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MITSUBISHI SOUND PROCESSOR ICs MITSUBISHI SOUND PROCESSOR ICs
M62475FP M62475FP AUTOMATIC ADJUSTMENT CD ADJUSTMENT CD PREAMPLIFIERCONTROLLER AUTOMATIC PREAMPLIFIER SERVO 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 RECOMMENDED OPERATING CONDITIONS
Supply voltage range..............................................VCC=4.5 to 5.5V Rated supply voltage.......................................................... VCC=5V
0.8 mm pitch 450 mil SSOP (8.4 mmX17.5 mmX2.0 mm)
SYSTEM CONFIGURATION
DSP for CD FOCUS ACTUATOR
M62475FP
HF PREAMPLIFIER
FOCUS SERVO
MCU I/F
OPTICAL PICK-UP PD FE PREAMPLIFIER
FOCUS SEARCH
AUTOMATIC ADJUSTMENT
RESET
MCU for CONTROL
LD
APC
TE PREAMPLIFIER
TRACKING SERVO
SLIDE SERVO
TRACKING ACTUATOR
SLIDE MOTOR
MITSUBISHI ELECTRIC
( 1 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
PIN CONFIGURATION (TOP VIEW)
A1 B2 C3 E4 F5 SGT 6 TE 7 42 ABC 41 HFI 40 HFO 39 MRC 38 APC OUT 37 APC 36 APC + 35 CFSR 34 SGF 33 FE 32 FEG 31 FS 30 FSOUT 29 VCC 28 RIREF 27 CLPF 26 DOUT 25 MSD 24 MCK 23 JP1/SG 22 MLA/DIS
BUILT-IN FUNCTION
* 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
TEG 8 TG1SW 9 TE OUT 10 TC/SHOCK 11 TS + 12 TG2SW 13 TS - 14 TS OUT 15 SS + 16 SS - 17 SS OUT 18 DETFIL 19 BIAS 20 GND 21
M62475FP
Outline
42P2R-A
IC INTERNAL BLOCK DIAGRAM
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
42
A+B+C
41
40
39
MR
38
37
APC
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
MIRROR HF AMPLIFIER
2.2k 22k FS SW
FS AMPLIFIER
ADJUST
I/F
10k
10k
4.7k
FOCUS SEARCH
FE AMPLIFIER
12k RESET
220k A-B 220k 220k 220k 18k
TE AMPLIFIER
47k TC/SHOCK DET JF JR SW SW 47k TG2 SW 22k SS SW
TS 22k AMPLIFIER
56k 47k 47k BIAS (COM) VCC/2
I/V AMPLIFIER
39k
39k
TG1 SW 100k 2.2k
TC/SH SW
SF SR SW SW
SS AMPLIFIER
A
B
C
EF
TS1 SW
47k
1
2 B INPUT
3
4 E INPUT
5
6
7
8
9
10 TE OUT
11
12
13
14
15
16
17
18
19
20
21
SGT TE GAIN OUTPUT CONTROL
TS NONREVERSE INPUT
TS REVERSE INPUT
A INPUT
C INPUT
F TE REVERSE INPUT INPUT
TG1 SW
TC/ SHOCK
TG2 SW
SS NONSS REFERENCE REVERSE OUTPUT VOLTAGE INPUT INPUT TS SS GND CONSTANT FOR OUTPUT REVERSE ADJUSTMENT INPUT FILTER
MITSUBISHI ELECTRIC
( 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=25C, unless otherwise noted)
Symbol VCC VI Pd K Topr Tstg Parameter Supply voltage Input voltage Power dissipation Thermal derating (Ta 25C) Operating ambient temperature Storage temperature Ratings 5 0 to VCC 750 7.5 -20 to +75 -40 to +125 Unit V V mV mW/C C C
MITSUBISHI ELECTRIC
( 3 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
ELECTRICAL CHARACTERISTICS (Ta=25C, Vcc=5V, f=1kHz, CBA=100, unless otherwise noted)
Block -- 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 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
HF
FS OK MR
APC
FE
FS
FSR
TE
TS
MITSUBISHI ELECTRIC
( 4 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
ELECTRICAL CHARACTERISTICS (Ta=25C, Vcc=5V, f=1kHz, CBA=100, unless otherwise noted) (cont.)
