WA-MP50HS (serv.man3) - Sharp Audio Service Manual (repair manual). Page 17

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WA-MP50H/WA-MP55H
6 – 4
U2 VHISTMP3520-1: System Microcomputer (STMP3520) (3/4)
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Pin No.
Terminal Name
Input/Output
Function
49
DCDC_Batt
DCDC_Gnd
DCDC Battery.
50
DCDC_Gnd
DCDC_Gnd
DCDC Ground.
51*
ONCE_DSK
Output
Debug Clock.
52*
ONCE_DSO
Output
Debug Data Out.
53*
ONCE_DRN
Input
Debug Reset.
54
DCDC_mod2
DCDC mode pin 2.
55
MIC
Microphone Input.
56
BATT
Battery Input.
57
LINE1L
Line-in 1 Left.
HP_SENSE
Direct coupled headphones sense.
58
LRADC1
Low Resolution ADC channel 2 Input.
MIC_BIAS
Microphone bias.
59
LINE1R
Line-in 1 Right.
HP_COMMON
Direct coupled Headphones common amp.
60
LRADC2
Low Resolution ADC channel 3 input.
TEMP_SENSE
Temperature sensor bias current.
MIC_BIAS
Alternate Microphone Bias.
61
VDD5V
Input
USB/External 5V power source.
62
HPL
Headphones/Line-out Left.
63
VSSHP
Headphones Ground.
64
VDDHP
Input
Headphones Power.
65
HPR
Headphones/Line -out Right.
66
Vbg
Bandgap Decoupling Capacitor.
67
Vag
Analog Ground Decoupling Capacitor.
68
ADCL
ADC Left Filter Capacitor.
69
ADCR
ADC Right Filter Capacitor.
70
REF_RES
USB Precision Resistor.
71
RREDp
ADC Positive Reference Capacitor.
72
VSSA1
Analog Ground 1.
73
VDDA1
Input
Analog Power 1.
74
XTALO
Crystal Out.
75
XTALI
Crystal In.
76
VDDPLL
Input
PLL Power.
77
VDDXTAL
Input
Power for XTAL oscillator.
78
VSSPLL
PLL Ground.
79
FRESET
Fast Reset, Fast Falling Edge (<15ns
Powers Down Device.
PSWITCH
Power Switch.
80
USB_DP
Input/Output
USB Positive Data Line.
81
USB_DM
Input/Output
USB Negative Data Line.
82
GP11
Input/Output
GP0B11
83
GP9
Output
Pulse Width Modulator #2.
84
GP8
Input/Output
GP0B8
85
GP10
Input/Output
GP0B10
86
VDDD3
Input
Digital Core Power 3.
87
VSSD3
Digital Core Ground 3.
88
GP7
Input/Output
GP0B7
I2S_DataO2
Output
I2S Data Out 2.
PWM3
Output
Pulse Width Modulator #3.
89
GP6
Input/Output
GP0B6
I2S_DataO1
Output
I2S Data Out 1.
90
GP5
Input/Output
CGP0B5
GI2S_DataO0
Output
I2S Data Out 0.
91
GP4
Input/Output
GP0B4
I2S_BCLK
Input
I2S Bit Clock.
92
GP3
Input/Output
GP0B3
I2S_LRCLK
Input
I2S Word Clock.
93
GP2
Input/Output
GP0B2
I2S_DataI2
Input
I2S Data In 2.
94
GP1
Input/Output
GP0B1
I2S_DataI1
Input
I2S Data In 1.
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