Denon S-81 - Page 36

36
S-81/S-81DAB
Pin No. Symbol I/O Function Description Remarks
55 ZDET
O
3-5I/F
1 bit DA converter zero data detection flag output pin. ˇ
56 V
SS5
ˇ Microcontroller interface GND pin. ˇ
57 BUS0
58 B US1
59 B US2
60 BUS3
I/O
3-5I/F
Microcontroller interface data I/O pins.
Schmitt input
CMOS ports
61 BUCK
I
3-5I/F
Microcontroller interface clock input pin. Schmitt input
62 / CCE
I
3-5I/F
Microcontroller interface chip enable signal input pin. At “L”,
BUS0 to BUS3 are active.
Schmitt input
63 / RST
I
3-5I/F
Reset signal input pin. At reset, “L”. Built-in pull-up resistor
64 V
DD5
ˇ Microcontroller interface 5 V power supply pin. ˇ
38 S EL
O
AI/F
APC circuit ON/OFF signal output pin. At laser on, high
impedance with UHS ı “L”, H output with UHS ı “H”.
3-state output
39 AV
DD3
ˇ Analog 3.3 V power supply voltage pin. ˇ
40 FMO
O
AI/F
Feed equalizer output pin.
41 DMO
O
AI/F
Disc equalizer output pin.
3-state output
(PWM carrier ı 88.2 kHz)
(AV
DD3
,V
REF
,AV
SS3
)
42 V
SS3
ˇ Digital GND pin.
43 V
DD3
ˇ Digital 3.3 V power supply voltage pin.
44 TESIN
I
3I/F
Test input pin. Normally, fixed to “L”.
45 XV
SS3
ˇ System clock oscillator GND pin.
46 X I
I
AI/F
System clock oscillator input pin.
47 XO
O
AI/F
System clock oscillator output pin.
48 XV
DD3
ˇ System clock oscillator 3.3 V power supply voltage pin.
49 DV
SS3
ˇ DA converter GND pin.
50 RO
O
AI/F
R-channel data forward output pin.
51 DV
DD3
ˇ DA converter 3.3 V power supply pin.
52 DV R ˇ Reference voltage pin.
53 LO
O
AI/F
L-channel data forward output pin.
54 DV
SS3
ˇ DA converter GND pin. ˇ
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