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Realtek offers integrated, reliable, energy-efficient and Security wireless SoCs

Highlights

In addition to integrating essential peripheral interfaces for IoT development, Secure Boot, AES/SHA hardware encryption engine, authenticated debug access, Wi-Fi 4 2.4GHz, BLE, and other important functions, this IC also supports the following features:

Dual-core Architecture

Integrates an application processor and a network processor, with maximum frequencies of 345MHz and 115MHz respectively, supports FPU/DSP extension instructions, integrates 512KB SRAM, and supports DQ8 DDR PSRAM

System Security

Supports Arm TrustZone®-M, integrates authentication, TRNG, and is PSA Level 2 certified

Wi-Fi Features

Supports Wi-Fi 4 dual-band, R-MESH, network card mode

Bluetooth Features

Supports BLE 5.0, BLE Mesh 1.1, and BLE Long Range

Display Interface

Integrates OSPI display interface, pixel processing engine, and adapts to various display specifications

More

Ultra-low power, DMIC/I2S, USB 2.0 device mode

Part Number Comparison

Part number	RTL8721DAF-VA2-CG	RTL8721DAF-VT2-CG	RTL8721DAM-VA2-CG	RTL8721DCF-VA2-CG	RTL8721DCM-VA2-CG	RTL8721DCM-VA3-CG	RTL8721DGF-VW2-CG	RTL8721DGM-VW2-CG
Real-M300	345MHz	345MHz	345MHz	345MHz	345MHz	345MHz	345MHz	345MHz
Real-M200	115MHz	115MHz	115MHz	115MHz	115MHz	115MHz	115MHz	115MHz
On-chip SRAM	512KB	512KB	512KB	512KB	512KB	512KB	512KB	512KB
TrustZone	Y	Y	Y	Y	Y	Y	Y	Y
NOR Flash	4MB	4MB	X	4MB	X	X	4MB	X
PSRAM	X	X	4MB	X	4MB	8MB	X	4MB
Wi-Fi	Wi-Fi 4 (2.4GHz + 5GHz)	Wi-Fi 4 (2.4GHz + 5GHz)	Wi-Fi 4 (2.4GHz + 5GHz)	Wi-Fi 4 (2.4GHz + 5GHz)	Wi-Fi 4 (2.4GHz + 5GHz)	Wi-Fi 4 (2.4GHz + 5GHz)	Wi-Fi 4 (2.4GHz + 5GHz)	Wi-Fi 4 (2.4GHz + 5GHz)
Bluetooth	LE	LE	LE	LE	LE	LE	LE	LE
Operating voltage	2.97V ~ 3.63V	2.97V ~ 3.63V	2.97V ~ 3.63V	2.97V ~ 3.63V	2.97V ~ 3.63V	2.97V ~ 3.63V	1.71V ~ 3.63V	1.71V ~ 3.63V
Operating temperature	-20°C ~ 85°C	-40°C ~ 105°C	-20°C ~ 85°C	-20°C ~ 85°C	-20°C ~ 85°C	-20°C ~ 85°C	-20°C ~ 85°C	-20°C ~ 85°C
Package (mm)	QFN48 (6 x 6)	QFN48 (6 x 6)	QFN48 (6 x 6)	QFN68 (8 x 8)	QFN68 (8 x 8)	QFN68 (8 x 8)	BGA100 (5.1 x 5.1)	BGA100 (5.1 x 5.1)

System Architecture

Real-M300 (KM4)

Armv8.1-M Architecture
Arm® Cortex®-M55 ISA compatible
Up to 345MHz, 3-stage pipeline
16KB instruction cache
16KB data cache
FPU/DSP instruction extensions
Arm TrustZone®-M

Real-M200 (KM0)

Armv8-M Architecture
Arm® Cortex®-M23 ISA compatible
Up to 115MHz, 2-stage pipeline

