JVC RX-8012PSL Service Manual page 20

RX-8012PSL
PCM2702E-X (IC410) : USB D/A converter
1.Pin layout
XTI
1
XTO 28
V C
2
DD
VccP 27
3 DGNDC
AGNDP 26
4 V
DD
VccL 25
DGND
5
AGNDL 24
D+
6
V L 23
OUT
7 D-
Vcc 22
8 V
BUS
V 21
COM
DGND
9
AGND 20
PLYBCK
10
V R 19
OUT
11 SSPND
AGNDR 18
12 ZERO
VccR 17
TEST3
13
TEST0 16
14 TEST2
TEST1 15
3.Pin function
Pin No. Symbol
1 XTI
2 V C
DD
3 DGNDC
4 V
DD
5 DGND
6 D+
7 D-
8 V
BUS
9 DGNDU
10 PLYBCK
11 SSPND
12 ZERO
13 TEST3
14 TEST2
15 TEST1
16 TEST0
17 VccR
18 AGNDR
19 V R
OUT
20 AGND
21 V
COM
22 Vcc
23 V L
OUT
24 AGNDL
25 VccL
26 AGNDP
27 VccP
28 XTO
Note:
(1) 3.3V tolerant.
(2) Schmitt trigger input with internal pull-down, 5V tolerant.
1-20
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2. Block diagram
USB packet
data
D+
WRCLK
D-
USB I/F
VBUS
DGNDU
MCLK
VDDC
USB clock
DGNDC
generator
Crystal OSC
XTI
XTO
I/O
IN Crystal Oscillator Input.
- Digital Power Supply for Clock Generator, +3.3V.
- Digital Ground for Clock Generator.
- Digital Power Supply, +3.3V.
- Digital Ground.
I/O USB Differential Input/Output Plus.
I/O USB Differential Input/Output Minus.
IN USB Bus Power (This pin NEVER consumes the USB bus power).
- Digital Ground for USB Transceiver.
OUT Playback flag, active LOW. (LOW: playback, HIGH: idle).
OUT Suspend flag, active LOW. (LOW: suspend, HIGH: operational).
OUT Zero flag, (LOW: Normal, HIGH: ZERO).
IN Test pin 3. Connect to digital ground.
IN Test pin 2. Connect to digital ground.
IN Test pin 1. Connect to digital ground.
IN Test pin 0. Connect to digital ground.
- Analog Supply for R-channel, +5V.
- Analog Ground for R-channel.
OUT Analog Output for R-channel.
- Analog Ground.
- Common for DAC.
- Analog Supply, +5V.
OUT Analog output for L-channel.
- Analog Ground for L-channel.
- Analog Supply for L-channel, +5V.
- Analog Ground for PLL.
- Analog Supply for PLL, +5V.
OUT Crystal Oscillator Output.
audio
data
FIFO
8x
Multi-level
Oversampling
Delta-Sigma
Digital Filter
Modulator
RDCLK
System Clock
Audio clock
SPACT
generator
VDDP DGNDP
Function
Low-pass
DAC
Filter
Low-pass
DAC
Filter
Power supply
VCC AGND VDD DGND
(1)
(2)
(2)
(2)
(2)
(2)
VOUTL
VCOM
VOUTR