Sharp MS722 Service Manual - Page 45

MD-MS722/C/W/MS721W IC401 RH-iX2772AF03(IX2772AF):System Microcomputer (2/2) Pin No. Port Name Terminal Name Input/Output Function 58 MD1 MD1 Input Operation mode selection input 1 59 P23 INNSW Input Mechanism inner SW position detection input 60* WDTOVF WDTOVF Output Watch dog timer (not used) 61 MD2 MD2 Input Operation mode selection input 2 62 RES _RESET Input Microcomputer hard reset input 63 NMI _NMI Input Nonmaskable interruption (not used) 64 STBY 65 Vcc _STBY VCC Input - Microcomputer standby input (not used) Positive power supply 66 XTAL XTAL - Crystal connection terminal 67 EXTAL EXTAL - Crystal connection terminal 68 Vss VSS - Ground potential 69 PF7 _STOP Input Unit STOP key operation detection input 70 PF6 PLAY Input Unit PLAY key operation detection input 71 PF5 EMPHO Output Audio emphasis control output 0 72 PF4 JOG0 Input Jog encoder input 0 73 PF3 JOG1 Input Jog encoder input 1 74* PF2 PF2 Output Spare 75* PF1/IRQ1 _IRQ1 Output Software standby return request 76 IRQ0 _DINT Input System LSI interruption request input 77 AVcc AVCC - A/D and D/A converter positive power supply 78 Vref VREF - A/D and D/A converter reference voltage 79 AN0 PLVDRY Input Dry battery voltage detection input 80 AN1 PLVDCI Input DC jack voltage detection input 81 AN2 PLVINN Input Lithium battery voltage detection input 82 AN3 RKEY Input Remote control key operation detection input 83 AN4 HKEY1 Input Unit key operation detection input 1 84 AN5 HKEY2 Input Unit key operation detection input 2 85 AN6 TEMP Input Ambient temperature detection input 86 DA1 LDVAR Output P.U. laser power setting output 87 AVss AVSS - A/D and D/A converter ground potential 88 Vss VSS - Ground potential 89 P24 90 TIOCB4 START MCMON Input Output Disc insertion start-up detection input Internal operation status monitor output 91* P26 P91 Output Spare 92 P27 DCNT1M Output Mechanism driver enable output 93 PG0 SENSE Input System LSI servo sense input 94 PG1 _FOK Input Focus OK signal input 95 PG2 _XRST Output System LSI hard reset output 96 PG3 CKSTP Output Microcomputer sleeve operation monitor output 97 PG4 98 Vcc EJSW VCC Input - Ejection lever operation detection input Positive power supply 99 P10 PCNT2 Output Vcc supply control output of power IC 100 P11 HDON Output Recording head current control output In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside. - 45 -