VSX-516-K
114
1
2
3
4
1
2
3
4
C
D
F
A
B
E
7.3.4 USB Module
7.3.4.1 Block Diagram
LOAD
SW IC
IC701
USB Host
TCC760HC01-AG
1.8V
REG.
IC781
2ch
DAC
3.3V
REG.
Q784
MUTE
Tr
System
Control
CPU
IC953
5
→
3
74AHC08
IC951
3
→
5
74AHCT08
IC762
16M
FLASH ROM
IC703
IC702
IC771
CN701
1
CN702
CN812
15
5
9
10
12
7
11
13
3
1
4
2
14
15
5
9
10
12
7
11
13
3
1
4
2
14
2
3
4
D-
V5USB
D-
D+
GND
I2S
R ch
L ch
DAC_SD
DAC_SCK
TREQ
USDAO
USCLK
HREQ
USDAI
USCS
XRST
TREQ
USDAO
ROUT
To
Analog input
selector
To
USB
connector
LOUT
USCLK
HREQ
USDAI
USCS
XRST
XFLAG
CTL
V+5USB
GNDA
Protection flag
BUS Power cnt.
V+3R3
V+3R3
V+5D
V+5D
V+3R3
IC761
64M
SDRAM
V+3R3
V+1R8
V+1R8
I/O
Internal
Core
DA_CS
XMUTE
D+
USB ASSY
W
POWER PACK
ASSY
C
Main parts
Purpose
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