EVK-ANNA-B112 - User Guide
UBX-18018539 - R01
Product description
Page 12 of 29
Connector
annotation
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 VDD_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 VDD_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
1.7
Arduino interface
The EVK-ANNA-B112 includes a set of pin headers and mounting holes that are compatible with
certain Arduino or Arduino inspired shields. Figure 13 shows the layout of the Arduino interface and
Table 8 explains the pinout in more detail. Section 1.7.1 describes what specifications must be met
for a shield to be compatible for use with the EVK-ANNA-B112.
☞
The silk screen text on EVB marked UBXH60-0000474 J3 pin 6 shall be IO_31.
Figure 13: Pin headers that are compatible with some Arduino shields
Conn. Pin
No.
Arduino
pin
Description
Schematic
net name
nRF52
pin
u-blox connectivity and alternate
functions with notes
J1
1
N/C
Not Connected
-
-
Not connected
2
IOREF
I/O reference voltage level.
Selectable by user to 1.7 – 3.6 V
VDD_IO
-
See section 1.6
3
RESET
Reset signal input. Active low logic
RESET_N
P0.21
4
3.3V
3.3 V DC regulated supply output
3V3
-
5
5V
5 V regulated supply output
5V
-
Cannot be used as supply input, use
VIN instead. Only supplied by USB
VBUS.
6
GND
Ground
GND
GND
7
GND
Ground
GND
GND
8
VIN
External DC supply input, 5 – 12 VDC VIN
-
