Usb Module - Pioneer VSX916 Service Manual

1

7.3.4 USB Module

7.3.4.1 Block Diagram
A
W
V+3R3
B
CN701
V5USB
1
To
D-
D-
2
USB
D+
connector
D+
3
GND
4
C
V+3R3
Main parts
TCC760HC01-AG
16M FLASH ROM
64M SDRAM
LOAD SWITCH
D
2ch DAC
E
F
132
1
2
USB ASSY
IC771
LOAD
SW IC
V+1R8
IC702
1.8V
REG.
BUS Power cnt.
V+1R8
Protection flag
XRST
Internal
I/O
USCS
Core
USDAI
HREQ
USCLK
IC701
USDAO
USB Host
TREQ
TCC760HC01-AG
XMUTE
DA_CS
DAC_SCK
DAC_SD
I2S
V+3R3
IC761 IC762
64M 16M
SDRAM FLASH ROM
Purpose
: USB Host control decoder (MP3/WMA/MPEG-4AAC)
: Firmware is stored
: Temporary storage area of decoding music file
: Current limitation to USB device power
: D/A converter for analog output
VSX-816-K
2
3
V+5D
CN702
4
V+3R3
IC703
3.3V 2
REG.
14
15
5
IC953
9
5 → 3
10
74AHC08
12
IC951
7
3 → 5
11
74AHCT08
13
IC781
L ch
Q784
3
2ch
MUTE
DAC R ch
Tr
1
BETO-PX
3
4
C
POWER PACK
ASSY
CN812
V+5USB
V+5D
4
GNDA
2
CTL
14
XFLAG
15
XRST
5
USCS
System
9
USDAI
Control
10
HREQ
CPU
12
USCLK
7
USDAO
11
TREQ
13
LOUT
To
3
Analog input
ROUT
1
selector
4