RK3308-CC - Quad-Core A35 1.3GHz AIoT Main Board | Rockchip
部品番号: RK3308-CC ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $41.9 | $41.90 |
| 10 | $38.5 | $385.00 |
| 100 | $34.2 | $3,420.00 |
| 500 | $30.1 | $15,050.00 |
| 1,000 | $26.8 | $26,800.00 |
RK3308-CC 概要
An AIoT open-source main board (ROC form factor) is a credit-card-sized single-board computer built around an integrated application processor, designed to host AI/ML inference, microphone-array audio front-end, and IoT connectivity simultaneously - it is essentially the compute platform that turns a smart-speaker, voice-controlled appliance, or industrial gateway concept into a working prototype without requiring a custom baseboard. In the broader taxonomy it sits between a microcontroller development board and a Linux SBC, sharing the open-source Linux ecosystem of the latter while targeting power-constrained always-listening voice endpoints of the former.
Key features include four Cortex-A35 cores in a high-efficiency big.LITTLE-less cluster, dedicated microphone-array PDM/I2S interfaces capable of driving up to 6 digital MEMS microphones, integrated VAD for sub-1 W standby voice wake, and Linux/Android SDK support. The board exposes 1 USB 2.0 OTG, 1 USB 2.0 HOST, 1 SDIO 3.0, 1 SPI, 1 I2C, 1 UART debug console, 1 GbE via the RTL8211F PHY, and on-board 2.4 GHz Wi-Fi plus optional Bluetooth 4.2 via the RTL8723DS module.
The SoC uses TSMC 28 nm HPC process technology and Rockchip's third-generation power-management architecture, achieving deep-sleep current in the low single-digit mA range while keeping wake word latency under 100 ms. The Cortex-A35 core is the most power-efficient 64-bit ARM Cortex-A class implementation in this performance tier, and the embedded VAD removes the need for an external audio DSP in many voice-front-end designs.
Typical applications include smart speakers and soundbars with always-listening voice wake, AI voice-controlled appliances and white goods, six-microphone array conferencing systems, industrial voice-controlled HMIs, and Linux-based IoT gateways with on-board keyword spotting. Smart-audio OEMs in particular value the integrated CODEC plus VAD combination that simplifies BOM and shortens time-to-market.
When designing with this board, match the power-supply current capability to the peak Wi-Fi transmit budget, not just the SoC load, to avoid brownout during burst transmissions. Confirm microphone-array routing against the datasheet PDM/I2S pin map since the on-board 6-mic expansion is optional.
This page synthesizes distributor availability, drop-in alternatives, and practical design notes for the ROC-RK3308-CC open-source main board that are not aggregated in the official Rockchip RK3308 datasheet alone.
ドロップイン代替品: RK3308-CC — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
ROC-RK3308B-CC-PLUS
✅ ドロップイン📋 参考代替品（カタログ未掲載）
Radxa rCore-RK3308
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DSOM-050
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ROC-RK3399-PC
✅ ドロップイン📋 参考代替品（カタログ未掲載）
RK3308-CC 仕様（メーカー公開）
| Processor | Rockchip RK3308, 64-bit Quad-Core ARM Cortex-A35 |
| Maximum CPU Frequency | 1.3 GHz |
| Manufacturing Process | 28 nm HPC |
| On-board RAM Options | 256 MB / 512 MB / 1 GB DDR3 |
| On-board Storage Options | 4 GB / 8 GB / 16 GB eMMC |
| Integrated Audio CODEC | Yes, high-performance stereo CODEC |
| Hardware VAD | Yes, embedded Voice Activity Detection |
| Audio Interfaces | PDM, I2S, microphone array up to 6 digital mics |
| USB Ports | 1x USB 2.0 OTG, 1x USB 2.0 HOST |
| Network | 1x 10/100/1000 Mbps Ethernet (RTL8211F), 2.4 GHz Wi-Fi |
| Bluetooth | 4.2 (via RTL8723DS module, optional) |
| Expansion Interfaces | SDIO 3.0, SPI, I2C, UART debug |
| Board Dimensions | 60 mm x 45 mm (ROC form factor) |
| Operating System Support | Linux, Android, Buildroot |
| Cooling | Passive (no heatsink required) |
| RoHS ステータス | Compliant |
RK3308-CC インターフェースとコネクタ
RK3308-CC は、メーカーが公開している以下のインターフェースとコネクタを備えています: USB, Bluetooth。拡張ヘッダーのピン配置、コネクタのピン番号、電気的制限はメーカーのドキュメントで定義されています。
| USB | 1x USB 2.0 OTG, 1x USB 2.0 HOST |
| Bluetooth | 4.2 (via RTL8723DS module, optional) |
詳細は メーカー資料 をご参照ください（拡張ヘッダーのピン配置とコネクタのピン番号の詳細）。
電力・熱特性
| 冷却 | Passive (no heatsink required) |
メーカーが公開している RK3308-CC の電力入力および熱パラメータ。
主な用途
RK3308-CC の用途: 7 件s: Smart Speaker / Voice Assistant Endpoint, AI Voice-Controlled Appliance (White Goods), Six-Microphone Far-Field Conferencing System, Industrial Voice-Controlled HMI, Linux IoT Gateway with On-Device Wake Word, Smart Audio / Soundbar Processing Engine, Educational / Maker Voice-AI Development Board.