Memory System

512KB SRAM
QSPI NOR Flash: Up to 104MHz
DQ8 DDR PSRAM: Up to 200MHz

Peripheral Interfaces

Function	Quantity	Notes
GPIO	56	pcs
SPI	2	pcs
UART	4	pcs
I2C	2	pcs
Key-Scan	64	keys
IR (Infrared Trnaseiver)	1	pcs
RTC	1	pcs
General Timer	10	pcs
PWM	8	channels
Capture Timer	1	pcs
12-bit ADC	7	channels
Dedicated Battery ADC	1	channel
Touch Keys	4	keys
GDMA	8	channels
Independent Watchdog	1	pcs
Secure Watchdog	1	pcs
Normal Watchdog	2	pcs
USB 2.0	1	pcs
SDIO Device	1	pcs
Serial LED Controller	1	pcs
Pixel Processing Engine	1	For fast image data processing
OSPI Display Interface	1	Supports OSPI, QSPI, SPI interface screens
Audio Codec	1	Includes 2-channel digital microphones (DMIC)
I2S	2	Up to 192kHz, supports up to 8-channel data TX/RX

Security Features

We consistently prioritize security as the core of our products, offering our customers a rich array of security features through hardware design and providing exceptional hardware-based attack resistance, helping to create IoT products with ultimate security.

Features	Support	Comment
Symmetric Encryption Engine
Asymmetric Encryption Engine
Secure Boot
Flash OTF Decryption
Arm TrustZone®-M
OTP Secure Storage
Debug Password Protection
HUK Derivation Mechanism
True Random Number Generator (TRNG)

PSA Level-2 Security Certification

Provide a laboratory evaluation of the PSA Root of Trust (PSA-RoT) to demonstrate its resilience against scalable software attacks.

Secure Boot

Based on asymmetric encryption and digital signature mechanisms, it verifies public key hashes and firmware signatures. This process can prevent tampering and rollback attacks, ensuring that the device only runs trusted firmware

Flash OTF Decryption

Supports both embedded and external Flash, with independent key encryption for multiple firmware. When the CPU executes encrypted firmware, it is decrypted in real-time by hardware, with nearly imperceptible performance impact. Supports unique encryption for each device, preventing injection and cloning attacks

Arm TrustZone®-M

Based on the Arm TrustZone® architecture, coupled with a dedicated hardware access control unit, it achieves strong isolation protection for secure memory areas and secure peripherals. Meanwhile, secure firmware is decrypted by the security encryption engine and loaded into the secure RAM area, ensuring protection against leakage and tampering throughout the entire process

OTP Secure Storage

Physical-level anti-extraction, key area locked for access only by the security engine, tamper-resistant and read-proof. Supports independent secure zones and CRC verification

True Random Number Generator (TRNG)

Generates high-security random numbers based on physical entropy sources. Certified by NIST for randomness. Provides unpredictability to the system, resistant to prediction attacks

HUK Derivation Mechanism

Hardware Unique Key (HUK) with physical isolation protection, unreadable and unclonable, used for secure derivation of application keys

Debug Password Protection

Strict control over debug interface access through authentication mechanisms. Supports authorized access and permanent closure, eliminating physical debug attacks. Meets security management requirements at different stages of the product lifecycle, effectively enhancing overall security

Security Certifications Support

We offer support for multiple security certifications. By providing these advanced security features and certification support, we aim to assist our customers in efficiently meeting various market entry requirements, ensuring the security and competitiveness of their products.

PSA
NIST STS
NIST CAVP
FIPS 140-3
RED (EN 18031)

Most of our chips are capable of achieving PSA Certified Level 2 and Level 3, with some chips already having completed PSA Certified Level 2 certification.

Wireless Connectivity

Wi-Fi Features
Features	Support	Comment
Frequency	2.4GHz/5GHz
Wi-Fi 6
Bandwidth	40MHz
MaximumPHY rate	150Mbps	HT MCS7
Main Protocols	802.11 a/b/g/n
Sub-protocols	802.11 e/i/w/d/k/v/r
Other Key Protocols	WMM/WPA1~3/WPS/802.1X/EAP/P2P/NAN
UL LDPC		UL Low-Density Parity-Check Code
DL STBC		DL Space-Time Block Coding
Auto Antenna Diversity
CSI		Channel State Information
MCC		Multi-Channel Concurrency
R-MESH		Realtek MESH
Wi-Fi Card Mode
BT Features
Features	Support	Comment
BLE
Long-Range Mode		LE Coded PHY long-range mode (125kbps/500kbps)
Scatternet		8 masters + 3 slaves

Power Consumption

Mode	Wi-Fi	Power Consumption	Unit	Comment
Deep-Sleep	OFF	13.9	µA	Flash package
Sleep	OFF	37.7	µA	Flash package
Active	OFF	6.56	mA	0.9v WFI mode
WoWLAN	DTIM=3	165	µA	2.4G mode
WoWLAN	DTIM=10	84	µA	2.4G mode

