Realtek RTL8721F

SoCs

Ameba IoT wireless solutions, featuring high integration, stable performance, low power consumption, and enhanced security

ARM®/RISC-V | Wi-Fi | Bluetooth | AI | Audio | HMI

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Highlights

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

System Security

Integrating various security features including Arm TrustZone®, TRNG, asymmetric encryption, HUK, OTP storage, Flash XIP decryption, etc., it provides security protection for customer's products.

Wi-Fi 6

Incorporating advanced technologies such as OFDMA, MU-MIMO, TWT and Extended Range, it effectively alleviates wireless resource congestion, enhances weak signal coverage, significantly improves transmission quality, reduces latency, and extends the battery life of IoT devices

Dual-band Wi-Fi

Supporting 5GHz band to effectively avoid common interference sources (Bluetooth, Zigbee, and microwave devices etc.) through spectrum isolation, leveraging abundant non-overlapping channel resources to significantly reduce co-channel interference risks, delivering high-speed, low-interference stable transmission performance

Wi-Fi R-MESH

Multi-hop and multi-branch intelligent networking, significantly extending the AP connection range; underlying layer forwarding and control, transparent to application layer development, eliminating traditional Mesh adaptation constraints; rapid fault self-healing, ultra-low latency, and ultra-high stability, comprehensively breaking through traditional Mesh performance bottlenecks

Display

Equipped with a UI rendering hardware accelerator and an MJPEG hardware decoder enhance HMI performance on smart panels. It supports standard display interfaces, flexibly adaptable from small LCDs to HD screens.

Ethernet Interface

Integrated Ethernet interface ensures reliable critical data transmission in industrial environments and high-interference scenarios, ideal for industrial automation, security monitoring and other applications requiring high network stability.

Ultra-Low Power

Supporting ultra-low-power WoWLAN and enabling rapid restoration of the original runtime contexts, it empowers battery-powered devices with network listening wake-up functionality

More

USB 2.0 High-Speed Host/Device, SDIO Host/Device, SD card/eMMC, A2C

System Architecture

Real-M300 (KM4TZ)

• Armv8.1-M Architecture
• Arm Cortex®-M55 ISA compatible
• Up to 334MHz, 3-stage pipeline
• 16KB I-Cache
• 16KB D-Cache
• Arm TrustZone®-M

Real-M300 (KM4NS)

• Armv8.1-M Architecture
• Arm Cortex®-M55 ISA compatible
• Up to 334MHz, 3-stage pipeline
• 16KB I-Cache
• 16KB D-Cache

Memory System

• 512KB SRAM
• QSPI NOR/NAND Flash: Up to 104MHz
• DQ8/DQ16 DDR PSRAM: Up to 200MHz

Part Number

Select in Current Series Select in All Series

Part number	RTL8721FAF-VT2-CG	RTL8721FAF-VA3-CG	RTL8721FAM-VA2-CG	RTL8721FAM-VT2-CG	RTL8721FCM-VA2-CG	RTL8721FCM-VA3-CG	RTL8721FCM-VA4-CG	RTL8721FLM-VA4-CG
Real-M300 (KM4TZ)	320MHz	320MHz	320MHz	320MHz	320MHz	320MHz	320MHz	320MHz
Real-M300 (KM4NS)	320MHz	320MHz	320MHz	320MHz	320MHz	320MHz	320MHz	320MHz
On-chip SRAM	512KB	512KB	512KB	512KB	512KB	512KB	512KB	512KB
Arm TrustZone
NOR Flash	4MB	8MB
PSRAM			4MB	4MB	4MB	8MB	16MB	16MB
Wi-Fi	Wi-Fi 6 (Dual Band)	Wi-Fi 6 (Dual Band)	Wi-Fi 6 (Dual Band)	Wi-Fi 6 (Dual Band)	Wi-Fi 6 (Dual Band)	Wi-Fi 6 (Dual Band)	Wi-Fi 6 (Dual Band)	Wi-Fi 6 (Dual Band)
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	2.97V ~ 3.63V	2.97V ~ 3.63V
Operating temperature	-40°C ~ 105°C	-20°C ~ 85°C	-20°C ~ 85°C	-40°C ~ 105°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)	QFN48 (6 x 6)	QFN68 (8 x 8)	QFN68 (8 x 8)	QFN68 (8 x 8)	QFN100 (10 x 10)

Peripheral Interfaces

FUNCTION	RTL8721FAF	RTL8721FAM	RTL8721FCM	RTL8721FLM
GPIO	19	12	31	60
SPI	2	2	2	2
UART	5	5	5	5
I2C	2	2	2	2
LCD Controller	1	1	1	1
A2C	2	2	2	2
I2S	1	1	1	1
Digital microphone	2	2	2	2
ADC and Cap-touch	4	4	11	13
Infrared Transeiver	1	1	1	1
SWD Interface	1	1	1	1
General Timer	4	4	4	4
Capture Timer	1	1	1	1
RTC	1	1	1	1
LEDC_Pro	1	1	1	1
PWM	16	16	16	16
USB	1	1	1	1
Ethernet Interface	1	1	1	1
SDIO_HOST	1	1	1	1
SDIO_DEVICE	1	1	1	1
IWDG	1	1	1	1
System WDG	3	3	3	3
GDMA	8	8	8	8
Thermal	1	1	1	1

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.

