MITSUBISHI
SOUND
PROCESSOR
MITSUBISHI
SOUND
PROCESSOR
ICsICs
M62475FP
M62475FP
AUTOMATIC ADJUSTMENT
CD ADJUSTMENT
PREAMPLIFIER
SERVO CONTROLLER
AUTOMATIC
CD PREAMPLIFIER
SERVO CONTROLLER
DESCRIPTION
The M62475FP is an IC that contains preamplifier/servo amplifier necessary for optical pickup servo
control for CD player.
This IC also supports automatic adjustment with microcomputer control.
FEATURES
Pickup servo control can consist of the M62475FP only
Supporting 3-beam system
Built-in serial data command interface with MCU to reduce load
on MCU
Built-in circuit for automatically adjusting tracking balance,
tracking/focus gain
Built-in internal self reset circuit
Outline 42P2R-A
0.8 mm pitch 450 mil SSOP
(8.4 mmX17.5 mmX2.0 mm)
RECOMMENDED OPERATING CONDITIONS
Supply voltage range..............................................VCC=4.5 to 5.5V
Rated supply voltage.......................................................... VCC=5V
SYSTEM CONFIGURATION
DSP for CD
FOCUS ACTUATOR
M62475FP
FOCUS
SERVO
HF
PREAMPLIFIER
OPTICAL
PICK-UP
PD
LD
FE PREAMPLIFIER
APC
FOCUS
SEARCH
TE PREAMPLIFIER
MITSUBISHI
ELECTRIC
MCU I/F
AUTOMATIC
ADJUSTMENT
RESET
TRACKING
SERVO
SLIDE SERVO
TRACKING
ACTUATOR
SLIDE
MOTOR
MCU
for
CONTROL
( 1 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
BUILT-IN FUNCTION
PIN CONFIGURATION (TOP VIEW)
A 1
42 ABC
B 2
41 HFI
C 3
40 HFO
E 4
39 MRC
F 5
38 APC OUT
37 APC -
SGT 6
TE -
• IV amplifier
• HF amplifier:HF (High Frequency Amp.)
• Focus Error Amplifier:FE (Focus Error Amp.)
• Focus Servo Amplifier:FS (Focus Servo Amp.)
• Tracking Error Amplifier:TE (Tracking Error Amp.)
• Tracking Servo Amplifier:TS (Tracking Servo Amp.)
• Sledge Motor Servo Amplifier:SS (Sledge Servo Amp.)
• Switching Circuit for Jump Brake:
TG1SW, TG2SW (Tracking Gain SW)
JF SW, JR SW (Jump Forward/Reverse SW)
SF SW, SR SW (Sledge Forward/Reverse SW)
• Focus Search Circuit
Search Signal Generator
FSOK Detector
• Track Cross Detector: TC Det (Track Cross Detector)
• Shock Detector: SC Det (Shock Detector)
• Logic Controller:
Serial Data Command Interface
Jump, Brake, Focus Search Control
Adjustment Control
• Vcc/2 generation circuit
• Auto Laser Power Control: APC (Automatic laser Power Control)
• HF Bottom Level Detector
• MR Detector
• Automatic Adjustment Circuit
Tracking balance adjustment circuit
Tracking gain adjustment circuit
Focus gain adjustment circuit
Gain adjustment signal generation and phase detection circuit
36 APC +
7
35 CFSR
TEG 8
34 SGF
33 FE -
M62475FP
TG1SW 9
TE OUT 10
TC/SHOCK 11
TS + 12
TG2SW 13
32 FEG
31 FS 30 FSOUT
TS - 14
29 VCC
28 RIREF
TS OUT 15
SS + 16
27 CLPF
SS - 17
26 DOUT
SS OUT 18
25 MSD
DETFIL 19
24 MCK
BIAS 20
23 JP1/SG
GND 21
22 MLA/DIS
Outline
42P2R-A
CONSTANT
CONSTANT
FE
FS
FOR
FOR
JP1
HF
CONSTANT
APC
FOCUS REVERSE REVERSE POWER ADJUSTMENT DATA
REVERSE INPUT FOR MIRROR REVERSE INPUT SEARCH INPUT
INPUT SUPPLY
FILTER
INPUT
INPUT
APC NONSGF
DATA
CLOCK
LATCH
ABC
HF
APC
FE GAIN
FS
REFERENCE
REVERSE
OUTPUT CONTROL OUTPUT CURRENT OUTPUT INPUT
INPUT
OUTPUT OUTPUT OUTPUT
INPUT
IC INTERNAL BLOCK DIAGRAM
41
A+B+C
42
40
39
38
37
36
35
33
34
32
MR
10k
10k
30
FS
AMPLIFIER
FS
SW
28
27
26
25
23
24
I/F
ADJUST
RESET
FE
AMPLIFIER
220k A-B
220k
56k
47k
47k
220k
39k
TE
AMPLIFIER
220k
TG1
SW
18k
100k
TG2
SW
47k
1
B
2
3
B
INPUT
A
INPUT
C
VCC/2
SS
SW
22k
4
5
E
INPUT
C
INPUT
6
7
8
F
TE REVERSE
INPUT
INPUT
10
9
SGT
TE GAIN
OUTPUT CONTROL
TE
OUT
TG1
SW
SS
AMPLIFIER
TS 22k
AMPLIFIER
47k
TS1
SW
EF
BIAS
(COM)
SF SR
SW SW
JF JR
SW SW
2.2k
A
47k
TC/SHOCK DET
TC/SH SW
I/V
AMPLIFIER
39k
22
12k
FOCUS
SEARCH
4.7k
29
2.2k
22k
APC
MIRROR
HF
AMPLIFIER
31
11
12
13
TS NONREVERSE
INPUT
TC/
SHOCK
MITSUBISHI
ELECTRIC
14
15
16
17
18
19
20
21
TS
REVERSE
INPUT
