https://devzone.nordicsemi.com/f/nordic-q-a/17826/about-iic-slaveI need to develop the IIC Slave function by using a GPIO of the nrf51822, but the development on the KEIL with C is not enough, GPIO with C program is too slow to follow the IIC master’s communication . So I want to know whether nrf51822 can be developen-USTelligent Community 13Fri, 18 Nov 2016 08:27:24 GMThttps://devzone.nordicsemi.com/thread/68688?ContentTypeID=1Fri, 18 Nov 2016 08:27:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2a848e95-e199-4d88-8746-aef0972fc7c1J&#248;rgen Holmefjord<p>Hi,</p> <p>The nRF51822 contains a ARM Cortex M0 CPU core. You need to read the ARMv6-M Architecture manual which has the instruction set and all the details of the ARMv6 architecture. We don&#39;t provide any SDK for assembly. You can see an example how to use inline assembly in C files for different compilers in the file <em>bootloader_util.c</em> found in <code>\components\libraries\bootloader_dfu</code> folder of <a href="https://developer.nordicsemi.com/nRF5_SDK/nRF5_SDK_v11.x.x/">SDK v11.0.0</a>.</p> <p>Best regards,</p> <p>Jørgen</p><div style="clear:both;"></div>