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Yamaha A-S501 Service Manual page 35

Integrated amplifier
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Table of Contents
Pin
Function Name
Port Name
No.
(P.C.B.)
51
P4_3/A19
ISB
52
P4_2/A18
ISA
53
P4_1/A17
CD_LED
54
P4_0/A16
PD_LED
55
P3_7/A15
DIGITAL_PON
56
P3_6/A14
DSP_N_USB_ON
57
P3_5/A13
DIR_DSP_SEL
58
P3_4/A12
NC
59
P3_3/A11
NC
60
P3_2/A10
DSP_N_READY
61
P3_1/A9
DSP_MUTE_REQ
62
Vcc2
VCC
63
P3_0/A8
NC
6
4
V
s s
V
S
S
65
P2_7/AN2_7/A7
NC
66
P2_6/AN2_6/A6
PRE_N_MT
67
P2_5/INT7/AN2_5/A5
Z2_N_MT
68
P2_4/INT6/AN2_4/A4
DSP_N_INT_REQ
69
P2_3/AN2_3/A3
PRI
70
P2_2/AN2_2/A2
+5S_PON
71
P2_1/AN2_1/A1
DEST
72
P2_0/AN2_0/A0
MODEL
73
P1_7/INT5/D15
TU_GPIO
74
P1_6/INT4/D14
NC
75
P1_5/INT3/D13
PW_DET
76
P1_4/D12
DSP_N_RST
77
P1_3/TXD6/SDA6/D11
DSP_SDA
78
P1_2/RXD6/SCL6/D10
DSP_SCL
79
P1_1/CLK6/D9
TU_N_RST
80
P1_0/CTS6/RTS6/D8
PRY
81
P0_7/AN0_7/D7
SW_N_MT
82
P0_6/AN0_6/D6
PWR_MGT
83
P0_5/AN0_5/D5
THM2
84
P0_4/AN0_4/D4
THM1
85
P0_3/AN0_3/D3
BASS
86
P0_2/AN0_2/D2
TREBLE
87
P0_1/AN0_1/D1
BALANCE
88
P0_0/AN0_0/D0
LOUDNESS
89
P10_7/AN7/KI3
PRD
90
P10_6/AN6/KI2
AD_VOL
91
P10_5/AN5/KI1
VRUP
92
P10_4/AN4/KI0
VRDN
93
P10_3/AN3
PRV
94
P10_2/AN2
KEY1
95
P10_1/AN1
KEY0
96
Avss
AVSS
97
P10_0/AN0
THM3
98
Vref
VREF
99
Avcc
AVCC
100 P9_7/ADTRG/SIN4
DIG_SW
I/O
I
I
I
Encoder phase detection input/output for Input selector
I
I
I
Encoder phase detection input/output for Input selector
I
I
I
CD Direct LED control
O
O
O
Pure Direct LED control
O
O
O
Digital power supply 5V control signal of DIGITAL printed circuit boards
I
O
O
Signal for USB insertion detection
O
O
O
DIR, DSP select signal
O
O
O
Free terminal
O
O
O
Free terminal
I
O
O
USB DSP GP6[0] operation status
I
O
O
USB DSP GP6[1] mute request
MCU
MCU
MCU
O
O
O
Free terminal
M
C
U
M
C
U
M
C
U
O
O
O
Free terminal
I
I
O
PRE OUT MUTE control
Low=MUTE ON
O
I
I
ZONE2 MUTE control
Low=MUTE ON
IRQ
IRQ
IRQ
Interrupt output from USB DSP GP6[7] USB DSP
AD
AD
AD
AMP current protection
O
O
O
+5S drive control
AD
AD
AD
Destination discrimination AD value input
AD
AD
AD
MODEL discrimination AD value input
IRQ
IRQ
IRQ
TUNER GRIO interrupt input
Low=Normal Hi=Abnormal
-
-
-
Free terminal
IRQ
IRQ
IRQ
PW_DET detection interrupt input
O
O
O
USB DSP reset terminal Reset USB DSP from microprocessor
SIO
I
I
USB DSP control serial data
SO
I
I
USB DSP control serial clock
O
I
I
TUNER reset terminal
O
I
I
Power relay control
O
I
I
Subwoofer MUTE control
Low=MUTE ON
I
I
I
Power management detection input
AD
AD
AD
Right-hand side heat sinc temperature detection AD value input
AD
AD
AD
Left-hand side heat sinc temperature detection AD value input
AD
AD
AD
BASS position detection AD value input
AD
AD
AD
TREBLE position detection AD value input
AD
AD
AD
BALANCE position detection AD value input
AD
AD
AD
LOUDNESS position detection AD value input
AD
AD
AD
DC protection detection
AD
AD
AD
VOLUME position detection AD value taken input
O
O
O
MOTOR VOLUME +direction control
O
O
O
MOTOR VOLUME -direction control
AD
AD
AD
Protection voltage detection AD value taken input
AD
AD
AD
KEY1 AD value input (SPEAKER SELECT SW)
AD
AD
AD
KEY0 AD value input (CD DIRECT SW/PURE DIRECT SW)
MCU
MCU
MCU
AD
AD
AD
For Diode Bridge temperature detection of Main Amp
MCU
MCU
MCU
MCU
MCU
MCU
I
I
I
DIG_SW input
A-S501/A-S301
Detail of Function
35

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