BOS1211-KIT CONFIDENTIAL
User Guide –Preliminary
BT002BDK01.05 –Issue 5 © All rights reserved 2020 Boréas Technologies Inc 9
4.4 BOS1211-KIT-BRD-C Other Hardware
The controller board has additional hardware features to expand the board functionally when testing
actuators and building prototypes. These features are described in this section.
4.4.1 Probe Hooks
Probe hooks have been inserted around the board to ease connection of instruments for measurement
of supplies when debugging.
4.4.2 Expansion Port
An expansion port is available to provide test point access to the SPI I/Os. This port is labeled TPSPI in
the BOS1211-KIT-BRD-C schematics. It is initially unpopulated but can be using a Sullins Connector
Solutions model number SBH11-NBPC-D12-SM-BK or equivalent.
4.4.3 GPIO
General-purpose inputs and outputs are provided to easier integration of the development kit in a
prototype. For example, digital inputs may be used as trigger inputs to fire the waveforms or to send
information from the system to the development kit.
Using these GPIOs implies to modify the firmware to support them. However, they are already physically
implemented and routed to the MCU. They only need to be activated in the firmware software code
project.
There are 8 inputs and 8 outputs available on header connectors at the bottom of the board. A jumper
is initially shorting VIO-IN and VIO-OUT with the board 3.3 V pin so they are referenced to the board
main 3.3 V supply. To use an external supply, remove the jumpers and connect the external voltage
supply to the VIO-IN and VIO-OUT pins. The external supply must be in the 1.65 to 5.5 V range. VIO-IN
and VIO-OUT may have different supply levels.
Refer to the board schematics in section 7.1 for MCU pins numbers corresponding to the inputs and
outputs used.
4.4.4 ADC and DAC Connections
One DAC and four ADC pins are made available to the user. These connections are buffered to protect
the controller board. These signals cannot exceed the board 3.3 V supply level.
Using these implies to modify the firmware to support them. However, they are already physically
implemented and routed to the MCU. They need to be activated in the firmware software code project.
4.4.5 External SPI Master
All BOS1211 actuator driver chips are controlled via the SPI interface using the PSoC6 MCU as master. It
is, however, possible to bypass the MCU and use an external SPI master. This can be useful when trying
to connect the BOS1211 ICs directly to an external system.
SCK, MISO and MOSI connections are shared by all BOS1211 on the driver boards. Three chip selects
(CSA, CSB and CSC) are required to access the chip select pin on each BOS1211 in the slots A, B and C.
By default, a jumper on 5 V and VSPI forces the internal 5 V supply to be used. To use an external voltage
domain, remove this jumper and connect VSPI to the external supply.