The third column indicates the current IC series. If it doesn't meet your needs, you can click on other IC series to view them

Features	Filter	RTL8721Dx	RTL8720E	RTL8710E	RTL8726E	RTL8713E	RTL8730E	RTL8721F	RTL872xD	RTL8735B
AES Hardware Engine	Select
SHA Hardware Engine	Select
ECDSA/ECDH Hardware Engine	Select
EDDSA Hardware Engine	Select
RSA Hardware Engine	Select
Secure Boot	Select
Flash OTF Decryption	Select
Arm TrustZone	Select
OTP Secure Storage	Select
True Random Number Generator	Select
HUK Derivation Mechanism	Select
Authenticated Debug Access	Select

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

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

Authenticated Debug Access

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. 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.

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

Wireless Connectivity

The third column indicates the current IC series. If it doesn't meet your needs, you can click on other IC series to view them

Wi-Fi Feature List

Features	Filter	RTL8721Dx	RTL8720E	RTL8710E	RTL8726E	RTL8713E	RTL8730E	RTL8721F	RTL872xD	RTL8735B
Frequency	2.4GHz 2.4GHz/5GHz	2.4GHz/5GHz	2.4GHz	2.4GHz	2.4GHz	2.4GHz	2.4GHz/5GHz	2.4GHz/5GHz	2.4GHz/5GHz	2.4GHz/5GHz
Bandwidth	20MHz 40MHz	40MHz	20MHz	20MHz	20MHz	20MHz	20MHz	20MHz	40MHz	20MHz
Maximum PHY rate	114.7Mbps 150Mbps 72Mbps	150Mbps	114.7Mbps	114.7Mbps	114.7Mbps	114.7Mbps	114.7Mbps	114.7Mbps	150Mbps	72Mbps
802.11a	Select
802.11ax (Wi-Fi6)	Select
802.11b/g/n	Select
802.11e/i/w/d/k/v/r	Select
WMM/WPA1~3/WPS/ 802.1X/EAP	Select
UL LDPC?	Select
DL STBC?	Select
Auto Antenna Diversity	Select
CSI?	Select
MCC?	Select
R-MESH?	Select
Wi-Fi Card Mode	Select
P2P/NAN	Select
TWT?	Select

Bluetooth Feature List

Features	Filter	RTL8721Dx	RTL8720E	RTL8710E	RTL8726E	RTL8713E	RTL8730E	RTL8721F	RTL872xD	RTL8735B
Bluetooth Mode	Bluetooth Dual Mode Bluetooth LE	Bluetooth LE	Bluetooth LE	Bluetooth LE	Bluetooth Dual Mode	Bluetooth Dual Mode	Bluetooth Dual Mode	Bluetooth LE	Bluetooth LE	Bluetooth LE
Bluetooth BR/EDR?	Select
LE Audio?	Select
Dedicated antenna for Bluetooth?	Select
Scatternet?	Select
LE 2Mpbs PHY	Select
LE Long Range?	Select
LE Advertising Extensions?	Select
Periodic Advertising	Select
Periodic Advertising Sync Transfer	Select
Direction Finding (AoA/AoD)?	Select
LE Isochronous Channels (CIS/BIS)?	Select
LE Power Control	Select
SIG Mesh?	Select
High-Power Mode?	Select	TBD

System Power Consumption

Mode	Wi-Fi	Power Consumption	Unit	Comment
Deep-Sleep	OFF	11.3	µA	Flash package
Sleep	OFF	48.2	µA	Flash package
Active	OFF	13.1	mA	0.9V WFI mode, CPU=266MHz
WoWLAN	DTIM=3	185	µA	2.4G mode
WoWLAN	DTIM=10	100	µA	2.4G mode

Note:

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

Application Scenarios

• Wi-Fi R-MESH 🔗
• Wi-Fi Card Mode 🔗
• HMI smart display 🔗
• Dolby Atmos Speaker/Wireless Home Theater 🔗
• Low-power IoT devices
• Smart door lock
• Low-power Wi-Fi camera

• Smart home
• Industrial 4.0
• Health-care devices
• Wearables
• Portable devices
• Gaming accessories
• New energy field
• Ethernet to Wi-Fi dongle

Development Resources

Software Resources

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

Hardware Resources

	Datasheet	Link
	Pin Multiplexing	Link
	Pin Assignment Tool	Link
	Hardware Design Guide	Link