nRF52840 SPIM3 @32MHz functionnal on Engineering sample B?

Question

HI there, 
 
 I read somewhere here that the SPIM3 bus would be capable of 32MHz operations in the "next" chip revision (that was 6 months ago). 
 Could you confirm that it is now the case with the Engineering Sample B? 
 
 Thank you, 
 Mickael

Håkon Alseth · Accepted Answer

Hi, 
 
 The SPIM3 is present for engineering B, but it has these erratas: 
 RX buffer error at 32 MHz operation 
 SPIM3 does not generate EVENTS_END and halts if suspended during last byte 
 SPIM3 events incorrectly connected to the PPI 
 
 The first one is the most crucial for 32M operation, effectively limiting the operation frequency down to 16M. You should have engineering C if you need to evaluate 32MHz SPI operations. 
 
 For Engineering C, the errata #189 "RX buffer error at 32 MHz operation" is fixed, as shown in this section of the errata document: 
 http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52840.EngC.errata/dita/errata/nRF52840/EngineeringC/latest/err_840_fixed.html?cp=2_0_1_0_2 
 
 Cheers, 
 Håkon