Product Overview

Highlights

Dual-core Architecture

• Real-M300 (KM4TZ) @334MHz

  • Armv8.1-M architecture (Arm® Cortex®-M55 ISA compatible)

  • Dedicated application processor

• Real-M300 (KM4NS) @334MHz

  • Armv8.1-M architecture (Arm® Cortex®-M55 ISA compatible)

  • Dedicated network processor

Storage and Security

• Storage

  • 512KB SRAM

  • QSPI NOR Flash

  • DQ8/DQ16 DDR PSRAM

• Security

  • Armv8.1 TrustZone®-M

  • TRNG

  • AES/SHA

  • ECC/RSA

  • JTAG/SWD password protection

Wireless

• Wi-Fi 6 Dual-Band

• Wi-Fi Dolby Atmos Solution

• Wi-Fi R-Mesh 👉

• Wi-Fi Card Mode 👉

• BLE 5.0

• BLE Mesh 1.1 long Range

Ultra-Low Power

• Sleep Mode

  • WoWLAN DTIM=10: 130~145µA

  • Wi-Fi OFF: 90µA

• Deep-Sleep Mode: 11µA

More

• Display

  • Pixel Processing Engine

  • LCDC display interface

  • MJPEG Decoder

• Audio

  • DMIC/I2S

• USB 2.0: Host and Device

• SDIO host: SDIO Device/ SD card/eMMC

Resources

• Datasheet

• Hardware Design Guide

• PCB Design Guide

• HDK

• EVB User Guide

• Pinmux

• Tools

Product Comparison

Part number	Real-M300 (KM4TZ)	Real-M300 (KM4NS)	On-chip SRAM	TrustZone	Flash	PSRAM	Wi-Fi	Bluetooth	Operating voltage	Operating temperature	Package (mm)
RTL8721FAF-VA2-CG	334MHz	334MHz	512KB	Y	4MB	X	Wi-Fi 6 (2.4GHz + 5GHz)	Bluetooth 5.0 LE	2.97V ~ 3.63V	-20°C ~ 85°C	QFN48 (6 x 6)
RTL8721FAF-VT2-CG	334MHz	334MHz	512KB	Y	4MB	X	Wi-Fi 6 (2.4GHz + 5GHz)	Bluetooth 5.0 LE	2.97V ~ 3.63V	-40°C ~ 105°C	QFN48 (6 x 6)
RTL8721FAM-VA2-CG	334MHz	334MHz	512KB	Y	X	4MB	Wi-Fi 6 (2.4GHz + 5GHz)	Bluetooth 5.0 LE	2.97V ~ 3.63V	-20°C ~ 85°C	QFN48 (6 x 6)
RTL8721FAM-VT2-CG	334MHz	334MHz	512KB	Y	X	4MB	Wi-Fi 6 (2.4GHz + 5GHz)	Bluetooth 5.0 LE	2.97V ~ 3.63V	-40°C ~ 105°C	QFN48 (6 x 6)
RTL8721FCM-VA2-CG	334MHz	334MHz	512KB	Y	X	4MB	Wi-Fi 6 (2.4GHz + 5GHz)	Bluetooth 5.0 LE	2.97V ~ 3.63V	-20°C ~ 85°C	QFN68 (8 x 8)
RTL8721FCM-VA3-CG	334MHz	334MHz	512KB	Y	X	8MB	Wi-Fi 6 (2.4GHz + 5GHz)	Bluetooth 5.0 LE	2.97V ~ 3.63V	-20°C ~ 85°C	QFN68 (8 x 8)
RTL8721FLM-VA4-CG	334MHz	334MHz	512KB	Y	X	16MB	Wi-Fi 6 (2.4GHz + 5GHz)	Bluetooth 5.0 LE	2.97V ~ 3.63V	-20°C ~ 85°C	QFN100 (10 x 10)

Block Diagram

Core Architecture

• Real-M300 (KM4TZ)

  • Armv8.1-M architecture (Arm® Cortex®-M55 ISA compatible)

  • Up to 334MHz, 3-stage pipeline

  • 16KB 4-way I-Cache + 16KB 4-way D-Cache

  • Hardware-enforced isolation via TrustZone®-M

• Real-M300 (KM4NS)

  • Armv8.1-M architecture (Arm® Cortex®-M55 ISA compatible)

  • Up to 334MHz, 3-stage pipeline

  • 16KB 4-way I-Cache + 16KB 4-way D-Cache

Memory System

• On-chip memory: 512KB SRAM

• External memory (including KGD):

  • QSPI NOR Flash (up to 104MHz)

  • DQ8/DQ16 DDR PSRAM (up to 200MHz)

• Bus architecture: Multi-layer AXI bus with parallel access

Peripheral Interfaces

• Flexible design of GPIO configuration

• Multi-communication interfaces: SPI x 2, UART x 5, I2C x 2, I2C-like x 1

• Hardware IR transceiver, easy to adapt to various IR protocols

• Supports Real-Time Clock timer together with 4 basic timers

• Supports 4 channels of PWM timer and 1 capture timer

• Supports 2 group PMC timers

• Supports a general 12-bit ADC: 8 external channels and 4 internal channels

• Supports 9 channels of touch pad

• Supports 8 independent channels of GDMA

• Supports USB 2.0 full-speed Host/Device mode

• Supports SDIO Host/Device with 1-bit and 4-bit mode

• Supports SD host controller to access SD card and eMMC device

• Integrated Pixel Processing Engine (PPE) to process pixel data faster

• LCDC

• MJPEG

• A2C

• Ethernet MAC

• Integrated audio codec supports 2 channels DMIC interface

• I2S x 2: up to 384kHz sampling rate

• Supports thermal detector to detect and monitor the real-time temperature inside the chip

Security Features

• Secure boot

• Arm TrustZone-M security architecture

• True Random Number Generator (TRNG)

• Hardware encryption engine (AES/SHA)

• Public Key Engine（ECC/RSA）

• Flash full-disk/partition encryption

• Read Protection (RDP) mechanism

• JTAG/SWD password protection

• 2KB OTP memory (2K bits available for user)

Wireless Connectivity

• Wi-Fi 6 (802.11 a/b/g/n/ac/ax)

  • 1T1R, 2.4GHz/5GHz dual-band

  • 20MHz channel bandwidth, MCS0 ~ MCS9 modulation

  • Antenna diversity

  • WoWLAN power saving:

• Bluetooth 5.0 LE

  • LE Coded PHY long-range mode (125kbps/500kbps)

• Scatternet: 8 masters + 3 slaves

• Tx Power: -10dBm ~ +10dBm (typical 8dBm)

• Rx sensitivity: -99dBm@1Mbps

Power Management

• Dynamic voltage/frequency scaling (2.97V ~ 3.63V)

• Power modes:

  • Active mode: Full operation (334MHz)

• Sleep mode: Peripherals or Wi-Fi can wake up the system (<100uA)

• Deep-Sleep mode: 13.9µA (3.3V, 25°C)

Package and Reliability

• QFN48 package: 6mm x 6mm

• QFN68 package: 8mm x 8mm

• QFN100 package: 10mm x 10mm

• Operating voltage:

  • Standard voltage: 2.97V ~ 3.63V

• Operating temperature:

  • Standard temperature: -20°C ~ 85°C

  • Wide-range temperature: -40°C ~ 105°C

• ESD protection: HBM ±3.5kV

• Smart home appliance

• Line controller

• Smart door lock

• Battery camera

• Smart remote controller

• Wi-Fi speaker

• Wi-Fi Card Mode

• BLE gateway

• Smart POS