Hardware description UM0284
4/11 Doc ID 12664 Rev 2
1.2 Jumper assignments
Tabl e 1 describes the jumper assignments of the demonstration board.
1.3 Connector assignments
Table 1. Demonstration board jumper assignments
Jumper
Related
pin(s)
Description
J1 D+
Connected: connects a 1.5 kΩ pull-up resistor to the D+ data line. Must be
connected in full-speed mode when R
SEL
= 0
Leave open when in low-speed mode.
J2 D-
Connected: connects a 1.5 kΩ pull-up resistor to the D- data line. Must be
connected in low-speed mode.
Leave open when in full-speed mode.
J3 V
BUS
1-2 connected: selects CN1 connector as 5 V V
BUS
voltage source.
2-3 connected: 5 V V
BUS
voltage is supplied by CN3 USB connector
J4 SPD
1-2 connected: STUSB03E transceiver in low-speed mode
(1)
2-3 connected: STUSB03E transceiver in full-speed mode
1. Leave this jumper open when controlling this function using an external USB controller connected to CN2.
J5
CON,
RSEL,
SPD, V
PU
1-2 connected: V
PU
pin in high impedance; data line pull-up resistor
disconnected
(1)
2-3 connected: V
PU
pin outputs 3.3 V ±10% (data line pull-up resistor
connected to internal LDO regulator output) when SPD = 1 and RSEL = 0 or
when SPD = 0
J6 SUS
1-2 connected: STUSB03E transceiver active
(1)
2-3 connected: STUSB03E transceiver in suspend mode
J7 RSEL
1-2 connected: internal FS pull-up resistor disabled
2-3 connected: internal FS pull-up resistor enabled
J8 OE#
1-2 connected: STUSB03E transceiver in transmit mode
(1)
2-3 connected: STUSB03E transceiver in receive mode
J9 V
BUSDET
Connected: enables the V
BUS
voltage detection LED. LED switches ON
when voltage greater than the V
BUSDET
threshold is detected.
Table 2. Demonstration board connectors
Connector Descriptions
CN1 Power supply: V
BUS
, V
IF
and GND. Refer toTa bl e 3 for pin assignments.
CN2
Header connector for USB controller connection. Refer to Tabl e 4 for USB
controller connections.
CN3 USB mini-B connector.