TG2
SW
SS NONSS
REFERENCE
REVERSE
OUTPUT
VOLTAGE
INPUT
INPUT
TS
SS
GND
CONSTANT FOR
OUTPUT REVERSE ADJUSTMENT
INPUT
FILTER
( 2 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
Symbol
A
B
C
E
F
SGT
TE TEG
TG1 SW
TE OUT
TC/SHOCK
TS +
TG2 SW
TS TS OUT
SS +
SS SS OUT
DET FIL
BIAS
GND
MLA/DIS
JP1/SG
MCK
MSD
DOUT
CLPF
IREF
Vcc
FSOUT
FS FEG
FE SGF
CFSR
APC +
APC APC OUT
MRC
HF OUT
HF ABC
Function
I-V amplifier A input
I-V amplifier B input
I-V amplifier C input
I-V amplifier E input
I-V amplifier F input
Tracking servo signal output
TE amplifier reverse input
TE amplifier gain control
Tracking gain select switch 1
TE amplifier output
Tracking cross/shock detector input
TS amplifier non-reverse input
Tracking gain select switch 2
TS amplifier reverse input
TS amplifier output
SS non-reverse input
SS amplifier reverse input
SS output
Detector filter for gain adjustment
Vcc/2 voltage output
Ground
Latch of serial data from microcomputer to servo IC/discharge of LPF for automatic adjustment
Control signal of 1 track jump brake pluse/Input of gain adjustment clock
Serial data transfer clock from microcomputer to servo IC
Microcomputer serial data
Output of data to microcomputer
Connects capacitor for determining the constant for automatic adjustment LPF
Connects resistance for setting current value of reference supply current
Power supply
FS amplifier output
FS amplifier reverse input
FE amplifier gain control
FE amplifier reverse input
Focus servo signal output
Connects the capacitor to determine the constant for focus search waveform
APC amplifier non-reverse input
APC amplifier reverse input
APC amplifier output
Constant for mirror
HF amplifier output
HF amplifier reverse input
IV amplifier (A+B+C) output
ABSOLUTE MAXIMUM RATINGS (Ta=25˚C, unless otherwise noted)
Symbol
VCC
VI
Pd
K
Topr
Tstg
Parameter
Supply voltage
Input voltage
Power dissipation
Thermal derating (Ta 25˚C)
Operating ambient temperature
Storage temperature
Ratings
5
0 to VCC
750
7.5
-20 to +75
-40 to +125
MITSUBISHI
ELECTRIC
Unit
V
V
mV
mW/˚C
˚C
˚C
( 3 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
ELECTRICAL CHARACTERISTICS (Ta=25˚C, Vcc=5V, f=1kHz, CBA=100, unless otherwise noted)
Block
—
HF
FS OK
MR
APC
FE
FS
FSR
TE
TS
Symbol
Icc
VREF
GVHFAB
GVHFC
fHF
VHHF
VLHF
VOSHF
VTFK
RMN
RMJ
fMR
GVAP
ATTAP
VHAP
VLAP
VOSAP
GVFE
VHFE
VLFE
BALFE
GVFS
ATTFS
VHFS
VLFS
VOSFS
VFSR +
VFSR VFZC
GVTE
VHTE
VLTE
VOSTE
BALTE
GVTS
ATTTS
VHTS
VLTS
VOSTS
Parameter
Circuit current
Reference voltage
Gain (input A/B)
Gain (input C)
Frequency characteristics
Output voltage "H"
Output voltage "L"
Output offset
FSOK level
Ratio (normal)
Ratio (jump)
Frequency characteristics
Gain
Attenuation (APC OFF)
Output voltage "H"
Output voltage "L"
Input offset
Gain
Output voltage "H"
Output voltage "L"
Balance
Gain
Attenuation (FS OFF)
Output voltage "H"
Output voltage "L"
Output offset
Focus search + voltage
Focus search - voltage
Focus zero cross voltage
Gain
Output voltage "H"
Output voltage "L"
Output offset
Track balance
Gain
Attenuation (TS OFF)
Output voltage "H"
Output voltage "L"
Output offset
Test conditions
With no signal provided, after reset
With no signal provided, after reset
f=500kHz,Vi=0.5VP-P
f=500kHz,Vi=0.5VP-P
Vi=0.5VP-P
Vi=4.0V
Vi=1.0V
VREF reference
VREF reference
"Shock" mode
"Brake" mode
"Shock" mode
Vi=20mVrms
Comparison with GVAP
Vi=4.0V
Vi=1.0V
VREF reference
Vi=10mVrms
Vi=4.0V
Vi=1.0V
Comparison with GVFE
Vi=50mVrms
Comparison with GVFS
Vi=4.0V
Vi=1.0V
VREF reference
VREF reference, pin 35
VREF reference, pin 35
VREF reference
Vi=50mVrms
Vi=4.0V
Vi=1.0V
VREF reference
VREF reference
Vi=50mVrms
Comparison with GVTS
Vi=4.0V
Vi=1.0V
VREF reference
MITSUBISHI
ELECTRIC
Min.
