NXP Semiconductors
UM11761
PCA9955BTW-ARD evaluation board
•
Connecting an USB cable from the PC to the Micro-B USB connector (J9) on the board
•
Connecting an USB cable from the PC to the USB connector (J28) on the board. When
the PC is connected in this fashion, the USB port can simultaneously act as a debug
interface. Therefore, by using a single USB cable connected to J28, the EVK can be
powered and at the same time linked to the PC for data exchange.
The older USB ports (from PC) are not able to deliver the necessary current (500mA),
before establishing the communication, use an external power supply (connected to J2).
From J1 on the EVK board (see
) the user can select the power configuration
for the motherboard. For further details, see the
i.MX RT1050 Processor Reference
Figure 5. PCA9955BTW-ARD daughterboard and IMXRT1050 EVK board, before starting
To configure the hardware and workstation, complete the following procedure:
1. Configure the suitable power configuration of EVK (J1). If using J28 for power supply,
the J1 jumper shall be placed in position 5-6. If using an external power supply
(connected to J2), the jumper J1 will be placed in position 1-2.
2. Insert the PCA9955BTW-ARD daughterboard on the Arduino connector of the EVK
).
3. Using USB connector J28, connect the EVK board to an USB port of the computer.
4. Install the IMXRT1050 target firmware (download from NXP site and see UM11581,
Arduino
Arduino shields GUI and firmware installation manual
for step-by-step
instructions).
5. Install GUI application (see
UM11581, Arduino shields GUI and firmware installation
6. Open the GUI application to operate the device from the PC. For details regarding
GUI operation see
.
shows the boards during the operation.
UM11761
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© NXP B.V. 2022. All rights reserved.
User manual
Rev. 1.0 — 18 March 2022
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