Yamaha R-N500 Service Manual page 49

I/O
Pin Function Name
Port Name
No. (P.C.B.)
104 P0_7 DAC_N_CS O O O
105 P0_6 NCPU_AMUTE I O O
106 AN0_5 PS3_PRT AD
107 AN0_4 PS2_PRT AD
108 AN0_3 (reserve) AD
109 AN0_2 USB_VBUS_PRT AD I I
110 AN0_1 THM3 AD I I
111 AN0_0 DEST AD I I
112 P11_7 NCPU_N_RST O O O
113 P11_6 DIR_SDO I I O
114 P11_5 DIR_WCK I I O
115 P11_4 TUNI2C_ON O O O
116 P11_3 VO_N_MT O O O
117 P11_2 VSEL3 O O O
118 P11_1 VSEL2 O O O
119 P11_0 VSEL1 O O O
120 AN7 DC_PRT AD I I
121 AN6 AMP_OLV AD I I
122 AN5 THM1 AD I I
123 AN4 THM2 AD I I
124 AN3 KEY2 AD I I
125 AN2 KEY1 AD I I
126 AN1 PS1_PRT AD I I
127 AVSS AVSS MCU MCU MCU
128 P10_0 (no_use) O O O
FULL ON : During normal operation
POWER OFF : During transition from normal operation to standby state
MCU SLEEP : Standby state
AC OFF : During transition from normal operation to AC off
Key detection for A/D port
Key input (A/D) pull-up resistance: 10 k-ohms
0 Ω +1 kΩ +1 kΩ
Detected voltage value
0 – 0.14 V 0.16 – 0.41 V 0.43 – 0.7 V
at 125 pin
A/D value
000 – 011 012 – 032 033 – 054
(3.3 V=255)
KEY1 ENTER RETURN TUNING
0 Ω +1 kΩ +1 kΩ
Detected voltage value
0 – 0.14 V 0.16 – 0.41 V 0.43 – 0.7 V
at 124 pin
A/D value
000 – 011 012 – 032 033 – 054
(3.3 V=255)
KEY2 CLEAR MEMORY DISPLAY
Destination detection for A/D port
Pull-up resistance: 10 k-ohms
R5418
0 Ω 1.2 kΩ 2.7 kΩ
on OPERATION (2) P.C.B.
Detected voltage value
0 – 0.16 V 0.17 – 0.51 V 0.52 – 0.85 V
at 111 pin
A/D value
000 – 012 013 – 039 040 – 066
(3.3 V=255)
DEST U C
Detail of Function
O DAC chip select
O NET audio mute demand
PS protection detection 3
PS protection detection 2
AD spare
I USB iPad power supply feedback
I
Temperature detection 3 / near diode bridge heat sinking plate (NTC
thermister) of MAIN P.C.B.
I Model distinction
O
I DIR_SDO input for CDDA writing
I DIR_WCK input for CDDA writing
O (reserved) / I2C switching to Tuner
O Composite video selector mute
O Select of video input
O Select of video input
O Select of video input
I Power amplifier DC detection
I Power amplifier output level detection
I Temperature detection 1
I
I KEY AD value uptake 2
I KEY AD value uptake 1
I PS protection detection 1
MCU Microprocessor ground
O AD spare
+1.5 kΩ +1.8 kΩ +2.2 kΩ +3.3 kΩ +4.7 kΩ
0.71 – 1 V 1.01 – 1.27 V 1.28 – 1.55 V 1.57 – 1.85 V 1.86 – 2.14 V
055 – 077 078 – 098 099 – 120 121 – 143 144 – 165
TUNING AM FM PRESET PRESET
+1.5 kΩ +1.8 kΩ +2.2 kΩ
0.71 – 1 V 1.01 – 1.27 V 1.28 – 1.55 V
055 – 077 078 – 098 099 – 120
DIMMER SPEAKERS A SPEAKERS B
4.7 kΩ 6.8 kΩ 10 kΩ 15 kΩ 47 kΩ
0.86 – 1.18 V 1.19 – 1.48 V 1.49 – 1.80 V 1.81 – 2.20 V 2.58 – 2.87 V
067 – 091 092 – 114 115 – 139 140 – 170 199 – 222
R, S K A B, G
100 kΩ
2.88 – 3.16 V
223 – 244
L
R-N500
49