UBX-21008123 - R02
Board configuration
Page 22 of 42
C1-Public
Raspberry Pi HAT
When connecting a HAT to the Raspberry Pi interface, the following jumper configuration can be used
as shown in Figure 12. Depending on how the ANNA module is to communicate with a test PC over
USB or with the HAT, the
VDD_MCU
net could be left unpowered.
⚠
The
3V3_PI
supply net must only be powered when connecting to a Raspberry Pi expansion board
(HAT). If connecting to a Raspberry Pi board, the jumper must be disconnected.
Figure 12: Jumper configuration when connected to a Raspberry Pi HAT (dashed lines show optional jumpers)
Connector
Add jumper to pins
Description
J7
1, 2
Connects the 3V3_PI net to the regulated 3.3 V supply.
7, 8
Selects the board regulated 3.3 V net as a source for the VCC_ANNA net.
9, 10
(Optional) Powers up the Interface MCU, USB hub, and UART to USB converter with 3.3 V.
J22
1, 3
Powers up the ANNA module. The ANNA VCC and VCC_IO pins are connected to the
selected source for the VCC_ANNA net.
2, 4
(Optional) Powers up the peripherals directly connected to ANNA such as LEDs and
external memory with the ANNA supply voltage.
Table 7: Jumper configuration when connected to a Raspberry Pi HAT
J7
B
OA
R
D
R
A
SP
_P
I_3
V
3
3
4
2
1
J22
VCC_IO
VCC_IO
VCC_ANNA
VCC
1
2
9
10
ANNA module power
board I/O power
(optional)
J22: 2-4
J22: 1-3
PC communication
(optional)
MCU
J7: 9-10
ANNA
7
8
DC/DC
EVB powered
J7: 7-8
HAT
Raspberry Pi
expansion board
J7: 1-2
3V
3
3V
3
3V
3
