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| For Audio Equipment MN6650A Signal Processing LSI for CD Players Overview The MN6650A is a digital servo LSI for creating highprecision servo systems with completely self-adjusting focus, tracking, and traverse servos. Pin Assignment Features Focus servo Tracking servo Traverse servo Automatic adjustment functions for FO/TR gain, FO/ TR offset, and FO/TR balance PWM output with tristate output from a single pin Built-in dropout countermeasures Anti-shock functions Support for both linear motor and screw-based traverse mechanisms Function to prevent runaway traverse operation Support for 3- and 1-beam systems Support for double-speed playback Microcomputer serial interface Operating voltage 4.5 to 5.5V XI TO T1 T2 T3 T4 T5 T6 VDET TBAL TRCRS 34 35 36 37 38 39 40 41 42 43 44 33 32 31 30 29 28 27 26 25 24 23 RST TLOCK FLOCK SENSE MLD MCLK MDATA TRON CLVS VSS TEST Applications CD Players QFP044-P-1010 TEST PLAY RFDET DO OFT ARF WVEL PBO TE FE VR2 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 KICK TRD FOOD TVD TRV VDD AVDD AVSS VSS LDON VR1 (TOP VIEW) MN6650A Block Diagram For Audio Equipment FE TE PBO VR1 VR2 10 9 8 12 11 A/D CONVERTER CPU OUTPUT PORT 13 2 26 31 32 1 LDON PLAY TRON FLOCK TLOCK TES WVEL SENSE MDATA MCLK MLD 7 30 27 28 29 MICROCOMPUTER INTERFACE INPUT PORT PWM 22 18 20 21 19 43 KICK TRV FOD TRD TVD TBAL TIMING GENERATOR TRACK COUNTER 34 44 25 XI OFT 42 4 RFDET TRCRS AVDD VDD AVSS VSS RST TEST T0 to 3 T4 to 6 CLVS DO VDET 16 17 15 14 33 23 5 3 For Audio Equipment Pin Descriptions 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 Symbol TES PLAY RFDET DO OFT ARF WVEL PBO TE FE VR2 VR1 LDON VSS AVSS AVDD VDD TRV TVD FOD TRD KICK TEST VSS CLVS TRON MDATA MCLK MLD SENSE FLOCK TLOCK RST XI T0 T1 T2 T3 I/O O O I I I I O I I I I I O I I I I O O O O O I I I O I I I O O O I I O O O O Function Description Tracking error shunt signal. "H" level: shunt. Play signal output. RF detection signal input. Dropout signal input. Offtrack signal input. RF signal input. Double-speed status signal output. Potentiometer signal input. Tracking error signal input. Focus error signal input. "H" level: play. "L" level: detected. "H" level: dropout "H" level: offtrack. MN6650A "H" level: double-speed. (analog input) (analog input) (analog input) Reference voltage for A/D converter. "L" level. Reference voltage for A/D converter. "H" level. Laser ON signal output. Ground for digital circuits. (0 V) Ground for analog circuits. (0 V) Power supply for analog circuits. (+5 V) Power supply for digital circuits. (+5 V) Traverse forced feed output. Traverse drive output. Focus drive output. Tracking drive output. Kick pulse output. Test pin. Keep this at "H" level. Ground for digital circuits. (0 V) Spindle servo phase synchronization signal output. "H" level: CLV. "L" level: rough servo. Tracking servo ON signal. Microcomputer command data input. Microcomputer command clock input. (Data is latched at rising edge.) Microcomputer command load signal input. "L" level: load. Sense signal output. (OFT, FESL, NACEND, NAJEND, POSAD, and SFG) Focus servo pull-in signal. Tracking servo pull-in signal. Reset input. of 1.0 Vpp.) Test pin. Leave open. Test pin. Leave open. Test pin. Leave open. Test pin. Leave open. "L" level: pull-in state. "L" level: pull-in state. "L" level: reset. "L" level: ON. (tristate) (tristate) (tristate) (tristate) (tristate) "H" level: ON. Clock input. (fXI =16.9344 MHz) (Capacitor coupling requires a minimum MN6650A Pin Descriptions (continued) Pin No. 39 40 41 42 43 44 Symbol T4 T5 T6 VDET TBAL TRCRS I/O I I I I O I For Audio Equipment Function Description Test pin. Keep this at "L" level. Test pin. Keep this at "L" level. Test pin. Keep this at "L" level. Vibration detection signal input. "H" level: vibration detected. Tracking balance adjustment output. Track cross signal input. (tristate) For Audio Equipment Package Dimensions (Unit: mm) QFP044-P-1010 MN6650A 12.30 0.40 10.000.20 33 23 22 (1.00) 10.000.20 34 44 12 1 (1.00) 0.80 11 0.350.10 2.000.20 2.100.30 12.300.40 1.150.20 0.10 SEATING PLANE 0.100.10 0.15 -0.05 0.600.20 0 to 10 +0.10 |
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