topic Re: LPC5528 JTAG circuit in LPC Microcontrollers

LPC5528 JTAG circuit

yuto — Thu, 19 Nov 2020 02:11:32 GMT

Hi.

Can you tell me about JTAG on the LPC5528?
Is writing programs in JTAG supported?
If so, please tell me about the schematic connections.

Preferred usage
Program writing in JTAG
Debugging with SWD
Write the program at SPI during ISP Boot

ZhangJennie — Thu, 19 Nov 2020 07:51:15 GMT

Hi yuto

Here is a very classic article for JTAG/SWD design

Note that, for LPC5528, JTAG is used on this device for boundary scan and production test ONLY and
cannot to used for debugging purposes.

Have a nice day,

Jun Zhang

yuto — Thu, 19 Nov 2020 08:32:30 GMT

Thank you, Jun Zhang, for your reply!

Tell me more.

>"JTAG is used on this device for boundary scan and production test ONLY"

Flash Programming in JTAG is not possible?

How to programming the firmware you have created is ISP boot?
(UART,SPI,USB,etc..)

ZhangJennie — Fri, 20 Nov 2020 03:08:41 GMT

We use SWD and debug and program.

ISP boot code is in boot ROM, user can't reprogram boot ROM

yuto — Fri, 20 Nov 2020 07:45:24 GMT

Thank you, Jun Zhang, for your reply!

I understand.