20.0
2.4
3.1
9.7
1.4
3.5
—
-60
-0.22
0.35
0.46
20
25
60
4.0
—
-10
2
3.5
—
-2
19.3
60
3.5
—
-50
+0.6
-1.0
-0.22
7.0
3.5
—
-25
-1.5
-0.6
60
3.5
—
-25
Limits
Typ.
30.0
2.5
5.1
11.7
2.0
4.0
1.0
0
-0.16
0.45
0.56
30
27
—
—
—
0
4
4.0
1.0
0
21.3
—
4.0
1.0
0
+0.8
-0.8
-0.16
9.0
4.0
1.0
0
+1.5
1.4
—
4.0
1.0
0
Max.
40.0
2.6
7.1
13.7
—
—
1.5
+60
-0.10
0.55
0.66
—
29
—
—
1.0
+10
6
—
1.5
+2
23.3
—
—
1.5
+50
+1.0
-0.6
-0.10
11.0
—
1.5
+25
+4.5
3.4
—
—
1.5
+25
Unit
mA
V
dB
dB
MHz
V
V
mV
V
—
—
kHz
dB
dB
V
V
mV
dB
V
V
%
dB
dB
V
V
mV
V
V
V
dB
V
V
mV
%
dB
dB
V
V
mV
( 4 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
ELECTRICAL CHARACTERISTICS (Ta=25˚C, Vcc=5V, f=1kHz, CBA=100, unless otherwise noted) (cont.)
Block
—
TC
SHOCK
TG
SS
RESET
ADJ
CMP
SG
Symbol
Parameter
Test conditions
VJF
VJR
VTC +
VTC VSH +
VSH ATG1ON
ATG1OFF
ATG2ON
ATG2OFF
GVTS
ATTSS
VHSS
VLSS
VOSSS
VSF
VSR
VRST
VORST
GVFE(max)
GVFE(min)
GVTE(max)
GVTE(min)
BALTE(max)
BALTE(min)
VPhFE +
VPhFE VPhTE +
VPhTE VBAL +
VBAL GLADJ
Vthc +
Vthc GLC
VSGF +
VSGF VSGT +
VSGT -
Jump voltage (forward)
Jump voltage (reverse)
Track cross + voltage
Track cross - voltage
Shock + voltage
Shock - voltage
Attenuation (TG1 ON)
Attenuation (TG1 OFF)
Attenuation (TG2 ON)
Attenuation (TG2 OFF)
Gain
Attenuation (SS OFF)
Output voltage "H"
Output voltage "L"
Output offset voltage
Slide voltage (forward)
Slide voltage (reverse)
Reset voltage
Output voltage
Max. gain (FE)
Min. gain (FE)
Max. gain (TE)
Min. gain (TE)
Max. balance (TE)
Min. balance (TE)
Phase difference + voltage
Phase difference - voltage
Phase difference + voltage
Phase difference - voltage
Balance + voltage
Balance - voltage
"JF" mode, VREF reference
"JR" mode, VREF reference
"Brake" mode, VREF reference
"Brake" mode, VREF reference
"Shock" mode, VREF reference
"Shock" mode, VREF reference
"Shock" mode, VREF reference
"Shock" mode, VREF reference
"Shock" mode, VREF reference
"Shock" mode, VREF reference
Vi=50mVrms
Comparison with GVSS
Vi=4.0V
Vi=1.0V
VREF reference
"SF" mode, VREF reference
"SR" mode, VREF reference
Pin 20
Pin 36 , after RESET
Focus gain" mode CBA=111
"Focus gain" mode CBA=000
"Track gain" mode CBA=111
"Track gain" mode CBA=000
"Track balance" mode CBA=111
"Track balance" mode CBA=000
"Focus gain" mode phase difference (90+30)˚
"Focus gain" mode phase difference (90-30)˚
"Track gain" mode phase difference (90+30)˚
"Track gain" mode phase difference (90-30)˚
"Track balance" mode +0.5V offset
"Track balance" mode -0.5V offset
C (Pin 19 )=680pF
VREF reference
VREF reference
C (Pin 27 )=2.2nF
Pin 34 , VREF reference
Pin 34 , VREF reference
Pin 6 , VREF reference
Pin 6 , VREF reference
Phase detection exit low pass filter gain
Comparator level +
Comparator level Low pass filter gain
SGF + output voltage
SGF - output voltage
SGT + output voltage
SGT - output voltage
MITSUBISHI
ELECTRIC
Min.
