Specialized Peripherals and Accelerators for NXP Microcontrollers

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Many NXP MCUs based on Arm^® Cortex^®-M core technology include specialized hardware that can help you implement high-performance, low-power solutions. Enabling Software and Technology Tools from NXP allow you to move rapidly and smoothly from initial prototyping to full product development, providing you more time to focus on product differentiation.

Specialized Peripherals and Accelerators have support in MCUXpresso SDK and can also be graphically configured using MCUXpresso Config tools.

Coprocessors (PowerQuad, CASPER) are fully supported by examples and drivers in MCUXpresso SDK.

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Features

High-performance peripherals with MCUXpresso SDK driver/middleware support
High-performance, energy efficient DSP processing
Cost optimization using on-board programmable logic
MCUXpresso Config tools simplify driver configuration

Libraries and Examples

Libraries and Examples Provided Through MCUXpresso SDK

MCUXpresso Config tools help to set up the specialized peripherals and accelerators - the Programmable Logic Unit (PLU) either by a Verilog source code or by a schematic gates or LUTs design, the FlexIO and FLEXCOMM specialized interfaces by numerous predefined protocols and the State Configurable Timers (SCT) with a possibility to explore and reuse numerous presets.
NXP has comprehensive enablement for the specialized interfaces and accelerators that differentiate its Arm Cortex-M-based microcontrollers. Each hardware feature is complemented with MCUXpresso SDK drivers and/or MCUXpresso configuration tool support, to help you complete an in-depth evaluation and get started with your design.

Programmable Logic

Available on LPC804 and select LPC5500 series MCUs
Design flows with Verilog, schematic capture or direct methods
Integration with MCUXpresso configuration tools

Coprocessors

PowerQuad DSP coprocessor for MCUs based on Cortex-M33 cores
CASPER security coprocessor for MCUs based on Cortex-M33 cores

Specialized Interfaces

Complex timing waveform generation
Intelligent peripherals
Highly efficient, low core overhead

Programmable Logic

The LPC804 MCU and several devices in the LPC5500 series incorporate a Programmable Logic unit (PLU) that can be used to implement a variety of interfaces and/or glue logic functions, reducing system component count and often greatly reducing processing load on the MCU itself. Logic designs for the PLU can be created and validated using the PLU Register Initialization Component in the peripherals tool from the MCUXpresso configuration tools suite.

Devices with the PLU feature are shown below. Note that the SDK support for these boards can also be downloaded from within MCUXpresso IDE.


Device Family	Core	Programmable Logic Unit	Recommended Evaluation Boards
LPC804	Cortex-M0+		LPCXpresso804
LPC55S6x	Dual Cortex-M33		LPCXpresso55S69
LPC552x/S2x	Cortex-M33		LPCXpresso55S28
LPC551x/S1x	Cortex-M33		LPCXpresso55S16

Coprocessors

Arm Cortex-M33 Coprocessor

The Armv8-M architecture includes support for coprocessor extensions, and NXP has used this capability to develop highly efficient extensions for DSP and security-related processing.

PowerQuad Coprocessor

PowerQuad is a coprocessor designed by NXP to improve energy efficiency and performance when implementing DSP algorithms using its MCUs based on Cortex-M33 core. PowerQuad can be programmed directly or via an API that is compatible with Arm’s CMSIS-DSP library. MCUXpresso SDK includes API header files to support CMSIS-DSP, plus several examples showing their use.

Supported CMSIS-DSP API calls include:

Matrix functions
- arm_mat_add_q15, arm_mat_add_q31, arm_mat_add_f32
- arm_mat_sub_q15, arm_mat_sub_q31, arm_mat_sub_f32
- arm_mat_mult_q15, arm_mat_mult_q31, arm_mat_mult_f32
- arm_mat_inverse_f32
- arm_mat_trans_q15, arm_mat_trans_q31, arm_mat_trans_f32
- arm_mat_scale_q15, arm_mat_scale_q31, arm_mat_scale_f32
Math functions
- arm_sqrt_q15, arm_sqrt_q31
- arm_sin_q15, arm_sin_q31, arm_sin_f32
- arm_cos_q15, arm_cos_q31, arm_cos_f32
Filter functions
- arm_fir_q15, arm_fir_q31, arm_fir_f32
- arm_conv_q15, arm_conv_q31, arm_conv_f32
- arm_correlate_q15, arm_correlate_q31, arm_correlate_f32
Transform functions
- arm_rfft_q15, arm_rfft_q31
- arm_cfft_q15, arm_cfft_q31
- arm_ifft_q15, arm_ifft_q31
- arm_dct4_q15, arm_dct4_q31

PowerQuad has other hardware capabilities, such as transcendental functions, and examples of using these are also provided in the SDK.

Devices with PowerQuad are shown below. Note that the SDK support for these boards can also be downloaded from within MCUXpresso IDE.


