Yamaha R-S300 Service Manual page 36

R-S300
Pin Function Name
Port Name
No.
（P.C.B.）
62 Vcc2 VCC
63 P3_0/A8 CD_SW
64 Vss VSS
65 P2_7/AN2_7/A7 PD_SW
66 P2_6/AN2_6/A6 N_PREMT
67 P2_5/INT7/AN2_5/A5 IPD_MISO
68 P2_4/INT6/AN2_4/A4 IPD_DET
69 P2_3/AN2_3/A3 DOCK_TYPE
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 PRI
74 P1_6/INT4/D14 NC
75 P1_5/INT3/D13 PW_DET
76 P1_4/D12 NC
P1_3/TXD6/SDA6/
77 EEP_SDA
D11
P1_2/RXD6/SCL6/
78 EEP_SCL
D10
79 P1_1/CLK6/D9 PRY
80 P1_0/CTS6/RTS6/D8 DLED
81 P0_7/AN0_7/D7 N_SWMT
82 P0_6/AN0_6/D6 PWR_MGT
83 P0_5/AN0_5/D5 THMR
84 P0_4/AN0_4/D4 THML
85 P0_3/AN0_3/D3 SPBRY
86 P0_2/AN0_2/D2 SPARY
87 P0_1/AN0_1/D1 HPRY
88 P0_0/AN0_0/D0 NC
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 REC
98 Vref VREF
99 Avcc AVCC
100 P9_7/ADTRG/SIN4 DIG_SW
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
Ohm 0
V 0 – 0.22
A/D conversion
value 0 – 11
(5.0 V=255)
KEY0 DIMMER
(U, C, R, A, L models)
(95 pin of the
TP
microprocessor) (G model)
Ohm 0
V 0 – 0.22
A/D conversion
value 0 – 11
(5.0 V=255)
KEY1
PRESET
(94 pin of the
<
microprocessor)
Destination detection for AD port
Pull-up resistance 10 k-ohms
R550 (FUNCTION P.C.B.)
V
Destination
A/D conversion value (5.0 V=255)
Model detection for A/D port
Model input (A/D) pull-up resistance 10 k-ohms
R516 (FUNCTION P.C.B.)
V
Model name
A/D conversion value (5.0 V=255)
36
I/O
MCU MCU MCU
I I I
MCU MCU MCU
I I I Pure Direct detection
PRE OUT MUTE control
O O O
Low = MUTE ON
iPod communication detection interrupt input when in the standby mode
IRQ IRQ IRQ
(Used when 29 pin common terminal is not available)
IRQ IRQ IRQ iPod detection interrupt input
AD AD AD Equipment type detection AD value input
O O O +5S drive control
AD AD AD Destination discrimination AD value input
AD AD AD MODEL discrimination AD value input
POWER AMP current protection detection interrupt input
IRQ IRQ IRQ
Low = Normal, Hi = Abnormal
O O O Free terminal
IRQ IRQ IRQ PW_DET detection interrupt input
O O O Free terminal
SO O O EEPROM I2C communication bus data
SO O O EEPROM I2C communication bus clock
O O O Power relay control
O O O Direct LED power supply control
SUBWOOFER MUTE control
O O O
Low = MUTE ON
I I I Power management detection input
AD AD AD Right-hand side heatsink temperature detection AD value input
AD AD AD Left-hand side heatsink temperature detection AD value input
O O O Speaker B relay control
O O O Speaker A relay control
O O O Headphone relay control
O O O Free terminal
AD AD AD DC protection detection
AD AD AD
O O O
O O O
AD AD AD Protection voltage detection AD value taken input
AD AD AD KEY1 AD value taken input
AD AD AD
MCU MCU MCU
AD AD AD REC OUT selector voltage detection AD value taken input
MCU MCU MCU
MCU MCU MCU
I I I DIG_SW input
+ 1.0 k + 1.0 k
0.23 – 0.64 0.65 – 1.06
12 – 32 33 – 54
FM MODE
MEMORY
INFO
+ 1.0 k + 1.0 k
0.23 – 0.64 0.65 – 1.06
12 – 32 33 – 54
PRESET
FM
>
820 1.5 k 2.7 k
0.15 – 0.49 0.5 – 0.84 0.85 – 1.88
U C R, L
9 – 25 26 – 43 44 – 67
2.7 k
0.85 – 1.88
R3 (R-S300)
44 – 96
Detail of Function
+ 1.5 k + 2.2 k
1.07 – 1.55 1.56 – 2.09
55 – 79 80 – 107
CLEAR –
+ 1.5 k + 2.2 k
1.07 – 1.55 1.56 – 2.09
55 – 79 80 – 107
AM TUNING <<
12 k 33 k
1.89 – 3.29 3.3 - 4.47
A G
128 – 158 187 – 210
+ 3.3 k + 4.7 k
2.10 – 2.62 2.63 – 3.94
108 – 134 135 – 156
SPEAKERS SPEAKERS
A B
+ 3.3 k + 4.7 k
2.10 – 2.62 2.63 – 3.94
108 – 134 135 – 156
TUNING >> –