Wireless MCUのトピックRe: Using QN908x Development kit to program external QN9080 device

Using QN908x Development kit to program external QN9080 device

DeeY — Thu, 22 Jun 2023 09:02:34 GMT

Dear experts,

When making a QN9080 application system, I understand that the "external target debug interface" on the QN9080-DK board can be used for the debugging of the external device.

And there are quite many ports on the external target debug interface, mostly for SWD and JTAG communication. I will connect pin 2 and pin 4 of the interface to PA22 and PA23 of the external QN908x, and the ISPEN (pin 9) to pin 33 (CHIPMODE/PB02) of the external device.

And, should I leave the other pins (pin 1, 6, 8, 9, 10 of the external target debug interface) as floating pins?

What is the role of pin 1 (connected to somewhere invisible), and pin 6 (if_detect)?

Thank you for reading it.

Best regards, DY.

Re: Using QN908x Development kit to program external QN9080 device

Julián_AragónM — Fri, 23 Jun 2023 18:45:52 GMT

Hi @DeeY,

In order to program an off-board target, these jumper configurations are needed (Section 3.1.2 CMSIS-DAP to off-board target, QN908x DK User Guide

Pin 1 is connected to VCC depending on JP2 configuration:

Pin 9 (IF_DETECTED) is connected directly into LPC4322:

This schematic is located in QN9080DK's page, in the section of Design Resources (Design files for QN9080-DK).

As for design and connections, please help me looking into Design Considerations for Debug. I hope you find this helpful!

Best regards,
Julián

Re: Using QN908x Development kit to program external QN9080 device

DeeY — Mon, 03 Jul 2023 05:39:44 GMT

Thank you, Julián.
The answer is truly helpful!