+0.10
-0.20
+42.5
-42.5
+110
-170
10
0
10
0
10
60
3.5
—
-25
+0.65
-1.25
2.1
3.5
3.5
-3.5
19
12
8.0
-12.8
3.1
1.5
3.1
1.5
2.8
1.8
-5
0
-50
-5
0.6
-0.8
0.6
-0.8
Limits
Typ.
+0.15
-0.15
+62.5
-62.5
+140
-140
20
—
20
—
12
—
4.0
1.0
0
+0.95
-0.95
2.3
4.5
5.5
-1.5
21
14
11.0
-9.8
3.3
1.7
3.3
1.7
3.0
2.0
-3
—
—
-3
0.7
-0.7
0.7
-0.7
Max.
+0.20
-0.10
+82.5
82.5
+170
-110
—
2
—
2
14
—
—
1.5
+25
+1.25
-0.65
2.5
—
7.5
0.5
23
16
14.0
-6.8
3.5
1.9
3.5
1.9
3.2
2.2
-1
+50
0
-1
0.8
-0.6
0.8
-0.6
Unit
V
V
mV
mV
mV
mV
dB
dB
dB
dB
dB
dB
V
V
mV
V
V
V
V
dB
dB
dB
dB
%
%
V
V
V
V
V
V
dB
mV
mV
dB
V
V
V
V
( 5 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
EQUIVALENT CIRCUIT
FUNCTION DESCRIPTION
Setting Built-in Constant Current Source Current Value
The current value of Tracking Servo (TS) and Sledge Servo (SS)
constant current can be set with resistance value Rx connected
between pin
28
and Vcc.
B
If the absolute values for TS and SS constant source current
values are assumed to be I
(JF, JR)
and I
(SF, SR),
respectively, they
M62475FP
are set as follows.
35
I (JF. JR) = 1 • VCC-V
8
Rx
I (SF, SR) = 1 • VCC-V
4
Rx
Where, V
28
V
28
=V
21
21
,V
30
28
ZERO CROSS
A
28
28
FOCUS SEARCH
CIRCUIT
SEARCH
VOLTAGE
DETECTION
is the voltage of pin
is assumed to be V
31
28
. If the voltage of pin
21
(GND)
can be found by the following formula.
+ VBE (VBE = 0.7V standard)
CONSTANT CURRENT SOURCE BLOCK DIAGRAM
FZC OPERATION TIMING CHART
VCC
FOCUS SEARCH
FOCUS SERVO ON
OPERATION
VA
RX
M62475FP
28
29
14
t
A Vref
17
VB
VFSR+
CURRENT
REFERENCE
B
Vref
VFSR-
t
Vc
tup
VBE
tFSR
IJF
IJR
ISF
ISR
FSR Detector
Setting FSR time tFSR (CFSR setting)
When the focus search is performed, the focus search direction is
tFSR= CFSR
IFSR
automatically switched.
The focus search always starts from the + side. The polarity ( +
/
tdown
- direction) internal logic signal of the focus search voltage is
CFSR:CFSR pin
35
external capacitor
IFSR:Focus search current
used for control and switching.
At time of rising:110µA
FZC detection is effective only in a direction.
At time of falling:60µA
FSR Vth± Voltage setting
Vth+:Vref+0.7V
Vth-:Vref-0.7V
MITSUBISHI
ELECTRIC
( 6 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
AUTOMATIC ADJUSTMENT FUNCTION
The IC is capable of automatically adjusting the three places of
tracking balance, tracking gain and focus gain.
EQUIVALENT CIRCUIT (Tracking Balance)
TRACKING BALANCE ADJUSTMENT
The input resistance of the I/V conversion amplifier connected to E
and F pickups and the 8-step adjustment resistance built in a
feedback resistance are switched for the adjustment.
TRACKING
ACTUATOR
The
PD
adjustment precision is approximately 3% by the step.
