I am intending to make a multiplexed LED matrix, possibly with 16 rows, 8 columns. This means maximum 16 LEDs (one full row) will be lit at the same time, thus 16 LEDs * 20 mA/LED = 320 mA.
According to the STM32F103 datasheet I have max 150 mA per GND, see excerpt below:
I use the development board (see pic below) which has 3 GND pins.
I assume I should split my LED 'returns' to 3 different GNDs to have a maximum of 150 mA/GND pin?