EVK-ANNA-B112 - User Guide
UBX-18018539 - R01
Product description
Page 14 of 29
Note on SCL/SDA: On some Arduino boards, the I
2
C signals, SCL, and SDA are connected to the pins
A4 and A5 and to the SCL and SDA pins in the top right hand corner. Since these pins will be shorted
together it might cause problems when connected to the EVK-ANNA-B112, which has not shorted
these pins together.
Note on digital I/O pins: Some of the digital I/O pins can be connected to the on-board debug MCU,
thus allowing serial communication and flashing/debugging over USB. This can cause interference
on the signals that are also used by an Arduino shield. See section 1.10 on how to disconnect these
signals from the debug MCU.
1.8
Raspberry Pi compatible interface
The EVK-ANNA-B112 includes a 40-pin IO header that can be used to interface with either a
Raspberry Pi computer board or with a Raspberry Pi expansion board (HAT). The EVK-ANNA-B112
uses different hardware and software configurations depending on if it is connected to a Pi or a HAT;
the differences are covered in this section. The default configuration is to connect to a Pi.
Not all the Raspberry Pi versions and HATs are supported, since it requires the 40-pin IO header,
which older versions did not have. Table 9 lists the compatible Raspberry Pi versions.
Compatible Raspberry Pi boards
Raspberry Pi 1 Model A+
Raspberry Pi 1 Model B+
Raspberry Pi 2 Model B
Raspberry Pi 3 Model B
Raspberry Pi Zero
Raspberry Pi Zero W
Table 9: Compatible Raspberry Pi boards
Figure 14: Pin header J14 that is compatible with the Raspberry Pi IO connectors