NOTICE:

Test conditions: 3.3V, 25°C
WoWLAN: System average power consumption

Application Scenarios

Dolby Atmos Speaker
Wi-Fi Card Mode
BLE gateway
Smart POS
Smart home

Smart thermostat
Smart door lock
Battery camera
Smart remote controller

Development Resources

Software Resources

FreeRTOS SDK Download	Link
FreeRTOS SDK Guide	Link
Development Tools	Link
VS Code Extension	Link

Hardware Resources

Datasheet	Link
Pinmux Table	Link
Pinmux Auto-Layout	Link
Schematic & PCB Design	Link

EVB Purchase

PKE8721DAF-C13-F10 (Taobao)	Link
PKE8721DAF-C13-F10 (Amazon)	Link

Highlights

In addition to essential features for IoT development like peripheral interfaces, secure boot, AES/SHA hardware crypto engine, and authenticated debug access, as well as Wi-Fi 4 2.4G and BLE, this IC also supports the following functions:

Dual-Core Architecture

Integrates two processors, Armv8.1-M and RISC-V, both running up to 400MHz. Integrates 768KB SRAM and supports DQ8 DDR PSRAM.

System Security

Supports TrustZone®-M, integrates TRNG/ECDSA, and is PSA Level 1 certified.

Wi-Fi Features

Supports Wi-Fi 6 2.4G, Network Adapter Mode

Bluetooth Features

Supports BLE 5.2, BLE Mesh 1.1, and BLE Long Range

Audio Codec

Integrates DMIC, I2S, VAD, and mono PDM output.

Part Number Comparison

Part number	RTL8720EAF-VA2-CG	RTL8720EAF-VA3-CG	RTL8720EAM-VA2-CG	RTL8720EAM-VT2-CG
Real-M300	400MHz	400MHz	400MHz	400MHz
KR4	400MHz	400MHz	400MHz	400MHz
DSP	X	X	X	X
On-chip SRAM	768KB	768KB	768KB	768KB
TrustZone	Y	Y	Y	Y
NOR Flash	4MB	8MB	X	X
PSRAM	X	X	4MB	4MB
Wi-Fi	Wi-Fi 6 (2.4GHz)	Wi-Fi 6 (2.4GHz)	Wi-Fi 6 (2.4GHz)	Wi-Fi 6 (2.4GHz)
Bluetooth	LE	LE	LE	LE
Operating voltage	2.97V ~ 3.63V	2.97V ~ 3.63V	2.97V ~ 3.63V	2.97V ~ 3.63V
Operating temperature	-20°C ~ 85°C	-20°C ~ 85°C	-20°C ~ 85°C	-40°C ~ 105°C
Package (mm)	QFN48 (6 x 6)	QFN48 (6 x 6)	QFN48 (6 x 6)	QFN48 (6 x 6)

System Architecture

Real-M300 (KM4)

Armv8.1-M Architecture (Arm Cortex®-M55 ISA compatible)
Up to 400MHz clock frequency, 3-stage pipeline
16KB instruction cache
16KB data cache
Integrated FPU/DSP instruction extensions
Hardware-level isolation with Arm TrustZone®-M

KR4

RISC-V RV32IMAFC Architecture
400MHz Single-Issue In-Order Pipeline
16KB instruction cache
16KB data cache
Open-source ISA architecture, supports custom extensions

Memory System

768KB SRAM
QSPI NOR Flash: Up to 100MHz
DQ8 DDR PSRAM: Up to 200MHz

Peripheral Interfaces

Function	Quantity	Notes
GPIO	27	pcs
SPI	2	pcs
UART	5	pcs
I2C	2	pcs
IR (Infrared Transceiver)	1	pcs
RTC	1	pcs
General Timer	15	pcs
PWM	8	channels
Capture Timer	1	pcs
12-bit ADC	6	channels
Touch Key	9	keys
GDMA	8	channels
Independent Watchdog	1	pcs
Secure Watchdog	1	pcs
Normal Watchdog	2	pcs
Serial LED Controller	1	pcs
On-chip Temperature Sensor	1	pcs
Digital Microphone	4	channels
I2S	2	Up to 192kHz sampling rate, up to 8-channel data transmission
VAD	1	Supports voice activity detection
PDM Output	1	Mono channel

Security Features

We consistently prioritize security as the core of our products, offering our customers a rich array of security features through hardware design and providing exceptional hardware-based attack resistance, helping to create IoT products with ultimate security.

