nRF24LU1 JTAG informations

[anotherandrew]

Does someone have detailed documentation on JTAG interface (TAP informations, how to set use debug capabilty, reflash and so on) on this device from Nordic Semiconductor?

nRF24LU1 is common nrf24 radio connected with 8051 CPU and USB interface directly. JTAG on 8051 is unusual but they have this and use Keil debugger hardware and software. I should like to try to add it to openocd.

[witsanukai]

did you try this?
https://devzone.nordicsemi.com/f/nordic-q-a/13309/is-it-possible-to-apply-ulink2-keil-ide-to-debug-nrf24lu1

On page 162 too.

http://www.nordicsemi.com/eng/nordic/download_resource/7980/1/78494705/2727

Hope this help 

[anotherandrew]

Sir - none of these pages gives detailed informations on the JTAG connection. Pinouts yes. But not description of bit pattern to shift in to access debug access port or equivalence and how to retrieve cpu state or read and write memory or peripherals.