Bose CD-20 Service Manual page 63

CD MECHANISM IC PIN CONFIGURATION TABLES
IC 801 (CXD2517Q) Digital Signal Processor Table
Pin I / O
No.
1 I
2
3 O
4
5
6 I
7 O
8 I
9 O
10 -
11 -
12 I
13 -
14 I
15 I
16 I
17 O
18 I
19 O
20 O
21 O
22 O
23
24
25
26 -
27 O
28
29
30
31
32
33
34 I
35
36 I
37
38
39
40 O
41
42 -
Terminal
Name
FOK Focus OK input. Used for SENS
output and the servo auto sequencer
N C
MDP Spindle motor servo control
N C
N C
Test Test pin. Normally GND.
FILO Master PLL (slave=digital PLL) filter
output.
FILI Master PLL filter input.
PCO Master PLL charge pump output.
Vss GND.
AVss Analog GND.
CLTV Master VCO control voltage input.
AVdd Analog power supply (+5).
RF EFM signal input.
BIAS Constant current input of asymmetry
circuit.
ASYI Asymmetry comparator voltage input.
ASYO EFM full-swing output
(low=Vss, high=Vdd)
ASYE Low: asymmetry circuit off;
High: asymmetry circuit on.
WDCK D/A interface. Word clock f=2fs
LRCK D/A interface. LR clock f=fs
PCMD D/A interface. Serial data (two's
complement, MSB first).
BCK D/A interface. Bit clock.
N C
N C
N C
Vdd Power supply (+5V).
GFS GFS output.
N C
N C
N C
N C
N C
N C
XTAI 16.9344 MHz crystal oscillation circuit
input, or 33.8688 MHz input.
N C
XTSL Crystal selection input. Set low when
the crystal is 16.93444 MHz, high
when 33.8688 MHz.
N C
N C
N C
EMPH Outputs high signal when the
playback disc has emphasis, low
signal when no emphasis.
N C
Vss GND.
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Description