock output
Audio left/right clock output
CD C2 error flag input
Test input 1 (This pin must be connected to ground during normal operation.)
System clock input (16.9344 MHz)
Ground
External digital filter and D/A converter clock (384 fs) output
Test input 2 (This pin must be connected to ground during normal operation.)
Digital I/O system power supply
CD subcode data serial input
CD subcode block sync signal input
CD subcode frame sync signal input
CD subcode transfer serial clock output
Analog system (PLL) power supply
VCO oscillator range setting
VCO control voltage input
VCO charge pump output
Analog system ground
Internal logic system power supply
GND
DRAM data bus 0
DRAM data bus 1
DRAM data bus 2
DRAM data bus 3
DRAM data bus 4
DRAM data bus 5
DRAM data bus 6
DRAM data bus 7
Digital I/O system power supply
GND
DRAM data bus 8
DRAM data bus 9
DRAM data bus 10
DRAM data bus 11
DRAM data bus 12
DRAM data bus 13
DRAM data bus 14
DRAM data bus 15
RAS output (active low)
WE output (active low)
CAS output (lower byte, active low)
CAS output (upper byte, active low)
OE output (active low)
DRAM address output 12
DRAM address output 11
DRAM address output 10
DRAM address output 9
DRAM address output 8
Function
Continued on next page.
DX-C34