UM-PM-029
DA9213, DA9214, and DA9215 Performance
Boards
User Manual
Revision 2.0
25-Feb-2022
CFR0012
25 of 37
© 2022 Renesas Electronics
There is another means of controlling the output voltage of the buck converter by using one of the
GPIO ports available on the device.
This example uses GPI4 in the
VBUCK_GPI
field of
BUCKA_CONT
register. GPIO4 is already
selected as the input port active high in the related registers as shown in
Figure 18: GPIO Port Voltage Control
Simply change the connection of red jumper (highlighted by the red circle in
) which is
reflected into a change of the output voltage of BUCKA between VBUCKA_CTRL_A and
VBUCKA_CTRL_B. So the BUCK_SEL bit functionality has been replaced by the GPI4 input port.
The same procedure can be applied to the
BUCK_GPI
field, which selects a GPIO to implement the
buck enable/disable functionality. By changing the connection of the selected GPIO the buck
converter can be seen to enable and disable.
Figure 19: Port Control of the Buck Output Voltage
