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IC INFORMATION PD5846A Function MD System controller 1/2 E Type CMOS Model MEH-P6550/ES - Pin Functions(PD5846A) Pin No. Pin Name I/O Format Function and Operation 1-5 NC Open 6 BYTE I VSS 7 CNVSS I VSS 8,9 NC O C Open 10 reset I Resetting input 11 XOUT O Main clock oscillation pin 12 VSS1 GND 13 XIN I Main clock oscillation pin 14 VCC1 5V 15 NC Not used 16 SQSY I DISC sub-code Q sink/ADIP sink 17 brst I P-BUS resetting input 18 XINT I Decoder interrupting input 19 NC O C Open 20 SENS I MD LSI SENSE output monitor 21-27 NC Open 28 XRST O C MD LSI resetting output 29 SWDT O C MD LSI IF data output 30 SRDT I MD LSI IF data input 31 SCLK I MD LSI IF clock output 32 XLAT O C MD LSI IF latch signal output 33 BSO O C P-BUS data output 34 BSI I P-BUS data input 35 BSCK I/O C P-BUS clock input/output 36 NC Open 37 bsrq O C P-BUS serial pole request output 38 BRXEN I/O C Receivable I/O 39-42 NC Open 43 LDCNT O C Laser diode ON/OFF 44 VDON O C Power ON/OFF 45-59 NC Open 60 VCC2 5V 61 CK I Clock signals 62 VSS2 GND 63-74 NC Open 75 MUTE O C Comprehensive mute output 76 CONT O C Servo-driver power control 77 MDEJECT O C Loading motor control output 78 MDLOAD O C Loading motor control output 79 LSW I Disc loading start signal input 80 CSW I Loading end signal input 81 ESW I EJECT end signal input 82 DISC I Reflectance discriminating signal input 83 HOME I C Home position detection input 84,85 NC Open