# cortex-m33

Published articles for cortex-m33.

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## Realtek RTL8773J - A Bluetooth 7-ready Cortex-M55/M33 microcontroller with HDT support

DevFeed: [Realtek RTL8773J - A Bluetooth 7-ready Cortex-M55/M33 microcontroller with HDT support](<https://devfeed.tech/articles/realtek-rtl8773j-a-bluetooth-7-ready-cortex-m55-m33-microcontroller-with-hdt-support-57490.md>)

Original publisher: [Read original article](<https://www.cnx-software.com/2026/09/21/realtek-rtl8773j-a-bluetooth-7-ready-cortex-m55-m33-microcontroller-with-hdt-support/>)

Author: Jean-Luc Aufranc (CNXSoft)

Published: 2026-09-21T09:00:32Z

Content type: news

Language: en

Sources: [CNX Software - Embedded Systems News](<https://devfeed.tech/sources/cnx-software-embedded-systems-news.md>)

Topics: [Microcontroller](<https://devfeed.tech/topics/microcontroller.md>), [Bluetooth](<https://devfeed.tech/topics/bluetooth.md>), [Embedded Systems](<https://devfeed.tech/topics/embedded-systems.md>), [Embedded Software Dev](<https://devfeed.tech/topics/embedded-software-dev.md>)

Tags: [adc](<https://devfeed.tech/tags/adc.md>), [aes](<https://devfeed.tech/tags/aes.md>), [audio](<https://devfeed.tech/tags/audio.md>), [battery](<https://devfeed.tech/tags/battery.md>), [bluetooth](<https://devfeed.tech/tags/bluetooth.md>), [chip](<https://devfeed.tech/tags/chip.md>), [core](<https://devfeed.tech/tags/core.md>), [cortex-m33](<https://devfeed.tech/tags/cortex-m33.md>), [cortex-m55](<https://devfeed.tech/tags/cortex-m55.md>), [dsp](<https://devfeed.tech/tags/dsp.md>), [edge-ai](<https://devfeed.tech/tags/edge-ai.md>), [embedded](<https://devfeed.tech/tags/embedded.md>), [embedded-systems](<https://devfeed.tech/tags/embedded-systems.md>), [fft](<https://devfeed.tech/tags/fft.md>), [firmware](<https://devfeed.tech/tags/firmware.md>), [flash](<https://devfeed.tech/tags/flash.md>), [flash-memory](<https://devfeed.tech/tags/flash-memory.md>), [mcu](<https://devfeed.tech/tags/mcu.md>), [memory](<https://devfeed.tech/tags/memory.md>), [microcontroller](<https://devfeed.tech/tags/microcontroller.md>), [realtek](<https://devfeed.tech/tags/realtek.md>), [realtek-rtl](<https://devfeed.tech/tags/realtek-rtl.md>), [software](<https://devfeed.tech/tags/software.md>), [wireless](<https://devfeed.tech/tags/wireless.md>)

### AI overview

CNX Software reports on Realtek's RTL8773J microcontroller family, featuring dual Arm Cortex-M55 and Cortex-M33 cores, DSPs, embedded memory, Bluetooth 6.2 and pre-ratification Bluetooth 7 features, audio support, and multiple peripheral interfaces. Its High Data Throughput implementation is described as supporting claimed data rates up to 15 Mbps.

### Source excerpt

Realtek RTL8773J Series is the first Bluetooth 7-ready microcontroller family we've seen so far. It features a dual-core design with a 200 MHz Cortex-M55 application core and a Cortex-M33 sensor and network core, along with DSPs for high-fidelity codec processing and an accelerator for ANC, Talk Clear, and Keyword Spotting. Other features include up to 2MB SRAM, 8MB PSRAM, 16MB flash on-chip, Bluetooth 6.2/7 and 2.4 GHz proprietary, audio features, and a range of I/Os. The main feature of the upcoming Bluetooth 7 release will be High Data Throughput (HDT), delivering up to 7.5 Mbps data link over Bluetooth. Realtek has developed a custom version (Realtek HDT+) with claims of up to 15 Mbps data rates. Realtek RTL8773J specifications: MCU cores Arm Cortex-M55 application core with MVE up to 200MHz Arm Cortex-M33 sensor and network core DSP Dual-core DSP HiFi 1s up to 400MHz HW FFT engine Memory Up to [...] The post Realtek RTL8773J - A Bluetooth 7-ready Cortex-M55/M33 microcontroller with HDT support appeared first on CNX Software - Embedded Systems News.