3-23-2
PINNING OF INTEGRATED CIRCUITSMPC1718 � 4-STAGE PWM SERVODRIVER
Pin NameDirectionDescription
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SAA7372 � DECODER AND DIGITAL SERVO IC CD71Hin2? servo driverpower supply for H-bridge output section 2
2Hout2Aservo driver ? disc motorH-bridge PWM output 2A
Pin NameDirectionDescription3DCout2DC/DC converter 2 ? LC-filterconnects H-bridge DC/DC converter 2 to LC-filter
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1VSSA1GNDsupply (analog) of CD75DCout1DC/DC converter 1 ? LC-filterconnects H-bridge DC/DC converter 1 to LC-filter
2VDDA1+3.5supply (analog) of CD76Gnd1,2GNDground for H-bridge section 1 and 2
3D1CD-drive ? CD7unipolar current input (central diode signal input)7Hout1Aservo driver ? focus servoH-bridge PWM output 1A
4D2CD-drive ? CD7unipolar current input (central diode signal input)8Hin1? servo driverpower supply for H-bridge output section 1
5D3CD-drive ? CD7unipolar current input (central diode signal input)9Hout1Bservo driver ? focus servoH-bridge PWM output 1B
6VRLGNDreference input for ADC10Voutservo driver ?PWM output of DC/DC converter of VLG power supply
7D4CD-drive ? CD7unipolar current input (central diode signal input)11DTC? servo driverdead time control pin (used to set duty value of Vout output)
8R1CD-drive ? CD7unipolar current input (satellite diode signal input)12FBoutservo driver ?feedback for DC/DC converter of VLG power supply
9R2CD-drive ? CD7unipolar current input (satellite diode signal input)13INM? servo driverinverting input for DC/DC converter of VLG power supply
10IREFT? CD7current reference for calibration ADC14INP? servo drivernon-inverting input for DC/DC converter of VLG power supply
11VRHreference output from ADC15VBiasservo driver ?bias stabilizing capacitor connection pin for DC/DC converter
12VSSA2GNDsupply (analog) of CD716Vdservo driver ? +Spower switch output pin of servo driver
13SELPLL+3.5selects whether internal clock multiplier PLL is used17S.GndGNDground for internal logic of servo driver
14ISLICECD7 ?current feedback from data slicer18Vrefservo driver ? +1.2band-gap reference voltage output of servo driver
15HFIN? CD7comparator signal input19VG+VG ? servo drivergate drive power supply for output transistor,
16VSSA3GNDsupply (analog) of CD7power is supplied by using the Cg pin to form a charge pump.
17HFREF? CD7comparator common mode input20Cgservo driver ?charge pump step-up capacitor connection
18IREF? CD7reference current pin (nom. VDD/2)21Vregservo driver ? +1.8regulator output pin
19VDDA2+3.5supply (analog) of CD722Coscservo driver ?sawtooth waveform output, synchronized to the clock
20TEST1GNDtest control input23Sync? servo driverexternal clock input for separate excitation
21CRINX-Tal ? CD7crystal/resonator input
24Power?P ? servo driverpower control pin (low-active)
22CDOUTX-Tal ? CD7crystal/resonator output
25Hout3Bservo driver ? track servoH-bridge PWM output 3B
23TEST2GNDtest control input26Hin3? servo driverpower supply for H-bridge output section 3
24CL16CD7 ?16.9344MHz system clock output
27Hout3Aservo driver ? track servoH-bridge PWM output 3A
25CL11CD7 ?11.2896MHz or 5.6448MHz clock output (3-state)28Gnd3,4GNDground for H-bridge section 3 and 4
26RACD7 ? servo driverradial actuator output
29DCout3DC/DC converter 3 ? LC-filterconnects H-bridge DC/DC converter 3 to LC-filter
27FOCD7 ? servo driverfocus actuator output
30Vin+Apower supply for servo driver
28SLCD7 ? servo driverslide actuator output31DCout4DC/DC converter 4 ? LC-filterconnects H-bridge DC/DC converter 4 to LC-filter
29TEST3GNDtest control input32Hout4Aservo driver ? slide servoH-bridge PWM output 4A
30VDD1P+3.5supply (digital) of CD733Hin4? servo driverpower supply for H-bridge output section 4
31DOBMCD7 ?bi-phase mark output (3-state)
34Hout4Bservo driver ? slide servoH-bridge PWM output 4B
32VSS1GNDsupply (digital) of CD735Lim2,4+LFinput pin, limits LC-filter output voltages of sections 2 and 4
33MOTO1CD7 ? servo drivermotor output1 of CD7; versatile (3-state)
36Vinp3CD7 ? servo drivercontrol input pin, receives track servo signals from CD7
34MOTO2CD7 ?motor output2 of CD7; versatile (3-state)
H-bridge output is controlled by voltage between this pin and Vc
35SBSYCD7 ?subcode block sync (3-state)37Vinp4CD7 ? servo drivercontrol input pin, receives slide servo signals from CD7
36SFSYCD7 ?subcode frame sync (3-state)
H-bridge output is controlled by voltage between this pin and Vc
37RCK? CD7subcode clock input38VLG+3.5power supply for motor control circuit
38SUBCD7 ?P to W subcode bits (3-state)39S.GndGNDground for internal logic of servo driver
39VSS2GNDsupply (digital) of CD740VcDR_REFreference voltage for motor control circuit
40V5CD7 ?versatile output pin of CD741Vinp2CD7 ? servo drivercontrol input pin, receives disc motor control signals from CD7
41V4CD7 ?versatile output pin of CD7H-bridge output is controlled by voltage between this pin and Vc
42V3CD7 ?versatile output pin of CD7 (open drain)42Vinp1CD7 ? servo drivercontrol input pin, receives focus servo signals from CD7
43KILLCD7 ?kill output; programmable (open drain)H-bridge output is controlled by voltage between this pin and Vc
44MISCCD7 ?C2 error flag; output only defined in CD-ROM modes (3-state)43Lim1,3+LF ? servo driverinput pin, limits LC-filter output voltages of sections 1 and 3
45DATACD7 ? DACserial data output (3-state)44Hout2Bservo driver ? disc motorH-bridge PWM output 2B
46WCLKCD7 ? DACword clock output (3-state)
47VDD2P+3.5supply (digital) of CD7
48SCLKCD7 ? DACserial bit clock output (3-state)
49VSS3GNDsupply (digital) of CD7
50CL4CD7 ?4.2336MHz ?P clock output
51SDA?P ? CD7?P interface data I/O line (open drain output)TDA1545A � CONTINUOUS CALIBRATION DAC
52SCL?P ? CD7?P interface clock line
53RAB?P ? CD7?P interface R/W and load control linePin NameDirectionDescription
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54SILD?P ? CD7?P interface R/W and load control line
1BCKCD7 ? DACbit clock input of DAC
55NCno connection
56VSS4GNDsupply (digital) of CD72WSCD7 ? DACword select input of DAC
57RESET?P ? CD7power-on reset input (active low)3DATACD7 ? DACdata input of DAC
58STATUSCD7 ? ?Pservo interrupt request line/CD7 status register output (open drain)4GNDGNDground
5VDD+LFDsupply voltage
59VDD3C+3.5supply core (digital)
60C2FAILCD7 ?indication of correction failure (open drain)6IOLDAC ?left channel output
7IREFDAC ?reference voltage output
61CFLGCD7 ?correction flag output (open drain)
62V1? CD7versatile input pin8IORDAC ?right channel output
63V2? CD7versatile input pin
64LDONCD7 ? Laser supplylaser drive on output (open drain)
CS 46 173 |
ACEC
PHILIPS
