AVR1014
9
8296A-AVR-03/10
2.4 Jumpers
Refer to component floorplan for the location of the jumpers.
Table 2-2.
Jumpers and their function.
J11
Selects voltage source UVCC (Power supply for USB stage)
When working at Vcc 2.7V-3.3V, the user can keep USB functional by
selecting power supply for USB coming from VBUS rather than from
Vcc.
J19 open – UVCC not connected, USB bridge not usable
J19 pin 1 & 2 connected – UVCC connected to Vcc coming from Power
board (default configuration)
J19 pin 2 & 3 connected – UVCC connected to Vbus coming from USB
line
(See picture below)
Figure 2-8.
J11: USB Power supply selection
2.5 Headers
Table 2-3.
MC303 device board J13 Hall sensors header description.
Pin
Located
Name
Direction
Description
1
J13p1 VCC -
Regulated power Vcc (3.3V/5V) coming from
power board
2 J13p2
H1
Hall sensor output 1
3 J13p3
H2
Hall sensor output 2
4 J13p4
H3
Hall sensor output 3
5 J13p5
GND
-
System ground (Vin/VCC)
J11 : USB power
supply selection