ADJUSTMENT
RESISTANCE
The automatic adjustment operation enters an oscillation signal
from the automatic adjustment signal generator of MCU into a
E
VOLTAGE
COMPARATOR
F
MONITOR
TERMINAL
(to MCU)
servo loop to forcibly make the beam cross the track. When this is
the case, the output voltage of I/V conversion amplifier is
I/V CONVERSION
AMPLIFIER
ADJUSTMENT
RESISTANCE
integrated. If the E and F output signals are well balanced and are
the same, an error voltage is not generated in the output voltage
after this integration and a reference voltage is obtained. If they
are not balanced, a voltage of a DC component is generated. The
BIAS
VOLTAGE
BIAS
VOLTAGE
result of having compared this output voltage and the reference
voltage is converted into a logical level and is then output to the
monitor terminal. The MCU is used for control and the result is
judged. According to the result, the adjustment resistance of the
I/V conversion amplifier is sequentially switched step by step for
EQUIVALENT CIRCUIT (Tracking Focus Gain)
the adjustment in the direction of reversing the current logical
result. At the time when the result has been reversed, the error is
GAIN ADJUSTMENT
ERROR AMPLIFIER
judged to be put within a one-step error and the adjustment is
TRACKING ACTUATOR
OR FOCUS ACTUATOR
complete.
EX-OR
TRACKING FOCUS GAIN ADJUSTMENT
The input resistance of the tracking focus error amplifier and the 8-
VOLTAGE
COMPARISON
ACTUATOR
To DATA-OUT
MCU
step adjustment resistance built in a feedback resistance are
switched for the adjustment.
The adjustment precision is
approximately 1 dB by the step.
The adjustment operation enters an oscillation signal with the
MCU
BIAS
COMMAND
VOLTAGE
LATCH SIGNAL
output gain of -3 dB in a servo loop from the automatic adjustment
signal generator of MCU into a servo loop to forcibly generate a
gap in the track and focus. A waveform adjusted signal of the
generated tracking focus error signal and the MCU oscillation
signal are collated with each other with respect to the phase and is
then integrated to convert the phase difference into the voltage.
The result of having compared this output voltage and the
reference voltage is converted into a logical level and is then
output to the monitor terminal. The MCU is used for control and
the result is judged. According to the result, the input resistance of
the amplifier is sequentially switched step by step in feedback
resistance for the adjustment in the direction of reversing the
current logical result.
At the time when the result has been
reversed, the error is judged to be put within a one-step error and
the adjustment is complete.
MITSUBISHI
ELECTRIC
( 7 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
AUTOMATIC ADJUSTMENT FLOWCHART
BASIC ROUTINE
AUTOMATIC ADJUSTMENT EXAMPLE
Serial data command: XXOOOCBA (XX is specified according to
the adjustment command.)
V
Vthc+
CLPF PIN 27 Vref
Vthc-
START
t
Initialization for XX
DOUT PIN 26
t
0
DATA OUT=0
MCU CHECK
POINT
NO
YES
CBA=4
ADJ COMMAND
NO
CBA > 0
YES
Setting of CBA
DATA OUT=1
YES
7
6
V
Setting of CBA
NO
6
END OF
ADJUSTMENT
YES
CBA-1
5
NO
CBA < 7
CBA+1
DATA OUT=0
CLPF PIN 27
Vthc+
Vref
Vthc-
t
NO
YES
DOUT PIN 26
t
0
Setting of CBA
CBA+1
Setting of CBA
CBA-1
MCU CHECK
POINT
ADJ COMMAND
CBA=4
5
6
5
END OF
ADJUSTMENT
END
MITSUBISHI
ELECTRIC
( 8 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
SERIAL COMMAND FUNCTION
FUNCTION DESCRIPTION of Data-IN
An 8-bit shift register is installed in the logic controller to convert
Of the 8-bit data, high order 4 bits (D7 to D4) is used to select a
(decode) serial data (MSD pin
command mode and low-order 4 bits (D3 to D0) are used to set
25
) from the microcomputer into a
command for the servo IC.
(instruct) the command status.
Commands in the same mode can be given concurrently with data
transferred once.
They are held until new data is entered.
Therefore, the command status is held if another mode is selected.
SERIAL COMMAND FUNCTION TABLE
MSD pin
Mode selection
D6
D5
Command Name
D7
SERVO
0
0
Focus
D4
Brake
/Shock
Track balance
Track Gain
Focus Gain
0
1
1
1
0
1
—
—
—
—
—
—
25
input
D3
—
—
—
Command status setting
D2
D1
Track
D0
Sledge
C
C
C
B
B
B
Data out
pin output
FSOK/TC
A
A
A
ADJ
ADJ
ADJ
Note 1. Output from DOUT pins 25 is automatically switched by selecting each mode.
2. The status in the Servo Mode is set with two bits for each of command Track (D3,D2) and sledge(D1,D0).
COMMAND FUNCTION TABLE
Command
FS ON
Brake
Mode
Focus
Track1
Shock
Track
Track2
Sledge
Data
Function
1 ON
• APC amplifier ON
• Focus search start to servo ON (PS SW="OPEN")
0 OFF
• APC amplifier OFF
• Focus servo OFF (FS SW = "CLOSE")
D5
D4
1
0
D3 D2
0
0 TS OFF
JR
0
1
1
0
JF
TS ON
1
1
D3 D2
0
0 SS OFF
SR
0
1
1
0
SF
SS ON
1
1
Jump brake (jump setting) operation
Opens/closes TSSW.
