Sharp SD-AT50 Service Manual page 60

SD-AT50
IC701 RH-iX0564AW00: System Microcomputer (IX0564AW) [Serial No. 208XXXXX Only]
IC701 RH-iX0564AWZZ: System Microcomputer (IX0564AW) [Serial No. 209XXXXX~]
Pin No.
Port Name
1 D3
2* D4
3 D5
4 D6/CNTR0
5 D7/CNTR1
6 P20/SCK
7 P21/SOUT
8 P22/SIN
9 RESET
10 CNVSS
11 XOUT
12 XIN
13 VSS
14 VDD
15 VDCE
16 P30/INT0
17 P31/INT1
18 AIN0/CMP0-
19 AIN1/CMP0+
20 AIN2/CMP1-
21 AIN3/CMP1+
22 P00
23 P01
24 P02
25 P03
26 P10
27 P11
28 P12
29 P13
30 D0
31 D1
32 D2
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Terminal Name Input/Output
A/D_RESET Output
N.C. Output
SP_RLY Output
BASS_SW Output
AC_DETECT Input
AMP_CLK Input
AMP_SIN Output
AMP_SOUT Input
RESET Input
CNVSS Input
XOUT Output
XIN Input
VSS Input
VDD Input
VDCE Input
AMP_INT Output
POWER_ON Input
+B_CHECK Input
PROTECT Input
FAN_CHK Input
FAN_LOCK Input
F_S_MUTE Output
C_S_MUTE Output
S_S_MUTE Output
W_S_MUTE Output
AMP_STB Input
— Input
SYS_STOP Input
OFF_SET Input
UNSW_CHK Input
POWER Output
-B_CONT Output
Output of 1 bit AMP∆∑ IC reset control.
"H" output : normal operation, reset when switching from "L" to "H".
Open terminal. "L" is output, PWB is open.
Speaker relay output. (For all the speakers)
"H" output : relay ON, electric conduction, "L" output : relay OFF
Output for controlling the gain of SUBWOOFER amp.
"H" output : BASS OFF, "L" output : BASS ON
Power failure check with the voltage after the AC rectification.
Normal : "L", power failure detection when switching from "L" to "H".
Clock input for communication with the system microcomputer.
Serial auto send/receive.
Data output to the system microcomputer. Serial auto send/receive.
Data input from the system microcomputer. Serial auto send/receive.
Reset input for this microcomputer. Active "L".
0 V (GND).
Reference oscillation output for this microcomputer.
2 MHz ceralcok connection.
Reference oscillation input for this microcomputer.
2 MHz ceralcok connection.
GND terminal.
Positive power supply terminal.
Control of the operation and stop of voltage drop detect circuit.
Used in the stop status (connected to GND).
Communication request signal to the system microcomputer.
Request when switching from "H" to "L".
SW input for POWER ON/OFF test mode.
"H" : normal status, "L" : TEST mode ON/OFF
Power rise monitoring input.
Decision of the reset timing of 1 bit AMP.
A/D import, system abnormality detect input.
A/D import, FAN motor rotation detect input.
A/D import, FAN motor lock detect input.
Front speaker S-MUTE output.
"H" output : MUTE-ON, "L" output : MUTE-OFF.
Center speaker S-MUTE output.
"H" output : MUTE-ON, "L" output : MUTE-OFF.
Surround speaker S-MUTE output.
"H" output : MUTE-ON, "L" output : MUTE-OFF.
Subwoofer speaker S-MUTE output.
"H" output : MUTE-ON, "L" output : MUTE-OFF.
Communication request signal from the system microcomputer.
Request when switching from "H" to "L".
PULL_UP
Power failure detect input. This microcomputer switches to the backup mode.
Normal : "H", power failure detection when switching from "H" to "L".
Abnormality detection output of 1 bit AMP∆∑ IC output offset voltage.
L : abnormal
Power rise timing control. The power is not risen in "L".
Output of power supply control.
"L" output : POWER ON, "H" output : POWER OFF.
Control output for - B power supply control relay of 1 bit AMP section.
"L" output : relay ON, -B supply "H" output : relay OFF
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Function