Pioneer SX-SW77 Service Manual page 54

1
PCM1803DB (MAIN ASSY : IC3003)
• Single-ended, Analog-input 24-bit, 96-kHz Stereo A/D Converter
A
Pin Arrangement (Top view)
V L 1 20
IN
V R 2 19
IN
V 1 3 18
REF
V 2 4 17
REF
V 5 16
CC
AGND 6 15
PDWN 7 14
BYPAS 8 13
TEST 9 12
B
LRCK 10 11
C
Pin Function
No. Pin Name I/O
1 V L
IN
2 V R
IN
3 V 1
REF
4 V 2
REF
5 V
CC
6 AGND
7
PDWN
D
8 BYPAS
9 TEST
10 LRCK I/O
11 BCK I/O
12 DOUT
13 DGND
14 V
DD
15 SCKI
16 OSR
17 FMT0
18 FMT1
E
19 MODE0
20 MODE1
(1) Schmitt-trigger input
(2) Schmitt-trigger input with internal pulldown (50 kohm typically), 5-V tolerant
(3) Schmitt-trigger input, 5-V tolerant
F
54
1
2
Block Diagram
MODE1
MODE0
FMT1
V L 1
IN
FMT0
OSR
SCKI
V 1
REF 3
V
DD
DGND Reference
DOUT V 2 4
REF
BCK
V R 2
IN
I Analog input, L-channel
I Analog input, R-channel
−
Reference-voltage-1 decoupling capacitor
−
Reference-voltage-2 decoupling capacitor
−
Analog power supply, 5-V
−
Analog GND
I Power-down control, active-low (2)
I HPF bypass control. LOW: Normal mode (dc reject); HIGH: Bypass mode (through)(2)
I Test, must be connected to DGND (2)
Audio data latch enable input/output (1)
Audio data bit clock input/output (1)
O Audio data digital output
−
Digital GND
−
Digital power supply, 3.3-V
I System clock input: 256 f , 384 f
S
Oversampling ratio select input. LOW: ×64 f
I
I Audio data format select input 0 (2)
I Audio data format select input 1 (2)
I Mode select input 0 (2)
I Mode select input 1 (2)
2
3
Delta-Sigma
Modulator
Delta-Sigma
Modulator
Power Supply
5 6 13 14
Pin Function
, 512 f or 768 f (3)
S S S
, HIGH: ×128 f
(2)
S S
SX-SW77
3
4
Serial
Interface
×1/64, ×1/128
Decimation
Filter
with
Mode/
High-Pass Filter
Format
Control
Clock and Timing Control
4
11 BCK
10
LRCK
12 DOUT
17
FMT0
18 FMT1
19
MODE0
20 MODE1
8 BYPAS
9 TEST
16 OSR
7
PDWN
15 SCKI