Block -- TC SHOCK Symbol 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 Parameter 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
Phase detection exit low pass filter gain
Test conditions "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
TG
SS
RESET
ADJ
CMP
SG
Comparator level + Comparator level Low pass filter gain SGF + output voltage SGF - output voltage SGT + output voltage SGT - output voltage
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
MITSUBISHI ELECTRIC
( 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 are set as follows. I (JF. JR) = 1 * VCC-V 8 Rx I (SF, SR) = 1 * VCC-V 4 Rx Where, V V
28 28
(JF, JR)
and I
(SF, SR),
respectively, they
M62475FP 35 31 30
ZERO CROSS
28
A
FOCUS SEARCH CIRCUIT SEARCH VOLTAGE DETECTION
is the voltage of pin
21
28
. If the voltage of pin
21
(GND)
is assumed to be V
28
,V
28
can be found by the following formula.
=V
21
+ VBE (VBE = 0.7V standard)
CONSTANT CURRENT SOURCE BLOCK DIAGRAM
VCC
FZC OPERATION TIMING CHART
FOCUS SEARCH FOCUS SERVO ON OPERATION VA
RX M62475FP 28 29 14 17 VB CURRENT REFERENCE VFSR+ B Vref VFSRt Vc tup tFSR tdown A Vref t
VBE
IJF
IJR
ISF
ISR
FSR Detector When the focus search is performed, the focus search direction is automatically switched. The focus search always starts from the + side. The polarity ( + /
- direction) internal logic signal of the focus search voltage is
Setting FSR time tFSR (CFSR setting)
tFSR= CFSR
IFSR CFSR:CFSR pin
35
external capacitor
IFSR:Focus search current At time of rising:110A At time of falling:60A FSR Vth Voltage setting Vth+:Vref+0.7V Vth-:Vref-0.7V
used for control and switching. FZC detection is effective only in a direction.
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. 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. adjustment precision is approximately 3% by the step. The automatic adjustment operation enters an oscillation signal from the automatic adjustment signal generator of MCU into a servo loop to forcibly make the beam cross the track. When this is the case, the output voltage of I/V conversion amplifier is 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 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 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.
TRACKING ACTUATOR OR FOCUS ACTUATOR VOLTAGE COMPARISON ACTUATOR To DATA-OUT MCU GAIN ADJUSTMENT ERROR AMPLIFIER I/V CONVERSION AMPLIFIER ADJUSTMENT RESISTANCE BIAS VOLTAGE BIAS VOLTAGE E F
EQUIVALENT CIRCUIT (Tracking Balance)
The
PD ADJUSTMENT RESISTANCE
TRACKING ACTUATOR
VOLTAGE COMPARATOR MONITOR TERMINAL (to MCU)
EQUIVALENT CIRCUIT (Tracking Focus Gain)
TRACKING FOCUS GAIN ADJUSTMENT The input resistance of the tracking focus error amplifier and the 8step adjustment resistance built in a feedback resistance are switched for the adjustment. approximately 1 dB by the step. The adjustment operation enters an oscillation signal with the 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. The adjustment precision is
EX-OR
MCU BIAS COMMAND VOLTAGE LATCH SIGNAL
MITSUBISHI ELECTRIC
( 7 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
AUTOMATIC ADJUSTMENT FLOWCHART
BASIC ROUTINE Serial data command: XXOOOCBA (XX is specified according to the adjustment command.)
Vthc+ CLPF PIN 27 Vref Vthc-
AUTOMATIC ADJUSTMENT EXAMPLE
V t
START
Initialization for XX DOUT PIN 26 0 DATA OUT=0 YES ADJ COMMAND CBA > 0 YES Setting of CBA CBA-1 NO CBA < 7 YES Setting of CBA CBA+1 NO END OF ADJUSTMENT V CLPF PIN 27 Vthc+ Vref Vthct CBA=4 5 6 7 6 NO MCU CHECK POINT
t
DATA OUT=1 YES Setting of CBA
NO
DATA OUT=0 YES
NO DOUT PIN 26 0 t
CBA+1
Setting of CBA
CBA-1 MCU CHECK POINT ADJ COMMAND END OF ADJUSTMENT CBA=4 5 6 5
END
MITSUBISHI ELECTRIC
( 8 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
SERIAL COMMAND FUNCTION An 8-bit shift register is installed in the logic controller to convert (decode) serial data (MSD pin command for the servo IC.
25
FUNCTION DESCRIPTION of Data-IN Of the 8-bit data, high order 4 bits (D7 to D4) is used to select a command mode and low-order 4 bits (D3 to D0) are used to set (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. ) from the microcomputer into a
SERIAL COMMAND FUNCTION TABLE
MSD pin Command Name D7 SERVO Track balance Track Gain Focus Gain 0 0 1 1 Mode selection D6 D5 0 1 0 1 Focus -- -- -- D4 Brake /Shock -- -- --
25
input D3 Command status setting D2 D1 Track -- -- -- C C C B B B Sledge A A A D0
Data out pin output FSOK/TC 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 Mode Data 1 ON FS ON Focus D5 0 OFF Brake Shock 1 Function * APC amplifier ON * Focus search start to servo ON (PS SW="OPEN") * APC amplifier OFF * Focus servo OFF (FS SW = "CLOSE") 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 Sledge servo OFF Reverse sledge Forward sledge Sledge servo ON For TSSW, JF SW, and JR SW, refer to 'TRACK Function Table'.
