Currently we are working on a design for a secure beacon using the DA14580. We are trying to minimize the size of the PCB and additionally to make it harder to read the internal OTP.
Therefore we would like the PCB to NOT have UART TX RX or jtag pads. However this means we would need to program the device before assembly.
1) Is it possible to program the OTP before assembly using an adapter (like adapter)
2) What are the minimal connections for programming only (VBAT,VPP,UART RX, URAT TX, JTAG, SWDIO, SW_CLOCK,RST)?
3) is it posible to program without xtal, antenna and VDCDC, VDCDC_RF circuit?
3) Is it possible to make the OTP unreadable or disable acces after programming?