Controls SW 'TG SW' for track gain switching.
Track servo OFF
Reverse jump
Forward jump
Track servo ON
For TSSW, JF SW, and JR SW, refer to 'TRACK
Function Table'.
Sledge servo OFF
Reverse sledge
Forward sledge
Sledge servo ON
For SS SW, SF SW, and SR SW, refer to 'TRACK
Function Table'.
MITSUBISHI
ELECTRIC
( 9 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
SERIAL DATA (MSD) TRANSFER METHOD
Data is transferred with LSB first and the MLA signal is sent to
execute the command.
SERIAL DATA INPUT TIMING CHART
LSB
MSD
MSB
D0
D1
D2
D3
PIN 25 INPUT
D4
D5
D6
D7
th
tsu
MCK
PIN 24 INPUT
twck
MLA
twck
1/fck
PIN 22 INPUT
td twl
LOGIC INPUT CONDITIONS
Symbol
fck
twck
tsu
th
td
twl
Test conditions
Parameter
Min.
—
2.5
0.1
2.5
2.5
1
Clock frequency
Clock pulse width
Setup time
Hold time
Delay time
Latch pulse width
Limits
Typ.
100
5
0.2
5
5
5
Max.
200
—
—
—
—
—
Unit
kHz
µs
µs
µs
µs
µs
BRAKE
Setting the break command to "1" performs the jump brake
operation to improve the jump setting capability after the track
jump.
Jump Brake Operation
The track servo loop is set to OFF with TC="
" (at the falling
edge of TCDet output) when MR is 1.
The track servo loop is set to ON with TC="
" (at the falling
edge of TCDet) when MR is 0.
Jump Brake True Value List (Effective in the TS ON mode)
INPUT
TC Det
MIRROR
1 ("Mirror")
0 ("Track")
OUTPUT
TS SW status
OPEN (track servo OFF)
CLOSE (track servo ON)
TRACK CROSS DET
"1"
"0"
TE
VREF-62.5mV
VREF+62.5mV
Note 3. TC/SHSW "CLOSE", TG SW "OPEN"
SHOCK
With the SHOCK command set to "1", the shock operation is
carried out to switch the track gain at time of shock.
Jump Brake Operation
With SHOCK detect=1, the track gain is placed in the shock
mode.
With SHOCK Det=0, the track gain is placed in the normal
mode.
Shock True Value List (Effective in the TS ON mode)
INPUT
SHOCK Det
1 ("SHOCK")
0 ("NORMAL")
SHOCK DETECTOR
OUTPUT
TG SW status
OPEN (Shock mode)
CLOSE (Normal mode)
"1"
"0"
V-
VREF
V+
TE
Note 4. TC/SH SW "OPEN"
5. V + and V - are set with external constant.
MITSUBISHI
ELECTRIC
( 10 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
TRACK FUNCTION TABLE
INPUT
DATA
COMMAND
D3 D2
0
0
TS OFF
0
1
JR
1
0
JF
1
1
TS ON
OUTPUT (SW Status)
TS SW
OPEN (Servo OFF)
OPEN (Servo OFF)
OPEN (Servo OFF)
CLOSE (Servo ON)
JF SW
OFF
OFF
ON
OFF
JR SW
OFF
ON
OFF
OFF
SLEDGE FUNCTION LIST
INPUT
DATA
COMMAND
D1 D0
0
0
SS OFF
0
1
SR
1
0
SF
1
1
SS ON
OUTPUT (SW status)
TS SW
CLOSE (Sledge OFF)
CLOSE (Sledge OFF)
CLOSE (Sledge OFF)
OPEN (Sledge ON)
SF SW
OFF
OFF
ON
OFF
JR SW
OFF
ON
OFF
OFF
DIRECT COMMAND FUNCTION
JP1 signal
When a 1-track jump takes place, serial data to be transferred
twice can be omitted to control the amount of delay in processing
time.
JP1 is generally set to "1". When JP1 is set to "0" with TC (Data
out) signal set to "1", the logic controller automatically reverses the
jump polarity (JF to JR or JR to JF).
When a jump is complete (after fixed time Ta), switching JP1 from
"0" to "1" can automatically terminate JF and JR to select the TR
ON/SSON status.
Signal Waveform with a jump
KICK PULSE (JF OR JR)
TS OUT
Ta
BRAKE PULSE
JP1
MITSUBISHI
ELECTRIC
( 11 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
JP1 SIGNAL TRUE VALUE LIST
JP1
(INPUT)
1
TRACK mode
00
TSOFF
TRACK (D3, D2)
11
10
TS ON
JF
01
JR
00
SS OFF
SLEDGE (D3, D2)
11
10
SS ON
SF
01
SR
1
0
TSOFF
TS ON
JR
JF
SS OFF
SS ON
SR
SF
0
1
TSOFF
TS ON
JF
JR
SS OFF
SS ON
SF
SR
LOGIC OUTPUT FUNCTION
Data out
Data out output is switched according to the serial command (D6,
D7="0", "0") mode (see the serial command function list).