Track1
D4
Track
Track2
Sledge
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
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
MSD PIN 25 INPUT LSB D0 D1 D2 D3 D4 D5 D6 MSB D7
th tsu
MCK PIN 24 INPUT MLA PIN 22 INPUT
twck 1/fck
twck td twl Limits Typ. 100 5 0.2 5 5 5
LOGIC INPUT CONDITIONS
Symbol fck twck tsu th td twl Parameter Clock frequency Clock pulse width Setup time Hold time Delay time Latch pulse width Test conditions Min. -- 2.5 0.1 2.5 2.5 1 Max. 200 -- -- -- -- -- Unit kHz s s s s s
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=" edge of TCDet output) when MR is 1. The track servo loop is set to ON with TC=" 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)
"1" TRACK CROSS DET
" (at the falling " (at the falling
"0" VREF-62.5mV VREF+62.5mV
TE
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") OUTPUT TG SW status OPEN (Shock mode) CLOSE (Normal mode)
"1" SHOCK DETECTOR
"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 1 0 0 1 TRACK mode 00 TSOFF TSOFF TSOFF TRACK (D3, D2) 11 10 TS ON JF TS ON TS ON JR JF 01 JR JF JR 00 SS OFF SS OFF SS OFF SLEDGE (D3, D2) 11 10 SS ON SF SS ON SS ON SR SF 01 SR 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 With FS SW=OPEN (servo ON), FSOK "0" is output.
(2) TC 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) Output FSOK 1 0
TC TRUE VALUE LIST
Input MR "1"Mirror "0"Track MR signal detector Detects an envelope of the HF signal and sends data to the internal logic controller. TC Det Output TC 1 0
While FS OK is set to "1", TS SW is open (servo OFF) and SS SW is open regardless of the command status.
MITSUBISHI ELECTRIC
( 12 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
CONTROL METHOD FLOWCHART EXAMPLE
Note: Since this description applies to an example on the item related to the servo, take into account the entire system when using this. In addition, pay attention to the simplification/reduction of actions in abnormal status.
1 2 3 4 5 6 7 8 Pick-up innermost circumference ? 2
DISC_START
DISC_START
NO
Move inside [00000001] sending
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
:Processing with power turned on :Disk start processing :Track balance processing :Track gain adjustment :Focus gain adjustment :Adjustment routine :Adjustment signal output routine
YES Move pick-up to outside [00000010] sending
Spindle motor rotation start
Wait 50 msec
FOCUS ON sending [00100000]
1
POWER_RESET
POWER_RESET Data Out=0 ? YES System initialization Track servo ON [00101111] sending NO FOCUS servo check
Set adjustment initial value (Send the default value) BAL=100 FOC=100 TRA=100
FOCUS_ADJ
Focus gain preparatory adjustment
BALANCE_ADJ
Track balance conflict adjustment
HFD=0 END CRC=1 ? Note:BAL :Track balance FOC :Focus gain TRA :Track gain YES TRACK_ADJ Tracking gain adjustment
NO
DSP read check
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
BALANCE_ADJ
4
TRACK_ADJ
TRACK_ADJ
5
FOCUS_ADJ
FOCUS_ADJ
HFD=1
ZZ=10 CBA=TRA
ZZ=11 CBA=FOC
ZZ=01 CBA=BAL
ADJUST
ADJUST
ADJUST
TRA=CBA
FOC=CBA
BAL=CBA
END
END
HFD=0
END
6
ADJUST
ADJUST
7
SG_OUT
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 ? YES
NO
ZZ=11 YES
NO
