Pioneer VSX-2016AV-S Service Manual page 229

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QQ
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Block Diagram of the USB Assy
CN701
V5USB
To
D-
USB
connector
D+
GND
TE
L 13942296513
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AL
USB ASSY
IC771
LOAD
SW IC
V+3R3 V+1R8
Internal
I/O
Core
1
IC701
D-
USB Host
2
D+
TCC760HC01-AG
3
4
V+3R3 V+3R3
IC761
64M
SDRAM FLASH ROM
Main parts
TCC760HC01-AG : USB Host control decoder (MP3/WMA/MPEG-4AAC)
16M FLASH ROM : Firmware is stored
64M SDRAM : Temporary storage area of decoding music file
LOAD SWITCH : Current limitation to USB device power
2ch DAC : D/A converter for analog output
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y
i
http://www.xiaoyu163.com
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8
V+5D
V+1R8 V+3R3
IC702 IC703
1.8V
3.3V
REG. REG.
BUS Power cnt.
Protection flag
XRST
USCS
IC953
USDAI
5 → 3
HREQ
USCLK
IC951
USDAO
3 → 5
TREQ
XMUTE
DA_CS
IC781
DAC_SCK
L ch
Q784
2ch
DAC_SD
MUTE
R ch
I2S DAC
Q Q
3 6 7 1 3
IC762
16M
Purpose
u163
.
VSX-2016AV-S
6
7
2 9 9 4 2 8
A
AUDIO IN
ASSY
CN702 CN516
V+5USB
V+5D
4 4
GNDA
2 2
CTL
14 14
XFLAG
15 15
XRST
5 5
USCS
System
9 9
USDAI
Control
10 10
HREQ
CPU
12 12
USCLK
7 7
USDAO
11 11
TREQ
13 13
LOUT
3 3 To
Analog input
ROUT
Tr 1 1
selector
1 5 0 5 8 2 9 9 4
m
co
7
8
9 9
A
B
C
2 8 9 9
D
E
F
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