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Yamaha A-S2100 Service Manual page 46

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A-S2100
Pin
Port Name
No.
39 P5_7/nRDY/CLKOUT
40 P5_6/ALE
41 P5_5/nHOLD
42 P5_4/nHLDA
43 P5_3/BCLK
44 P5_2/nRD
45 P5_1/nWRH/nBHE
46 P5_0/nWRL/nWR
47 P4_7/PWM1/TXD7/SDA7/nCS3
48 P4_6/PWM0/RXD7/SCL7/nCS2
49 P4_5/CLK7/nCS1
50 P4_4/nCTS7/nRTS7/nCS0
51 P4_3/A19
52 P4_2/A18
53 P4_1/A17
54 P4_0/A16
55 P3_7/A15
56 P3_6/A14
57 P3_5/A13
58 P3_4/A12
59 P3_3/A11
60 P3_2/A10
61 P3_1/A9
62 Vcc2
63 P3_0/A8
64 Vss
65 P2_7/AN2_7/A7
66 P2_6/AN2_6/A6
67 P2_5/INT7/AN2_5/A5
68 P2_4/INT6/AN2_4/A4
69 P2_3/AN2_3/A3
70 P2_2/AN2_2/A2
71 P2_1/AN2_1/A1
72 P2_0/AN2_0/A0
73 P1_7/nINT5/IDU/D15
74 P1_6/nINT4/IDW/D14
75 P1_5/INT3/IDV/D13
76 P1_4/D12
46
I/O
Function Name
(P.C.B.)
I
O
BALG_DET
I
O
N_EMP
I
MMMC_DET
I
O
MT_N_MAIN
O
O
MT_N_REC
O
O
MT_N_PRE
O
O
/CE
I
NC
O
O
NC
O
O
RYCB1_PLTY
O
O
RY_TCBYP
O
O
RY_MMMC
O
O
RY_BALGAIN
O
O
RY_SEL_BAL
O
O
RY_PHONO
O
O
RY_MDIR
O
O
RY_LINE2
O
O
RY_LINE1
O
O
RY_CD
O
O
VCC2
[MCU]
RY_TU
O
O
VSS
[MCU]
PRDL
AD
O
PRDR
AD
O
NC
O
O
TRIGGER IN
IRQ
IRQ
PRTHL
AD
O
PRTHR
AD
O
HPPRDL
AD
O
HPPRDR
AD
O
PRI_L
IRQ
O
PRI_R
IRQ
O
PWR_DET
IRQ
IRQ
RY_PWR
O
O
Detail of Function
O
O
BALANCE gain select SW detect
Hi=ATT. -6dB (Low Gain), Low=BYPASS (High Gain)
For writing Flash (LO)
Boot mode: P5_5=L, CNVSS=H, P5_0=H
PullDown as the Hiz state may occur during emulator operation
O
PHONO MM/MC SW detect
Hi: MC, Low: MM
O
MAIN MUTE control
Hi: Mute released, Low: Mute On
O
RECOUT MUTE control
Hi: Mute released, Low: Mute On
O
PREOUT MUTE control
Hi: Mute released, Low: Mute On
For writing Flash (Hi)
Boot mode: P5_5=L, CNVSS=H, P5_0=H
O
O
O
BAL Polarity switched between Hi and Low
Hi: INV., Low: NORMAL
O
TONE CONTROL bypass path switching relay control
Hi: Tone Cont Bypass, Low: Tone Cont Enable
O
PHONO MM/MC relay control
Hi: MM, Low: MC
O
BALANCE Gain switching relay control
Hi: ATT.>-6dB (Low Gain), Low: BYPASS (High Gain)
O
BALANCE signal select relay control
Hi: Other than BALANCE, Low: BALANCE
O
PHONO input select relay control
O
MAIN DIRECT input select relay control
O
LINE2 input select relay control
O
LINE1 input select relay control
O
CD input select relay control
+5M
O
TUNER input select relay control
D_GND
O
Lch POWER AMP DC Protect AD value taken in
O
Rch POWER AMP DC Protect AD value taken in
O
O
TRIGGER IN interrupt detect
The power operation is linked by the trigger input from AV AMP
O
Lch heat sink temperature detect
O
Rch heat sink temperature detect
O
HEADPHONE AMP Lch DC protection detect
O
HEADPHONE AMP Rch DC protection detect
O
Lch POWER AMP I Protect AD value taken in
O
Rch POWER AMP I Protect AD value taken in
IRQ
POWER DETECT interrupt detect
O
POWER relay control

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