ARM Cortex-M4(F) Version used in nRF52?

Question

I'm not sure how often the Cortex-M4(F) design from ARM is updated, but what is version used in Nordic nRF52810/52832 devices? I want to know what ARM documentation version I should be looking at for the generic user guide/technical reference manual. See http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.cortexm.m4/index.html 
 Sorry if this information is posted in Nordic datasheet/infocenter, but I didn't see it beyond a generic "reference ARM Cortex user guide". 
 Thanks

Amanda Hsieh · Accepted Answer

Hi, 
 
 what is version used in Nordic nRF52810/52832 devices? 
 It is Cortex-M4 r0p1. You will see the information when the J-Link Commander starting and connecting to the device like this . 
 
 -Amanda H.

hmolesworth · Answer

Try this: NRF_LOG_INFO("nRF52832 CPUID 0x%08X, PFR0 0x%08X, PFR0 0x%08X", SCB->CPUID, SCB->PFR[0], SCB->PFR[1]); // app: nRF52832 CPUID 0x410FC241, PFR0 0x00000030, PFR0 0x00000200 // The CPUID Base Register bit assignments are: // IMPLEMENTER bits[31:24] Implementer code assigned by ARM. Reads as 0x41 for a processor implemented by ARM. // VARIANT bits[23:20] Implementation Defined variant number. // ARCHITECTURE bits[19:16] Reads as 0xF, see About the CPUID scheme on page B4-644. // PARTNO bits[15:4] Implementation Defined part number. // REVISION bits[ 3:0] Implementation Defined revision number NRF_LOG_INFO("nRF52832 CPUID.IMPLEMENTER bits[31:24] 0x%08X", (SCB->CPUID & SCB_CPUID_IMPLEMENTER_Msk) >> SCB_CPUID_IMPLEMENTER_Pos); NRF_LOG_INFO("nRF52832 CPUID.VARIANT bits[23:20] 0x%08X", (SCB->CPUID & SCB_CPUID_VARIANT_Msk) >> SCB_CPUID_VARIANT_Pos); NRF_LOG_INFO("nRF52832 CPUID.ARCHITECTURE bits[19:16] 0x%08X", (SCB->CPUID & SCB_CPUID_ARCHITECTURE_Msk) >> SCB_CPUID_ARCHITECTURE_Pos); NRF_LOG_INFO("nRF52832 CPUID.PARTNO bits[15:4] 0x%08X", (SCB->CPUID & SCB_CPUID_PARTNO_Msk) >> SCB_CPUID_PARTNO_Pos); NRF_LOG_INFO("nRF52832 CPUID.REVISION bits[ 3:0] 0x%08X", (SCB->CPUID & SCB_CPUID_REVISION_Msk) >> SCB_CPUID_REVISION_Pos); Output on nRF52832 (note same code as reported by J-Link): app: nRF52832 CPUID 0x410FC241, PFR0 0x00000030, PFR0 0x00000200 app: nRF52832 CPUID.IMPLEMENTER bits[31:24] 0x00000041 app: nRF52832 CPUID.VARIANT bits[23:20] 0x00000000 app: nRF52832 CPUID.ARCHITECTURE bits[19:16] 0x0000000F app: nRF52832 CPUID.PARTNO bits[15:4] 0x00000C24 app: nRF52832 CPUID.REVISION bits[ 3:0] 0x00000001 See ARM v7-M Architecture Technical Manual at armv7m_arm.pdf

ARM Cortex-M4(F) Version used in nRF52?

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