Device Family	Cores	Recommended Evaluation Boards
LPC55S6x	Dual Cortex-M33	LPCXpresso55S69
i.MX RT685	Cortex-M33 and Cadence^® Tensilica^® HiFi 4 DSP	MIMXRT685-EVK

CASPER

To address the challenges of asymmetric cryptography, NXP has developed CASPER, a Cryptographic Accelerator and Signaling Processing Engine with RAM-sharing. It is a hardware accelerator engine for certain asymmetric cryptographic algorithms, such as Elliptic Curve Cryptography (ECC). CASPER sits on the Cortex-M33 coprocessor buses. CASPER is utilized by NXP’s implementation of MbedTLS in MCUXpresso SDK, so you can take advantage of the speed and energy-saving benefits with no additional effort compared to a software-only approach.

Devices with CASPER are shown below. Note that the SDK support for these boards can also be downloaded from within MCUXpresso IDE.


Device Family	Cores	Recommended Evaluation Boards
LPC55S6x	Dual Cortex-M33	LPCXpresso55S69
i.MX RT685	Cortex-M33 and Cadence Tensilica HiFi 4 DSP	MIMXRT685-EVK

Specialized Interfaces

NXP microcontrollers include powerful, innovative interface peripherals to reduce system cost, improve energy consumption and leave more processor cycles for your application.

Interface Block

LPC5500 series MCUs incorporate a specialized, programmable peripheral block that can be used to implement a variety of interfaces with little or zero overhead for the Arm cores they contain, enabling you to implement lower system cost implementations, save energy and leave more processing cycles for your applications. NXP provides drivers and examples for some specialized peripherals (upon request) that can be used with MCUXpresso SDK projects.

Devices with this specialized peripheral block feature are shown below.


Device Family	Cores	Keyboard Scanner	Rotary Encoder	Recommended Evaluation Boards
LPC55S6x	Dual Cortex-M33			LPCXpresso55S69
LPC552x/S2x	Cortex-M33			LPCXpresso55S28
LPC551x/S1x	Cortex-M33			LPCXpresso55S16

State-controlled Timers

Several MCUs in NXP’s portfolio include powerful peripherals that can solve many logic and timing challenges.

The State Configurable Timer (SCT) is available on most LPC and i.MX RT600 microcontrollers. At its core, the SCT is a up/down counter that can be sequenced with up to 16 events on LPC5500 series devices (the number of events supported varies with the device family). The events can be triggered by IO or by one of 16 possible counter matches. An event can then update a state variable, generate IO activity (set, clear, toggle) or start/stop/reverse the counter. In some cases, the SCT can be used to build a semiautonomous subsystem, with very low MCU overhead to manage it. Using these capabilities, a broad range of sophisticated system designs can be implemented, often achieving system cost savings by reducing the need for external FPGAs or other components. MCUXpresso SDK includes examples of PWM timer implementations using the SCT, and the MCUXpresso Peripheral Configuration Tool enables design of state machine-controlled timers on-the-fly.

FlexIO Module

The FlexIO module is available in several members of the K32, Kinetis, i.MX RT MCU families. The FlexIO module is very flexible, allowing you to configure it according to your communication needs; it is capable of emulating various serial communication protocols such as UART, SPI and I²C. The main components of the FlexIO module are the shifters, timers and pins; data is loaded onto a shifter and a timer is assigned to generate the shifter clock and use a pin to input/output the data to/from the shifter. Shifters have a timer assigned to them to generate the shift clock and it can be configured to shift data in or out. Beyond serial interfaces, FlexIO can also emulate parallel interfaces, such as LCD display drivers, with very low MCU overheard. Examples using FlexIO to emulate I²C, I²S, UART, SPI and displays that match the 8080 and 6800 bus protocols are included in MCUXpresso SDK and Peripheral configuration tools, along with PWM driver examples. Examples for camera interfaces and IrDA camera interfaces are available in application notes from the NXP website by searching for “FlexIO application note”.

The table below shows which devices include the SCT and/or FlexIO special peripherals.


Device Family	Cores	FlexIO	SCT
K8x, K27/28	Cortex-M4		-
KE1xx	Cortex-M4/M0+ / Cortex-M0+		-
KL (excl. KL0x)	Cortex-M0+		-
K32 L	Cortex-M4/M0+ / Cortex-M0+		-
i.MX RT1010	Cortex-M7		-
i.MX RT1020	Cortex-M7		-
i.MX RT1050	Cortex-M7		-
i.MX RT1060	Cortex-M7		-
i.MX RT1160	Cortex-M7 / Cortex-M4		-
i.MX RT1170	Cortex-M7 / Cortex-M4		-
LPC81x/82x/83/x84x	Cortex-M0 / M0+	-
LPC51U68	Cortex-M0+	-
LPC54000	Cortex-M4	-
LPC5500	Cortex-M33 / Dual Cortex-M33	-
i.MX RT500	Cortex-M33 / Cadence Tensilica Fusion F1 DSP
i.MX RT600	Cortex-M33 / Cadence Tensilica HiFi 4 DSP	-

ドキュメント

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Introducing the LPC PLU Configuration Tool

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Specialized Peripherals and Accelerators for NXP Microcontrollers

ソフトウェア詳細

Features

Libraries and Examples

Libraries and Examples Provided Through MCUXpresso SDK

Programmable Logic

Coprocessors

Arm Cortex-M33 Coprocessor

PowerQuad Coprocessor

CASPER

Specialized Interfaces

Interface Block

State-controlled Timers

FlexIO Module

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