SWD Init sequence with E2-Lite

Good morning,

I'm quite unable to properly understand the SWD initialization,

The board I use includes the following MCU : RA4M1 : R7FA4M1AB3CFM

• Firstly, when plugging the E2-Lite to a power supplied board, following happens on the flasher:
  
  • Vcc led lights up
  • Reset led lights up and Board Reset line gets grounded
• Next, when i initiate "Connect", we have:
  • SWDIO high
  • SWCLK high
  • 500 ms pass, then Device not responding

Could you please highlight about both points:

Why (and is it normal) that the E2 Lite tool grounds the line (even with High-Z setting in the software settings) ?

What is the init sequence, should i see the MCU pulling low SWDIO or SWCLK while flasher holds Reset line low ?

I'd like to understand and have little more informations about a proper SWD sequence (at least the init phase).

Thanks & Regards,

Jean-François