For the WLCSP package the inner ring connections ( P0_1, P0_2, P0_4, P0_7 , P1_0, P1_1, P1_2 and P1_3 )
can only be used with a Multi-layer PCB with micro vias.
I would like to use the WLCSP package on a two-layer PCB.
There is no micro vias available , how can I program the OTP memory ?
Ususally it's done via the UART at BOOT with one signal in the inner ring..