nRF51 as a standalone system

RE: nRF51 as a standalone system

awneil — Thu, 23 Jan 2020 18:50:16 GMT

Note that the nRF51 family is not recommended for new BLE designs:

https://devzone.nordicsemi.com/f/nordic-q-a/42960/status-of-nrf51-products/169728#169728

RE: nRF51 as a standalone system

Jay Tyzzer — Thu, 23 Jan 2020 16:21:58 GMT

Hi SKR,

The nRF51 is a older part in the Nordic nRF5 family. I would suggest looking at one of the nRF52 based modules.

www.nordicsemi.com/.../3rd-party-modules

The device you chose will depend on the number of GPIOs you need as well as the Flash and RAM requirements. The nRF52 has hard wired PWMs. The number of them will depend on the device. I would suggest looking at modules based on the nRF52832. nRF52840 or the nRF52833.

RE: nRF51 as a standalone system

Dmitry — Thu, 23 Jan 2020 16:20:34 GMT

Hi,

SPI/I2C is a shared peripheral, you can't have 2 SPI and one I2C at the same time. Also each PWM instance requires a timer (if you mean that they should work independently, not three channels of one PWM), but TIMER0 is used by BLE stack - you have only 2 timers.
Take a look an nRF52832, it has three SPI/I2C instances and three hardware PWMs.