Yamaha MCR-B043 Service Manual page 46

MCR-B043/MCR-B043D/NS-BP83
Pin
Port Name
No.
82 P06/AN06/D6 CD_SW2
83 P05/AN05/D5
84 P04/AN04/D4
85 P03/AN03/D3 UART_TX_IND
86 P02/AN02/D2 AMP_EN
87 P01/AN01/D1 BT_MFB
88 P00/AN00/D0 LUMI
89 P107/KI3/AN7 PS3_PRT
90 P106/KI2/AN6 DEST
91 P105/KI1/AN5 KEY0
92 P104/KI0/AN4 PS2_PRT
93 P103/AN3 PS1_PRT
94 P102/AN2 KEY2
95 P101/AN1 KEY1
96 Avss AVSS
97 P100/AN0 MODEL
98 Vref VREF
99 Avcc AVCC
100 P97/Sin4/Adtrg FL_N_CS
Model detection for AD port
R189 on MAIN (1) P.C.B.
Detected voltage value
at 97 pin
A/D value (3.3 V = FF)
MODEL
Destination detection for A/D port
Destination (A/D) pull-up resistance 47 k-ohms
R125 on MAIN (1) P.C.B.
Detected voltage value
0 – 0.215 V
at 90 pin
A/D value (3.3 V = FF)
Destination
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
Detected voltage value
0 – 0.150 V
at 91 pin
A/D value (3.3 V = FF)
KEY0
46
I/O
Function Name
(P.C.B.)
O
O
O
AD
AD
AD
AD
AD
MCU
AD
MCU
MCU
0 Ω
0 – 0.215 V 1.568 – 2.034 V
0 – 10
MCR-B043D
0 Ω 1.5 kΩ 3.3 kΩ
0.215 – 0.625 –
0.625 V 1.077 V
00 – 10 11 – 30 31 – 53
U K J
0 Ω +1 kΩ
0.150 – 0.459 V
00 – 0b 0c – 23
(Skip/Search) /
(Eject) PRESET
CD discharge detection
[I] Bluetooth module use to inform microprocessor
Audio amp enable
[O] Bluetooth module's operation signal
PS protection 3 / +7.2V, +5A monitoring
Destination distinction
[AD] Front panel key input discernment
Power supply protection 2 / +3.3D, +5D monitoring
Power supply protection 1 / +VP, +34V monitoring
[AD]
[O] CS for FL / CLOCK Off: Low fixed
10 kΩ
7A – 9d
MCR-B043
6.8 kΩ 12.0 kΩ
1.077 – 1.568 –
1.568 V 2.034 V
54 – 79 7A – 9d
L, V G
+1.3 kΩ +1.6 kΩ
0.771 –
0.459 – 0.771 V
1.365 V
24 – 3b 3c – 69
(Skip/Search) /
PRESET (STOP)
Detail of Function
22.0 kΩ 47 kΩ
2.034 – 2.495 –
3.011 – 3.3 V
2.495 V 3.011 V
9E – c1 c2 – E9 EA – FF
A B T, S, H
+13 kΩ +9 kΩ (22 kΩ)
1.937 –
2.227 – 3.3 V
2.227 V
96 – Ac Ad – FF
SOURCE
(Play/Pause)
open