NXP Semiconductors PCA9957HN-ARD Arduino Shield

The PCA9957HN host device communicates through the Arduino port with the LED driver via the high-speed SPI bus (up to 10MHz clock frequency). The board is equipped with a pair of Fuji connectors that supports an SPI daisy chain scalable architecture. Thus, users can create a stack of similar boards that share the same SPI bus. The Fuji connectors are of the board-to-board type, allowing the user to attach each of the boards in a vertical stack instead of connecting link cables between the boards. Three additional digital lines in the SPI bus allow the motherboard to control the DUT through the Arduino port or the Fuji connectors.

Power is delivered from the motherboard (EVK) through the Arduino port. The power rails are shared with the Fuji connectors so the DUT can be powered either from the Arduino connectors or the Fuji connectors. The board contains four RGB LEDs and twelve white LEDs allocated to all twenty-four outputs of the PCA9957HN DUT. The board also contains jumpers and connectors that allow users to connect external LEDs to the PCA9957HN outputs. Additionally, a Graphical User Interface (Windows platform) is provided to facilitate the evaluation of the daughterboard. The GUI is used in combination with the following NXP evaluation boards: IMXRT1050 EVK Board, LPCXpresso55S69 Development Board, and i.MX 8M Mini LPDDR4 EVK Board.

Note 1: i.MX Mini LPDDR4 EVK Boards require the use of an IMX8MMINI-IARD interposer board between the EVK and PCA9957HN-ARDUINO daughterboard (see IMX8MMINI-IARD User Manual).