SD-AT50H (serv.man17). Function table of IC - Sharp Audio Service Manual (repair manual). Page 7

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SD-AT50H
– 50 –
38
P60/CTS0/RTS0
DSP_CS
Input
DSP IC serial send/receive strobe output.
39
P57/RDY/CLKOUT
DSP_RESET
Output
DSP IC RESET output.
40*
P56/ALE
N.C.
Output
Set it as an output terminal and fix it to Low since it is not used.
41
P55/HOLD
FLASH_EPM
Input
Connected to VSS via pull-down resistor.
(Setting for when writing on Flash)  Functionally not used.
42*
P54/HLDA
DSP_UC15
Output
External ROM for DSP download program. Page select output.
43*
P53/BCLK
DSP_US16
Output
External ROM for DSP download program. Page select output.
44*
P52/RD
DSP_UC17
Output
External ROM for DSP download program. Page select output.
45*
P51/WRH/BHE
N.C.
Output
Set it as an output terminal and fix it to Low since it is not used.
46
P50/WRL/WR
FLASH_CE
Input
Connected to VCC via pull-up resistor.
(Setting for writing on Flash)
47
P47/CS3
TIMER_LED
Output
Timer stand-by LED control.
“H” output : LED on, “L” output : LED off
48
P46/CS2
DD_LED
Output
DOLBY DIGITAL IND.
“H” output : LED on, “L” output : LED off
49
P45/CS1
STD_LED
Output
Sound MODE STANDARD IND.
“H” output : LED on, “L” output : LED off
50
P44/CS0
DTS_LED
Output
DTS IND.
“H” output : LED on, “L” output : LED off
51
P43/A19
SURR_LED
Output
Sound MODE STANDARD IND.
“H” output : LED on, “L” output : LED off
52
P42/A18
STEREO_LED
Output
STEREO IND.
“H” output : LED on, “L” output : LED off
53
P41/A17
DPL_LED
Output
DOLBY PRO LOGIC IND.
“H” output : LED on, “L” output : LED off
54
P40/A16
B_LIGHT
Output
LCD backlight circuit control output.
“H” : backlight ON, “L” : backlight OFF
55
P37/A15
VOL_DA
Output
Data latch output for the electron VOL IC control signal.
56
P36/A14
VOL_CL
Output
Output of the clock for the electron VOL IC control signal.
57*
P35/A13
N.C.
Output
Set it as an output terminal and fix it to Low since it is not used.
58*
P34/A12
N.C.
Output
Set it as an output terminal and fix it to Low since it is not used.
59*
P33/A11
N.C.
Output
Set it as an output terminal and fix it to Low since it is not used.
60*
P32/A10
N.C.
Output
Set it as an output terminal and fix it to Low since it is not used.
61
P31/A9
TEST1
Input
Input terminal for test. If it is “L” at RESET, it switches to a mode
where it operates separately without communicating with the
microcomputer.
62
VCC
VCC
Input
Power supply input for this microcomputer.  (3.3 V)
Backup power supply.
63*
P30/A8(/-/D7)
N.C.
Output
Set it as an output terminal and fix it to Low since it is not used.
64
VSS
GND
—
Connected to GND (VSS).
65*
P27/A7(/D7/D6)
ROM
Output
Fixed to L.
66
P26/A6(/D6/D5)
DSP_ABOOT
Output
Fixed to H.
67*
P25/A5(/D5/D4)
N.C.
Output
Set it as an output terminal and fix it to Low since it is not used.
68*
P24/A4(/D4/D3)
N.C.
Input/Output
Set it as an output terminal and fix it to Low since it is not used.
69*
P23/A3(/D3/D2)
L-MUTE
Output
Audio mute output of the VCR OUT.
H : MUTE OFF, L : MUTE ON
70
P22/A2(/D2/D1)
DIG_FUNC+B
Output
Power supply control output for external DIG. input.
External DIG. FUNC : “L” output, Others : “H” output
71
P21/A1(/D1/D0)
BASS-SW
Output
Output for controlling the gain of the SUBWOOFER amp.
“H” output : BASS OFF, “L” output : BASS ON.
72
P20/A0(/D0/-)
S_MUTE
Output
System mute control output.
“L” output : mute ON, “H” output: mute OFF.
73
P17/D15/INT5
NONPCM
Input
Input for detecting whether the AUDIO signal is PCM or not.
“L” : AUDIO PCM, “H” : NON AUDIO PCM.
IC301 RH-iX0563AWZZ: DSP System Microcomputer (IX0563AW) (2/3)
Terminal Name
Pin No.
Input/Output
Function
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Port Name
Display
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