Sharp XL-HP500 Service Manual - Page 40

XL-HP500 IC1 VHiLC78646E-1: CD Servo (LC78646E) (2/2) Pin No. Terminal Name Input/Output Setting in Reset Function 44 RVSS 45 RCHO 46 RVDD - Output Input - LVDD /2 - Right channel D/A converter GND for Right channel. Must be connected to 0 V. Right channel output. Power supply for Right channel. 47 XVDD 48 XOUT 49 XIN Input Output Input - Oscillator Oscillator Crystal Oscillator Power supply for crystal oscillator. Connected for the 33.8688 MHz crystal oscillator ciement. 50 FSX/16MIN Input/Output Input 7.35 kHz Synchronization signal monitor port. or Clock input port for Digital filter & D/A 51 XVSS - - Crystal GND for crystal oscillator. Must be connected to 0 V. Oscillator 52* C2F Output H C2 FLAG monitor port. 53* EFLG Output L C1, C2 error corrected monitor port. 54* 16MOUT Output Clock 16.9344 MHz output port. 55 ASLRCK Input - Left/Right clock input port. (If this port does not use, must be connect to 0 V.) 56 ASDACK Input - Anti-shock Bit clock input port. (If this port does not use, must be connect to 0 V.) 57 ASDFIN Input - Left/Right channel data input port. (If this port does not use, must be connect to 0 V.) 58* LRCK Output L Left/Right clock output port. 59* BCK Output L Digital data Bit clock output port. 60* DATA Output L Left/Right channel data output port. 61 CE Input - Chip enable signal input port. 62 CL Input - Microcomputer Data transfer clock input port. 63 DI Input - Interface Data input port. 64 DO Output (H) Data output port. (N-ch. open drain output.) 65 *WRQ Output H Interruption signal output. 66 *RES Input - Chip reset signal input port. This port must be set LOW after first applied power on. 67 DRF Output L Focus detection output port. 68 VDD5 Input - Power supply for Microprocessor. 69 VSS - - GND for digital circuit. Must be connected to 0 V. 70* CONT3 71* CONT2 72* CONT1 Input/Output Input/Output Input/Output Input Input Input General purpose port 3. Controlled with serial data command from microcomputer. When not used, General purpose input/ General purpose port 2. output terminal. Set it as the input terminal and open it by connecting to 0 V, or set it as the output terminal General purpose port 1. and open it. 73 PDO1 Output - Internal VCO control phase comparator output port 1. 74 PDO2 Output Input Internal VCO control phase comparator output port 2. 75 VVSS 76 PCKIST - - PLL GND for internal VCO. Must be connected to 0 V. Input - PDO output current adjustment resistor connection port. 77 VVDD Input - Power supply for internal VCO. 78 FR Input - VCO frequency range adjustment port. 79 LDS Input - LASER power detected signal input port. 80 LDD Output - LASER power control signal output port. In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside. Be sure to supply the same potential to each power terminal. (VVDD, ADAVDD, VDD, LVDD, RVDD, XVDD) Terminal witch is controlled by the power terminal (VDD5 V) for a microcomputer interface : CE (61 pin), CL (62 pin), DI (63 pin), DO (64 pin), WRQ (65 pin), RES (66 pin), DRF (67 pin) - 40 -