Kinetis Microcontrollers中的主题 Re: How to use KEA128 UART port as bootloader?

How to use KEA128 UART port as bootloader?

1143291277 — Mon, 29 Apr 2019 06:47:41 GMT

I want to know is there any example of hardware circuit design that using UART port of S9KEAZ128 chip as bootloader? I found the AN5400.pdf from the NXP website, but there's no hardware circuit examples. Can you help me? Thanks so much!

Re: How to use KEA128 UART port as bootloader?

jingpan — Mon, 29 Apr 2019 08:23:34 GMT

Hi,

Please download from this link https://community.nxp.com/message/1087467?commentID=1087467#comment-1087467

Regards,

Jing

Re: How to use KEA128 UART port as bootloader?

1143291277 — Mon, 29 Apr 2019 11:31:00 GMT

Hi Jing Pan，

Thanks so much, but this link still only have AN5400 and that didn't solve my problem. I want some examples of the hardware circuit about the bootloader using the uart port. Anyway thanks a lot!

Re: How to use KEA128 UART port as bootloader?

jingpan — Tue, 30 Apr 2019 02:22:52 GMT

Hi,

There is no special circuit that UART need, just three signal, TX,RX,GND. You can buy a USB-serial adaptor to connect your PC with KEA. If you have no hardware design experience, you can refer to FRDM-KEA128 board. NXP Freedom Development Platform for Ultra Reliable Kinetis EA Series MCUs | NXP

It use openSDA to debug KEA. OpenSDA has a virtual UART channel which connect to KEA UART port.

Regards,

Jing

Re: How to use KEA128 UART port as bootloader?

1143291277 — Sat, 04 May 2019 01:34:41 GMT

thanks a lot! I got it