Ic401 Rh-Ix2823Af04 :System Microcomputer (Ix2823Af) (2/2) - Sharp MD-MT831H(GL) Service Manual

MD-MT831H/W

IC401 RH-iX2823AF04 :System Microcomputer (IX2823AF) (2/2)

Port Name Terminal Name Input/Output
Pin No.
60 WDTOVF WDTOVF
61 MD2 MD2
62 RES _RESET
63 NMI _NMI
64 STBY _STBY
65 Vcc VCC
66 XTAL XTAL
67 EXTAL EXTAL
68 Vss VSS
69 PF7 PF7
70 PF6 _PLAY
71 PF5 EMPH0
72* PF4 PF4
73 PF3 _DINT
74 PF2 _ARQD
75 PF1 _RPLAY
76 IRQ0 _ARQK
77 AVcc AVCC
78 Vref VREF
79 AN0 PLVDRY
80 AN1 PLVDCI
81 AN2 PLVINN
82 AN3 RKEY
83 AN4 HKEY1
84 AN5 HKEY2
85 AN6 TEMP
86 DA1 LDVAR
87 AVss AVSS
88 Vss VSS
89* P24 P24
90 TIOCB4 MCMON
91* P26 P26
92 P27 DCNT
93 PG0 SENSE
94 PG1 _FOK
95 PG2 _XRST
96 PG3 CKSTP
97 PG4 _EJSW
98 Vcc VDD
99 P10 PCNT2
100 P11 HDON
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Output Watch dog timer (not used)
Input Operation mode selection input 2
Input Microcomputer hard reset input
Input Nonmaskable interruption (not used)
Input Microcomputer standby input (not used)
— Positive power supply
— Crystal connection terminal
— Crystal connection terminal
— Ground potential
Output Reserve
Input Unit PLAY button operation detection input
Output Audio emphasis control output 0
Output Spare
Input System LSI interruption
Input Disk cap opens and closes detection/it is started and required
Input Remote control PLAY key operation detection input
Input Start request by the key /DC-IN input
— A/D and D/A converter positive power supply
— A/D and D/A converter reference voltage
Input Dry battery voltage detection input
Input DC jack voltage detection input
Input Lithium battery voltage detection input
Input Remote control key operation detection input
Input Unit key operation detection input 1
Input Unit key operation detection input 2
Input Ambient temperature detection input
Output P.U. laser power setting output
— A/D and D/A converter ground potential
— Ground potential
Output (not used)
Output Internal operation status monitor
Output Spare
Output Mechanism driver enable output
Input System LSI servo sense input
Input Focus OK signal input
Output System LSI hard reset output
Output Microcomputer standby operation monitor output
Input Ejection lever operation detection input
— Positive power supply
Output Vcc supply control output of power IC
Output Recording head current control output
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Function