4. The host can then decide to repeat the process (back to step 2) or send commands to shutdown the
BQ79631EVM and return later.
3.1 Single Board
A single BQ79631EVM can be used to obtain the measurements outlined in Key Features. Communications
when only using a single board are handled via the UART host interface. This can be accessed on the EVM via
the J10 USB2ANY connection at the top of the board. The daisy chain communications bus would remain
unused as no other EVM boards are present in this configuration.
3.2 Stacked Systems
It is also possible to use the BQ79631EVM in a system of other BQ devices. If the user wishes test the
BQ79631EVM in a system of other BQ79631EVMs, this is possible through use of the daisy chain
communications bus. If using both the BQ79631EVM and a stack of BQ79616EVMs simultaneously, it is
recommended to configure the BQ79631EVM as the bridge device by connecting it to the host microcontroller
via the UART host interface and then using the daisy chain communications bus in order to connect the
BQ79631EVM to the stack of BQ79616EVM devices. This configuration is shown in the figure below.
Theory of Operation
SLUUCC3 – FEBRUARY 2021
BQ79631EVM Evaluation Module
9
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