T
T
T
S
S
S
-
-
-
R
R
R
D
D
D
P
P
P
8
8
8
USB2.0 Portable Multi-Card Reader
Transcend Information, Inc.
2
USB Pinouts
Pin No.
Pin Name
01
V
USB
02
USB-
03
USB+
04
NC
05
VSS
USB Pin Identification
Symbol
Function
USB-
USB+
USB differential signal:
The pairs are used to transmit
Data/Address/Command
VSS
Ground
V
USB
USB Power Input
NC
Not Connect
Block Diagram
USB
Port
4 slots:
SD/MMC
CF
MS/MS Duo
MicroSD/M2
12MHz
CRYSTAL
3.3/1.8V
Voltage
Regulator
V
USB
Controller
V
DD18
V
OUT
V
DDHM
3.3V
Power
Switch
V
DDH