Features	Support	Comment
Symmetric Encryption Engine
Asymmetric Encryption Engine
Secure Boot
Flash OTF Decryption
Arm TrustZone®-M
OTP Secure Storage
Debug Password Protection
HUK Derivation Mechanism
True Random Number Generator (TRNG)

Secure Boot

Based on asymmetric encryption and digital signature mechanisms, it verifies public key hashes and firmware signatures. This process can prevent tampering and rollback attacks, ensuring that the device only runs trusted firmware

Flash OTF Decryption

Supports both embedded and external Flash, with independent key encryption for multiple firmware. When the CPU executes encrypted firmware, it is decrypted in real-time by hardware, with nearly imperceptible performance impact. Supports unique encryption for each device, preventing injection and cloning attacks

Arm TrustZone®-M

Based on the Arm TrustZone® architecture, coupled with a dedicated hardware access control unit, it achieves strong isolation protection for secure memory areas and secure peripherals. Meanwhile, secure firmware is decrypted by the security encryption engine and loaded into the secure RAM area, ensuring protection against leakage and tampering throughout the entire process

Asymmetric Encryption Engine

In addition to the essential symmetric encryption engines like AES for IoT, we also provide computationally more intensive asymmetric encryption algorithms such as ECDSA, EdDSA, and RSA. This greatly alleviates the computational burden on the CPU and improves encryption and decryption speeds

OTP Secure Storage

Physical-level anti-extraction, key area locked for access only by the security engine, tamper-resistant and read-proof. Supports independent secure zones and CRC verification

True Random Number Generator (TRNG)

Generates high-security random numbers based on physical entropy sources. Certified by NIST for randomness. Provides unpredictability to the system, resistant to prediction attacks

HUK Derivation Mechanism

Hardware Unique Key (HUK) with physical isolation protection, unreadable and unclonable, used for secure derivation of application keys

Debug Password Protection

Strict control over debug interface access through authentication mechanisms. Supports authorized access and permanent closure, eliminating physical debug attacks. Meets security management requirements at different stages of the product lifecycle, effectively enhancing overall security

Security Certifications Support

We offer support for multiple security certifications. By providing these advanced security features and certification support, we aim to assist our customers in efficiently meeting various market entry requirements, ensuring the security and competitiveness of their products.

PSA
NIST STS
NIST CAVP
FIPS 140-3
RED (EN 18031)

Most of our chips are capable of achieving PSA Certified Level 2 and Level 3, with some chips already having completed PSA Certified Level 2 certification.

Wireless Connectivity

Wi-Fi Features
Features	Support	Comment
Frequency	2.4GHz
Wi-Fi 6
Bandwidth	20MHz
Maximum PHY rate	114.7Mbps	HE MCS9
Main Protocols	802.11 b/g/n/ax
Sub-protocols	802.11 e/i/w/d/k/v/r
Other Key Protocols	WMM/WPA1~3/WPS/802.1X/EAP/P2P/NAN
UL/DL OFDMA & DL MU-MIMO
SU/MU Beamformee
TWT		Target Wake Time
UL LDPC		UL Low-Density Parity-Check Code
DL STBC		DL Space-Time Block Coding
Auto Antenna Diversity
CSI		Channel State Information
MCC		Multi-Channel Concurrency
Wi-Fi Card Mode
BT Features
Features	Support	Comment
BLE
Long-Range Mode		LE Coded PHY long-range mode (125kbps/500kbps)
Scatternet		Scatternet concurrent master/slave operation
AoA/AoD positioning		±15° accuracy
SIG Mesh		Certified for SIG Mesh v1.0/v1.1.1

System Power Consumption

Mode	Wi-Fi	Power Consumption	Unit	Comment
Deep-Sleep	OFF	57.4	µA	PSRAM package
Sleep	OFF	700	µA	PSRAM package
Active	OFF	20.0	mA	0.9v WFI mode, CPU frequency=400MHz
WoWLAN	DTIM=3	1.48	mA	2.4G mode
WoWLAN	DTIM=10	1.36	mA	2.4G mode

NOTICE:

Test conditions: 3.3V, 25°C
WoWLAN: System average power consumption

Application Scenarios

Home appliance
Industrial control
Energy storage

Smart thermostat
BLE gateway
Micro inverter