how to set default I2C pin(SDA AND SCL) for nrf52832 using UICR customer register?

[dewal]

How to set  SDA= p0.25;and SCL=P0.26 default pin configration.

[Turbo J]

You don't use UICR for that.

You use either sdk_config.h or the custom board header file for your board (when using NRF SDK).

[dewal]

Thank you for reply.

how can i go through sdk_config.h file.please explain me

[dewal]

can you explain in depth please .

[Turbo J]

Can you explain in depth why you think you needed that feature, and what you did not understand in the PS, TWI and TWIM chapters?

[dewal]

for the appliaction purpose  design our own IC of nrf52. so i need the default pin configuration for that. can you explain me nrf_sdk I2c example. I am new for nrf so i didn't understand their example.

[dewal]

#define TWI0_CONFIG_FREQUENCY    NRF_TWI_FREQ_100K
#define TWI0_CONFIG_SCL 0x1b
#define TWI0_CONFIG_SDA 0x1a

Is this PSEL_xx register configuration?? 

0x1b and 0x1a  are bit selection in  PSEL.SCA and PSEL.SDA  ???

if  these are correct, then tell me how they get write this exact vslues on the register?

[Turbo J]

The PS (V1.4, chapter 49.8.6) leaves no ambiguity here:

"PSELSCL [0..31] Pin number configuration for TWI SCL signal".

Any experienced programmer can calculate the decimal pin number from those simple hex values - and everybody else just uses windows calculator in programmer mode.

SCL is  P0.26, SDA is P0.27 as shown here.

Dunno why the values are encoded in hex in your case. Decimal values work fine here, and would match the P0.xx values from the PS.