Function Table Of Ic; Hold Switch - Sharp MS722 - MiniDisc Recorder - Metallic Service Manual

MD-MS722/C/WMS721W
IC401 RH-iX2772AF03(IX2772AF):System Microcomputer (1/2)
Port Name Terminal Name Input/Output
Pin No.
1 P12/TCLKA CIN
2 P13 SPIN
3 P14 DISCIN
4 P15 DISCCPR
5* TIOCA2 SPWDS
6 P17 PDCNT
7 Vss VSS
8 TxD0 RMDAT
9 TxD1 DSPDAT
10 P32 DSPSTB
11* P33 P33
12* SCK0 SCk0
13 SCK1 DSPSCK
14 PE0 _EPCS
15 PE1 EEPD
16 PE2 EEPK
17 PE3 PHOLD
18 Vss VSS
19 PE4 PCNT1
20 PE5 SYRS
21 PE6 _SYRD
22 PE7 _SYWR
23-30 PD0-PD7 SYD0-SYD7
31 Vss VSS
32 PC0 PCLAT
33 PC1 _MCPGI
34 PC2 _INPGI
35 PC3 INPGCK
36 PC4 RCPCNT
37 PC5 TEST1
38 PC6 TEST0
39 PC7 JPNP
40 Vcc VCC
41* PB0 PB0
42 PB1 _ELONH
43* PB2 PB2
44 PB3 LDON
45 PB4 OPICGA
46 PB5 RFLAT
47 PB6 RACLK
48 PB7 _ELONL
49 Vss VSS
50 PA0 RADAT
51 PA1 PBLAT
52 PA2 REC
53 PA3 PBOPON
54 P20 RPLAY
55 P21 _KHOLD
56 TIOCC3 BUZOUT
57 MD0 MD0
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.

FUNCTION TABLE OF IC

Input Track cross signal/focus drive detection
Output Spindle motor FG pulse detection input
Input Disc insertion detection input
Input Disc record inhibition switch input
Input Spindle motor FG pulse width detection
Output Inner detection PD current control output
— Ground potential
Output Remote control indication data output
Output Unit indication data output
Output Unit indication strobe output
Output Spare
Output Serial IO clock output (not used)
Output Unit indication data clock output
Output EEPROM chip selection output
Input/Output EEPROM serial data input/output
Output EEPROM serial clock output
Output System power ON holding output when battery is used
— Ground potential
Outout Vref supply control output of power IC
Output System LSI register selection output
Output System LSI read enable output
Output System LSI write enable output
Input/Output System LSI parallel data bus
— Ground potential
Output Record audio IC data latch output
Input Microphone plug insertion detection input
Input Line/digital plug insertion detection
Input Line/digital plug type detection
Output Record circuit power control output
Input Test mode setting input 1
Input Test mode setting input 0
Input Kana conversion/Kana input existence/nonexistence discrimination
— Positive power supply
Output Spare
Output Remote control EL'H' lighting control output
Output Spare
Output P.U. laser ON/OFF control output
Output P.U. detection sensitivity selection output
Output RF amplifier IC data latch output
Output RF/Audio IC data clock output
Input/Output Remote control EL 'L' lighting control output
— Ground potential
Output RF/Audio IC serial data output
Output Audio IC data latch output
Input Unit REC key operation detection input
Output Audio IC output stage control output
Input Remote control PLAY key operation detection input
Input Unit key hold switch input
Output Beep sound pulse output
Input Operation mode selection input 0
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Function