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T
T
T
S
S
S
0
0
0
M
M
M
H
H
H
D
D
D
E
E
E
N
N
N
C
C
C
Portable Hard Disk Enclosure
Transcend Information Inc.
2
Block Diagram
Control signal
USB IDE
Interface
Controller
USB Connector
D0~D15
/WE
/RE
HDD
...
USB-
USB+
D0~D15
Pinouts
Pin No. Pin Name
01 VCC
02 USB-
03 USB+
04 VSS
Crystal
12MHz
Pin Identification
Symbol Function
USB-
USB+
USB differential signal:
The pairs are used to transmit
Data/Address/Command
VSS
Ground
VCC
USB power input