Sony HCD-MC1 Service Manual page 50

BD BOARD IC102 LC78622E (DIGITAL SIGNAL PROCESSOR)
Pin No. Pin Name
1 DEFI
2 TAI
3 PDO
4 VVSS
5 ISET
6 VVDD
7 FR
8 VSS
9 EFMO
10 EFMIN
11 TEST2
12 CLV+
13 CLV–
14 V/P
15 HFL
16 TES
17 TOFF
18 TGL
19 JP+
20 JP–
21 PCK
22 FSEQ
23 VDD
24 CONT1
25 CONT2
26 CONT3
27 CONT4
28 CONT5
• Abbreviation
PLL : Phase Locked Loop
EFM : Eight to Fourteen Modulation
I/O
I Defect detection signal (DEF) input (Be sure to connect to 0 when not in use)
I PLL test input to incorporates a pull-down resistor (Be sure to connect to 0V)
O PLL phase comparison output for external VCO control
— PLL ground for the built-in VCO (Be sure to connect to 0 when not in use)
I Connected to a current adjusting resistor for the PDO output
— Built-in VCO power supply
I Adjusts the VCO frequency range
— Digital Ground to be sure to connect to 0
O Slice level control to EFM signal output
I Slice level control to EFM signal input
I Test input to incorporates a pull-down resistor (Be sure to connect to 0V)
O
Disc motor control output (3-value output available depending on the command)
O
Rough servo/phase control automatic switching monitor output
O
"H":rough servo, ''L":phase servo
I Tracking detection signal input (Schmidt input)
I Tracking error signal input (Schmidt input)
O Tracking OFF output
O Tracking gain switching output (Raises gain when "L")
O
Track jump control output (3-value output available depending on the command)
O
O EFM data playback clock monitor (4.3218 MHz when phase is locked)
Sync signal detection output ("H" when a sync signal detected from the EFM signal and that
O
generated internally coincide)
— Digital power supply
General purpose output 1. Performs control using a serial data command from the
I/O microprocessor (When not in use, connect to 0V by setting to an input or set to an open state
by setting to an output)
General purpose output 2. Performs control using a serial data command from the
I/O microprocessor (When not in use, connect to 0V by setting to an input or set to an open state
by setting to an output)
General purpose output 3. Performs control using a serial data command from the
I/O microprocessor (When not in use, connect to 0V by setting to an input or set to an open state
by setting to an output)
General purpose output 4. Performs control using a serial data command from the
I/O microprocessor (When not in use, connect to 0V by setting to an input or set to an open state
by setting to an output)
General purpose output 5. Performs control using a serial data command from the
I/O microprocessor (When not in use, connect to 0V by setting to an input or set to an open state
by setting to an output)
— 74 —
Function