Bose CD-20 Service Manual page 64

CD MECHANISM IC PIN CONFIGURATION TABLES
IC 801 (CXD2517Q) Digital Signal Processor Table (continued)
Pin I / O
No.
43 O
44
45
46 O
47 I
48 I
49 O
50 I
51 I
52 I
53 I
54 I
55 I
56 O
57 O
58 -
59 O
60 I
61 I
62 I
63 I
64
IC 821 (CXA1782BQ) Servo Signal Processor RF Amplifier Table
Pin I / O
No.
1 I
2 I
3 I
4 I
5 I
6 O
7 I
8 I
9 I
10 I
11 I
Terminal
Name
SCOR Outputs high signal when either
subcode sync S0 or S1 is detected.
N C
N C
S Q S O SubQ 80-bit serial output.
SQCK SQSO readout clock input.
Mute High: mute; low: release
SENS SENS output to CPU.
XRST System reset. Reset when low.
Data Serial data input from CPU.
XLAT Latch input from CPU. Serial data is
latched at the falling edge.
CLOCK Serial input from SSP.
SEIN Sense input from SSP.
CNIN Track jump count signal input.
DATO Serial data output to SSP.
XLTO Serial data latch output to SP. Latched
at the falling edge.
Vdd Power supply (+5V).
CLKO Serial data transfer clock output to
SSP.
SPOA Microcomputer extended interface
(input A).
SPOB Microcomputer extended interface
(input B).
SPOC Microcomputer extended interface
(input C).
SPOD Microcomputer extended interface
(input D).
N C
Terminal
Name
FEO Focus error amplifier output. Connected
internally to the FZC comparator input.
FEI Focus error input.
FDFCT Capacitor connection pin for defect time
constant.
FGD Ground this pin through capacitor when
decreasing the focus servo high-
frequency gain.
FLB External time constant setting pin for
increasing the focus servo low
frequency.
FE_O Focus drive output.
FE_M Focus amplifier negative input pin.
SRCH External time constant setting pin for
generating focus servo wave form.
TGU External time constant setting pin for
switching tacking high-frequency gain.
TG2 External time constant setting pin for
FSET High cut off frequency setting pin for
focus and tracking phase compensation
amplifier.
64
Description
Description