The output corresponding to the serial command mode sent last is
given.
Data Out Output Corresponding List
Data out signal name
(1)
(2)
FSOK
TC
Serial command mode (input)
FOCUS (0010XXXX)
TRACK (0001XXXX)
(1) FS ON
(2) TC
With FS SW=OPEN (servo ON), FSOK "0" is output.
The TC signal that latches the MR signal at the edge (falling edge)
of TCDet output is output.
FSOK TRUE VALUE LIST
Input
FF SW status
CLOSE (Servo OFF)
CLOSE (Servo ON)
TC TRUE VALUE LIST
Output
FSOK
1
0
Input
MR
TC Det
Output
TC
"1"Mirror
1
"0"Track
0
While FS OK is set to "1", TS SW is open (servo OFF) and SS SW
is open regardless of the command status.
MR signal detector
Detects an envelope of the HF signal and sends data to the
internal logic controller.
MITSUBISHI
ELECTRIC
( 12 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
CONTROL METHOD FLOWCHART EXAMPLE
2
DISC_START
Note: Since this description applies to an example on the item
DISC_START
related to the servo, take into account the entire system when
using this. In addition, pay attention to the
Pick-up innermost
circumference ?
simplification/reduction of actions in abnormal status.
1
2
3
4
5
6
7
8
POWER_RESET
DISC_START
BALANCE_ADJ
TRACK_ADJ
FOCUS_ADJ
ADJUST
SE_OUT
Jump control
8-1. SINGLE_JUMP
8-2. SHORT_JUMP
8-3. MID_JUMP
8-4. LONG_JUMP
NO
Move inside
[00000001] sending
YES
:Processing with power turned on
:Disk start processing
:Track balance processing
:Track gain adjustment
:Focus gain adjustment
:Adjustment routine
:Adjustment signal output routine
Move pick-up to outside
[00000010] sending
Spindle motor rotation start
Wait 50
msec
FOCUS ON sending
[00100000]
1
POWER_RESET
Data Out=0 ?
POWER_RESET
NO
FOCUS servo
check
YES
System initialization
Track servo ON
[00101111] sending
Set adjustment initial value
(Send the default value)
BAL=100
FOC=100
TRA=100
FOCUS_ADJ
BALANCE_ADJ
Focus gain preparatory adjustment
Track balance conflict adjustment
HFD=0
END
CRC=1 ?
Note:BAL :Track balance
FOC :Focus gain
TRA :Track gain
NO
DSP read check
YES
TRACK_ADJ
Tracking gain adjustment
FOCUS_ADJ
Focus gain adjustment
BALANCE_ADJ
Track balance adjustment
END
Note:Pick-up servo operation preparatory completion. For example,
reading TOC requires to move pick-up to the innermost circumference.
MITSUBISHI
ELECTRIC
( 13 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
3
BALANCE_ADJ
4
BALANCE_ADJ
TRACK_ADJ
5
FOCUS_ADJ
TRACK_ADJ
FOCUS_ADJ
ZZ=10
CBA=TRA
ZZ=11
CBA=FOC
ADJUST
ADJUST
ADJUST
TRA=CBA
FOC=CBA
BAL=CBA
END
END
HFD=1
ZZ=01
CBA=BAL
HFD=0
END
6
ADJUST
7
SG_OUT
ADJUST
SG_OUT
T=50
Send [ZZ000CBA]
No latch signal
SG_OUT
Hold "L" for T msec latch signal
(For T msec LPF capacitor discharge)
T=25
Data Out=0 ?
NO
ZZ=11
NO
YES
YES
ZZ=10
CBA > 0 ?
NO
CBA < 7 ?
CBA=CBA-1
CBA=CBA+1
SG_OUT
SG_OUT
YES
CBA=CBA+1
YES
YES
YES
Data Out=1
NO
NO
NO
Data Out=0
JP1
1300 Hz output
for 160 msec
JP1
1800 Hz output
for 160 msec
JP1
80 Hz output
for 160 msec
NO
YES
END
CBA=CBA-1
Note: Set the frequency of the adjustment signal according to the system.
Send [ZZ000CBA]
END
MITSUBISHI
ELECTRIC
( 14 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
Jump control
The jump control is divided into the following four types according to
8
(Note) Put the check routing of the HFD status in a program. Read the main
routine and sub-codes for check, regardless the jump control.
the track count.