ZZ=10 CBA > 0 ? YES CBA=CBA-1 SG_OUT NO CBA < 7 ? YES CBA=CBA+1 SG_OUT JP1 1300 Hz output for 160 msec JP1 1800 Hz output for 160 msec NO YES
NO
JP1 80 Hz output for 160 msec
Data Out=1 YES CBA=CBA+1
NO
Data Out=0 YES CBA=CBA-1
NO
END 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
Data Out=0 YES HFD=0
NO
HFD=1
8-1. SINGLE_JUMP
SINGLE_JUMP
8-2. SHORT_JUMP
SHORT_JUMP HFD=1
Move to the inside YES Send [00100100]
NO
Move to the outside Send [00101000] Send [00100100] Send [00101000]
Send [00111111] (No latch signal) COUNT HFD=1 JP1=0 Set timer to 5 msec SJ1 CATCH JP1=1 SJ2 Wait 15msec Send latch signal Send [00101111] Wait 5sec JP1=1 N=N-1 HFD=0 N=0 YES Send [00111111] JP1=1 END NO END
DATA OUT=1 YES JP1=0 Wait 260sec
NO
MITSUBISHI ELECTRIC
( 15 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
COUNT NBY2=N/2 Set timer to 5 msec
CATCH
Send [00111111] (No latch signal)
JP1=0 NO LC=180sec/ (Loop time) LOOPN=LC NBY2=N/2 NO Time over YES NBY2 > 0 YES NO NO DATA OUT=1 YES NO Time over ? YES LC=LC-1 NO NO LC=0 YES LC=LC-1 END NO DATA OUT=1 YES Time over ? NO NO NO
DATA OUT=1 YES
LC=LOOPN
DATA OUT=1 YES Time over YES
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
MID_JUMP JP1=1
8-4. LONG_JUMP
LONG_JUMP
Move to the outside YES Send [00111010]
NO
Move to the outside YES Send [00110101] Send [00111010]
NO
Send [00110101]
Wait 4msec HFD=1 JP1=0 Set timer to 8 msec CATCH SJ2 (Jump to the SHORT_JUMP label)
HFD=1 Wait 150msec Send [00111000] Wait 30msec
Set the timer to 120 msec
SJ2
(Jump to the SHORT_JUMP label)
MITSUBISHI ELECTRIC
( 17 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
TEST CIRCUIT
5V 10k 0.047 22 470k 2.2n 18k 1k 100n 40 HFO 39 MRC 38 APC OUT 1k 0.047 100k 1.8k 200k 1.2M 100k 34 SGF 33 TE OUT FE 32 FEG 4.7k 2.2k 150k 31 FS 30 TG2SW FSOUT 29 VCC 28 TS OUT RIREF 27 CLPF 26 DOUT 25 MSD 24 MCK 23 JP1/SG BIAS 20 47 22 MLA/DIS 21 GND 100k 10
TEST CONTROLLER
1 42 ABC
18k 41 HFI
22k 37 APC 36 APC +
35 CFSR
TC/ SHOCK
SS OUT 18 22k
TG1SW
1 39k
2 39k
3
4
5
6
7 4.7M 100k
8
9
10
11
12 56k
13
14
15
16
17
19
18k 220k 220k 1.8k
6.8k 100k 1k 39k 4.7k
47k
100k
1k 2.2k
6.8k 2.2k 680p
Units Resistance : Capacitance :F
MITSUBISHI ELECTRIC
DETFIL
TS +
SS +
TE -
TS -
SS -
SGT
TEG
C
A
B
E
F
( 18 / 19 )
MITSUBISHI SOUND PROCESSOR ICs
M62475FP
AUTOMATIC ADJUSTMENT CD PREAMPLIFIER SERVO CONTROLLER
TYPICAL CHARACTERISTICS
THERMAL DERATING (MAXIMUM RATING) 1000 POWER DISSIPATION Pd (mW)
800 750 600
400 375 200
0
0
25
50
75
100
125
AMBIENT TEMPERATURE Ta (C)
APPLICATION EXAMPLE
F.ACT
MLA HFD
22k 27 47
1k
DATA IN
10 100n 1.5M
3.3M 100k 82p
680k 56k 2.2
42
A+B+C
41
HF
40
39
MIRROR
38
37
36
35
34
33
32
31
30
FS
29
28
27
26
25
24
JP1/SG
CLOCK
10k
23
APC 2.2k 22k FS SW
ADJUST 12k
I/F
FE 10k 10k 4.7k FOCUS SEARCH
RESET
220k A-B 220k 220k 220k TE 39k 39k 18k 2.2k 100k TG1 SW JF JR SW SW 47k TG2 SW 22k TS 22k A B C E F TS1 SW 47k SS SW SF SR SW SW BIAS (COM) VCC/2 SS 47k 56k 47k 47k
1
2
3
4
5
6
1M
7
82k
8
9
3.3k 5.6k
10
56k
TC/SH SW
11
1
12
13
14
15
16
17
39k 2.2
18
19
20
6.8k 100k 0.22 100 100n 22n 39k T.Act
100n 4.7 10k SL.Motor
100p
0.22 15k
5.6k
Units
Resistance: Capacitance:F
MITSUBISHI ELECTRIC
MLA/DISCH
6.8k
DATA OUT
10k 0.47
39k
1k
22n
47
22
21
( 19 / 19 )
CD DSP
39p
6.8k
MCU 22n 68k

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