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Yamaha A-S2100 Service Manual page 47

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Pin
Port Name
No.
77 P1_3/TXD6/SDA6/D11
78 P1_2/RXD6/SCL6/D10
79 P1_1/CLK6/D9
80 P1_0/nCTS6/nRTS6/D8
81 P0_7/AN0_7/D7
82 P0_6/AN0_6/D6
83 P0_5/AN0_5/D5
84 P0_4/AN0_4/D4
85 P0_3/AN0_3/D3
86 P0_2/AN0_2/D2
87 P0_1/AN0_1/D1
88 P0_0/AN0_0/D0
89 P10_7/AN7/nKI3
90 P10_6/AN6/nKI2
91 P10_5/AN5/nKI1
92 P10_4/AN4/nKI0
93 P10_3/AN3
94 P10_2/AN2
95 P10_1/AN1
96 Avss
97 P10_0/AN0
98 Vref
99 Avcc
100 P9_7/nADTRG/SIN4
I/O
Function Name
(P.C.B.)
EX_DO
SO
O
EX_DI
SI
O
EX_CL
SO
O
EX_N_CS
O
O
EX_N_IC
O
O
I_MTRCON
AD
O
SW_TRE
O
O
SW_BASS
O
O
PRV
AD
O
DEST
AD
O
MODEL
AD
O
EXAD
AD
O
4051C
O
O
4051B
O
O
4051A
O
O
N_MT_LEV_DET
I
O
N_HP_DET
I
O
MVOL+
O
O
MVOL-
O
O
MG
[MCU]
LED_PWR
O
O
VREF
[MCU]
AVCC
[MCU]
STBY_CNT
O
O
Detail of Function
O
Expanded IC: Data Out for LC709004A
O
Expanded IC: Data In for LC709004A
O
Expanded IC: Clock for LC709004A
O
Expanded IC: Chip Select for LC709004A
O
Expanded IC: Initial Clear for LC709004A
O
Meter Control SW AD value detect
Info Meter control: Meter control rotary switch position is transmitted
To have the switch position grasped using the mobile terminal application,
it is necessary to send the information to the microprocessor
O
TREBLE cut off frequency select
Selected with the TONE CONTROL value
O
BASS cut off frequency select
Selected with the TONE CONTROL value
O
Power failure other than Power Amp detect
O
Discrimination of destination
O
Discrimination of model
O
AD MUX: COM input of TC74HC4051AFEL
Expanded IC for AD: TC74HC4051AFEL
O
AD MUX select
Expanded IC for AD: TC74HC4051AFEL
O
AD MUX select
Expanded IC for AD: TC74HC4051AFEL
O
AD MUX select
Expanded IC for AD: TC74HC4051AFEL
O
MUTE LEVER detect
Hi: MUTE On, Low: MUTE Off
O
Headphone detect
Hi: No headphone, Low: Headphone inserted
O
Motor driver IC control
O
Motor driver IC control
D_GND
O
POWER LED control
Hi: LED On, Low: LED Off
+5M
+5M
O
• +5SPC power ON/OFF control
Hi: ON, Low: OFF, To save stand-by power
• Usually fixed at Hi setting when the power is turned on
By setting to Low after processes required for stand-by are finished,
the stand-by power is reduced (MCUSleep)
When shifting to Stand-by state,
set to Low after the end procedure is completed
A-S2100
in the AD value
47

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