Functional Block Diagram - Denon S-81 Service Manual

PCM1754 (IC103 : 1U-3790)
(TOP VIEW)
BCK 1
DATA
2
LRCK
3
DGND 4
NC
5
V
6
CC
V L
7
OUT
V R
8
OUT

FUNCTIONAL BLOCK DIAGRAM

BCK
LRCK
DATA
FMT
MUTE
DEMP
TEST
SCK
16 SCK
AGND
FMT
15
BCK
MUTE
14
DATA
13 DEMP
DEMP
TEST
12
DGND
ZEROA
11
FMT
LRCK
V
10
COM
MUTE
AGND
9
NC
SCK
TEST
V
CC
V
COM
V
OUT
V
OUT
ZEROA
(1)
Schmitt-trigger input with internal pulldown.
Audio
Serial
Port
4x/8x
Oversampling
Digital
Filter
and
Function
Serial
Control
Control
Port
System Clock
System
Clock Zero Detect
Manager
Terminal Functions
TERMINAL
I/O
NAME NO.
9 – Analog ground
1 I Audio-data bit-clock input
2 I Audio-data digital input
13 I De-emphasis control
4 – Digital ground
15 I Data format select
3 I L-channel and R-channel audio data latch enable input
14 I Analog mixing control
5 –
16 I System clock input
12 I Test pin. Ground or open
6 – Analog power supply, 5 V
10 – Common voltage decoupling
L 7 O Analog output for L-channel
R 8 O Analog output for R-channel
11 O Zero flag output for L/R channels
DAC
Enhanced
Multilevel
Delta-Sigma
Modulator
DAC
Power Supply
46
S-81/S-81DAB
DESCRIPTION
(1)
(1)
(1)
(1)
V
Output Amp
OUT
and
Low-Pass Filter
V
COM
Output Amp
and
Low-Pass Filter
V
OUT
L
R