NRF52820-QDAA-R7 datasheet(14/437 Pages) NORDIC

14 / 437 page

4 Core components

4.1 CPU

The ARM® Cortex®-M4 processor has a 32-bit instruction set (Thumb®-2 technology) that implements a

superset of 16- and 32-bit instructions to maximize code density and performance.

This processor implements the following features that enable energy-efficient arithmetic and high-

performance signal processing.

• Digital signal processing (DSP) instructions

• Single-cycle multiply and accumulate (MAC) instructions

• Hardware divide

• 8- and 16-bit single instruction multiple data (SIMD) instructions

The ARM® Cortex® Microcontroller Software Interface Standard (CMSIS) hardware abstraction layer for the

ARM®Cortex® processor series is implemented and available for the M4 CPU.

Real-time execution is highly deterministic in thread mode, to and from sleep modes, and when handling

events at configurable priority levels via the nested vectored interrupt controller (NVIC).

Executing code from flash memory will have a wait state penalty on the nRF52 Series. The Electrical

specification on page 15 shows CPU performance parameters including wait states in different modes,

CPU current and efficiency, and processing power and efficiency based on the CoreMark® benchmark.

The ARM system timer (SysTick) is present on nRF52820. The SysTick's clock will only tick when the CPU is

running or when the system is in debug interface mode.

4.1.1 CPU and support module configuration

The ARM® Cortex®-M4 processor has a number of CPU options and support modules implemented on the

IC.

Option / Module

Description

Implemented

Core options

NVIC

Nested vector interrupt controller

48 vectors

PRIORITIES

Priority bits

WIC

Wakeup interrupt controller

Endianness

Memory system endianness

Little endian

Bit-banding

Bit banded memory

DWT

Data watchpoint and trace

SysTick

System tick timer

YES

Modules

MPU

Memory protection unit

YES

FPU

Floating-point unit

DAP

Debug access port

YES

ETM

Embedded trace macrocell

ITM

Instrumentation trace macrocell

TPIU

Trace port interface unit

ETB

Embedded trace buffer

FPB

Flash patch and breakpoint unit

YES

HTM

AMBA

™ AHB trace macrocell

4463_156 v1.0

NRF52820-QDAA-R7 Datasheet(PDF) 14 Page - Nordic Semiconductor

NRF52820-QDAA-R7 Datasheet(HTML) 14 Page - Nordic Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL