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SWD, newer ARM JTAG or Both? 2 marked pins(on the other side) and 18 pads. ARM JTAG is 14 or 20 pin. A pin and a pad are connected by a trace so I would assume that it is both SWD and JTAG. This should help a lot.
SWD, newer ARM JTAG or Both? 2 marked pins(on the other side) and 18 pads. ARM JTAG is 14 or 20 pin. A pin and a pad are connected by a trace so I would assume that it is both SWD and JTAG. This should help a lot.
CortexM3 or M4 are likely the Core with it likely running a RTOS of some variety.
The nrf52832 used the M4 Core and a Broadcom wireless chip used the M4 or M3. That's enough of this rabbit hole for now.