Device driver interface with nrf51-dk

[Maverick_34]

Hi,

I want to interface sensor which has minimum requirement of UART supporting baudrate 921600 or SPI guaranteed maximum communication speed : 20 MHZ(Measured at 5cm cable length).

So kindly suggest if we can go ahead with nRF51822 and we have evaluation board of nRF51422 to kickstart the development. 

[Jørgen Holmefjord]

Hi,

For nRF51 series, the Maximum supported UART baud rate is 1 Megabaud. For SPI, the maximum frequency is 4 MHz.

Please see page 56-58 of nRF51822 Product Specification v3.3 for more details.

I would recommend that you go with nRF52 series if you are starting development on a new project. nRF52 series ICs have many features over nRF51 series that most projects will benefit from.

Best regards,
Jørgen

[Jørgen Holmefjord]

nRF52840 has support for 32 MHz SPI (High-speed SPI) on SPIM3 instance.

There are currently no automotive grade qualified ICs in the nRF52 series, only nRF51824 have such qualification.

For details on future products and roadmaps, please contact your regional sales manager. (Pm me your location if you do not know who this is).

[Maverick_34]

https://www.nordicsemi.com/Applications/Automotive On this page, it says nRF52840 and other nRF52 series   ble to be suitable for Automotive application. 

[Jørgen Holmefjord]

nRF51824 is the only chip that is AEC-Q100 Grade 2 qualified. If you do not require this qualification or extended temperature range (over +85C), you can, of course, use nRF52 series ICs for your application.