Type
8-1. SINGLE_JUMP
8-2. SHORT_JUMP
8-3. MID_JUMP
8-4. LONG_JUMP
N: Track count (standard)
1 to 5
6 to 16
to 100
to 1000
NO
Data Out=0
YES
HFD=0
8-1. SINGLE_JUMP
8-2. SHORT_JUMP
SINGLE_JUMP
Move to the inside
HFD=1
SHORT_JUMP
HFD=1
NO
YES
Move to the outside
Send [00100100]
Send [00101000]
Send [00100100]
Send [00101000]
Send [00111111]
(No latch signal)
COUNT
HFD=1
DATA OUT=1
JP1=0
Set timer to 5 msec
NO
SJ1
CATCH
YES
JP1=0
JP1=1
SJ2
Wait 260µsec
Wait 15msec
Send latch signal
Send [00101111]
Wait 5µsec
JP1=1
N=N-1
HFD=0
N=0
NO
END
YES
Send [00111111]
JP1=1
END
MITSUBISHI
ELECTRIC
( 15 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
COUNT
CATCH
NBY2=N/2
Send [00111111]
(No latch signal)
Set timer to 5 msec
JP1=0
DATA OUT=1
NO
LC=180µsec/ (Loop time)
LOOPN=LC
YES
NBY2=N/2
NO
Time over
YES
NBY2 > 0
DATA OUT=1
NO
NO
YES
YES
NO
NO
DATA OUT=1
Time over ?
DATA OUT=1
YES
LC=LC-1
YES
Time over
LC=LOOPN
YES
NO
NO
NO
Time over ?
NO
LC=0
YES
YES
LC=LC-1
END
NO
LC=0
YES
Send latch pulse
END
MITSUBISHI
ELECTRIC
( 16 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
8-3. MID_JUMP
8-4. LONG_JUMP
MID_JUMP
LONG_JUMP
JP1=1
Move to the outside
NO
Move to the outside
YES
YES
Send [00111010]
Send [00110101]
Send [00111010]
Wait 4msec
HFD=1
HFD=1
Wait 150msec
JP1=0
Send [00111000]
Set timer to 8 msec
Wait 30msec
CATCH
Set the timer to 120 msec
SJ2
NO
(Jump to the
SHORT_JUMP label)
SJ2
MITSUBISHI
ELECTRIC
Send [00110101]
(Jump to the
SHORT_JUMP label)
( 17 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
TEST CIRCUIT
5V
10µ
10k
0.047µ
22µ
TEST
CONTROLLER
470k
25
24
23
TS OUT RIREF
SS +
SS -
SS OUT
DETFIL
BIAS
GND
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
39k
39k
18k 220k 220k
1.8k
47k
100k
FS 56k
4.7M 100k
1k 2.2k
6.8k 100k
1k
39k 4.7k
MLA/DIS
TS -
3
CLPF
TG2SW FSOUT
VCC
TS +
2
FEG
TC/
SHOCK
1
SGF
TE OUT FE -
22
TG1SW
JP1/SG
26
CFSR
27
TEG
28
APC +
29
TE -
30
APC -
31
SGT
32
APC OUT
33
F
34
MRC
35
E
36
HFO
37
C
38
HFI
39
150k
B
40
1.2M 100k
100k
ABC
41
22k
4.7k 2.2k
MCK
18k
1.8k 200k
A
42
100n
100k
MSD
1µ
1k
DOUT
1k
0.047µ
2.2n
18k
47µ
22k
6.8k 2.2k
680p
Units Resistance :
Capacitance :F
MITSUBISHI
ELECTRIC
( 18 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
TYPICAL CHARACTERISTICS
POWER DISSIPATION Pd (mW)
THERMAL DERATING (MAXIMUM RATING)
1000
800
750
600
400
375
200
0
25
0
50
75
125
100
AMBIENT TEMPERATURE Ta (˚C)
22k
MCU
A+B+C
41
40
39
HF
37
36
35
34
33
32
31
30
29
2.2µ
28
27
26
25
24
23
CD DSP
22
APC
2.2k
22k
MIRROR
10k
FS
12k
FOCUS
SEARCH
4.7k
I/F
ADJUST
FS
SW
FE
10k
56k
82p
MLA/DISCH
680k
1.5M
38
47µ
22n
3.3M 100k
10µ
100n
42
1k
JP1/SG
10k
CLOCK
39k
6.8k
68k
DATA IN
22n
DATA OUT
10k
0.47µ
F.ACT
27
47µ
6.8k
39p
1k
MLA
HFD
APPLICATION EXAMPLE
RESET
220k A-B
220k
56k
47k
47k
47k
220k
TE
39k
39k
18k
2.2k 100k
TG2
SW
47k
BIAS
(COM)
SF SR
SW SW
JF JR
SW SW
TC/SH SW
TG1
SW
220k
VCC/2
SS
SW
SS
22k
TS 22k
A
1
B
2
C
3
E
4
TS1
SW
F
5
47k
6
7
8
9
10
11
12
13
1M
3.3k
82k
5.6k
100p
14
15
16
17
1µ
0.22µ
100
100n
0.22µ
15k
22n
39k
T.Act
18
19
20
100n
2.2µ
5.6k
4.7µ
10k
SL.Motor
Units
MITSUBISHI
ELECTRIC
21
39k
6.8k 100k
56k
Resistance:
Capacitance:F
( 19 / 19 )