Sharp MS722 Service Manual - Page 44

MD-MS722/C/WMS721W FUNCTION TABLE OF IC IC401 RH-iX2772AF03(IX2772AF):System Microcomputer (1/2) Pin No. Port Name Terminal Name Input/Output Function 1 P12/TCLKA CIN Input Track cross signal/focus drive detection 2 P13 SPIN Output Spindle motor FG pulse detection input 3 P14 DISCIN Input Disc insertion detection input 4 P15 DISCCPR Input Disc record inhibition switch input 5* TIOCA2 SPWDS Input Spindle motor FG pulse width detection 6 P17 PDCNT Output Inner detection PD current control output 7 Vss VSS - Ground potential 8 TxD0 RMDAT Output Remote control indication data output 9 TxD1 DSPDAT Output Unit indication data output 10 P32 DSPSTB Output Unit indication strobe output 11* P33 P33 Output Spare 12* SCK0 SCk0 Output Serial IO clock output (not used) 13 SCK1 DSPSCK Output Unit indication data clock output 14 PE0 _EPCS Output EEPROM chip selection output 15 PE1 EEPD Input/Output EEPROM serial data input/output 16 PE2 EEPK Output EEPROM serial clock output 17 PE3 PHOLD Output System power ON holding output when battery is used 18 Vss VSS - Ground potential 19 PE4 PCNT1 Outout Vref supply control output of power IC 20 PE5 SYRS Output System LSI register selection output 21 PE6 _SYRD Output System LSI read enable output 22 PE7 _SYWR Output System LSI write enable output 23-30 PD0-PD7 SYD0-SYD7 Input/Output System LSI parallel data bus 31 Vss VSS - Ground potential 32 PC0 PCLAT Output Record audio IC data latch output 33 PC1 _MCPGI Input Microphone plug insertion detection input 34 PC2 _INPGI Input Line/digital plug insertion detection 35 PC3 INPGCK Input Line/digital plug type detection 36 PC4 RCPCNT Output Record circuit power control output 37 PC5 TEST1 Input Test mode setting input 1 38 PC6 TEST0 Input Test mode setting input 0 39 PC7 JPNP Input Kana conversion/Kana input existence/nonexistence discrimination 40 Vcc VCC - Positive power supply 41* PB0 PB0 Output Spare 42 PB1 _ELONH Output Remote control EL'H' lighting control output 43* PB2 PB2 Output Spare 44 PB3 LDON Output P.U. laser ON/OFF control output 45 PB4 OPICGA Output P.U. detection sensitivity selection output 46 PB5 RFLAT Output RF amplifier IC data latch output 47 PB6 RACLK Output RF/Audio IC data clock output 48 PB7 _ELONL Input/Output Remote control EL 'L' lighting control output 49 Vss VSS - Ground potential 50 PA0 RADAT Output RF/Audio IC serial data output 51 PA1 PBLAT Output Audio IC data latch output 52 PA2 REC Input Unit REC key operation detection input 53 PA3 PBOPON Output Audio IC output stage control output 54 P20 RPLAY Input Remote control PLAY key operation detection input 55 P21 _KHOLD Input Unit key hold switch input 56 TIOCC3 BUZOUT Output Beep sound pulse output 57 MD0 MD0 Input Operation mode selection input 0 In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside. - 44 -