Smart Speaker / Voice Assistant Endpoint
The RK3308-CC is purpose-built for smart-speaker reference designs that need always-listening voice wake with offline keyword spotting. The Rockchip RK3308 SoC integrates a hardware VAD that watches the microphone-array input while the four Cortex-A35 cores stay parked at low frequency, reducing standby power well below 1 W while keeping wake-word latency under 100 ms. The integrated high-performance CODEC removes an external audio DAC from the BOM and the on-board 6-mic array expansion mates directly with the PDM/I2S pins, which is why smart-speaker OEMs seed designs on this board. Use the AK09911 / ICS-43432 digital MEMS mics from the Seeed Studio 6-mic array expansion for a drop-in front end.
おすすめ
AI Voice-Controlled Appliance (White Goods)
Voice-controlled washing machines, ovens, and HVAC controllers benefit from the RK3308-CC's combination of quad-core Cortex-A35 compute for on-device speech recognition, hardware VAD for sub-1 W standby, and ROC form factor that drops into existing appliance control boards. The 1.3 GHz Cortex-A35 cluster runs lightweight CNN/RNN wake-word and intent models locally, eliminating cloud-round-trip latency for command-response loops. Connect to the appliance's existing MCU over UART; the 1 GbE plus Wi-Fi/BT gives both wired backhaul and BLE provisioning paths for service technicians. Pair with Seeed Studio's PoE expansion if the appliance chassis is already wired for Ethernet.
おすすめ
Six-Microphone Far-Field Conferencing System
Boardroom and huddle-space conference systems need beam-forming microphone arrays with on-board audio processing, exactly the workload the RK3308-CC was designed for. The four Cortex-A35 cores run beam-former, AEC, and noise-suppression algorithms in real time on the 6-mic PDM input, while the integrated CODEC handles line-echo cancellation paths. The gigabit Ethernet port streams the cleaned-up far-end signal directly to a USB-attached host PC for soft-client integration. Configure the system with the Seeed Studio 6-mic array board (12 tri-color LEDs + 5 keys) for mute/volume/zoom controls - this is the BOM recommended in the Mouser product overview.
おすすめ
Industrial Voice-Controlled HMI
Factory-floor and warehouse voice-HMI panels let operators request inventory, log incidents, and query machine status hands-free while wearing gloves - a use case where the RK3308-CC's industrial temperature tolerance, on-board gigabit Ethernet, and quiet passive cooling (no fan needed) fit well. The hardware VAD keeps the panel in sub-1 W standby continuously, and the four Cortex-A35 cores wake in under 100 ms to run speech-to-intent on the Linux SDK. Connect to the PLC over RS-485 via the UART debug port with a transceiver, and to the factory network over the on-board GbE. The ROC form factor allows a unified baseboard design across multiple SKUs.
おすすめ
Linux IoT Gateway with On-Device Wake Word
Edge IoT gateways aggregate sensor data and bridge local protocols (Zigbee, BLE, Modbus, RS-485) into MQTT/HTTPS cloud uplinks, often also accepting voice commands from operators. The RK3308-CC fits the gateway role with its 1 GbE Ethernet, 2.4 GHz Wi-Fi, optional Bluetooth 4.2, and the Cortex-A35 cluster that runs Linux containers (Docker via Buildroot). Adding on-device wake-word detection on the hardware VAD avoids streaming raw audio to the cloud, addressing privacy and bandwidth concerns common in deployments. Edge ML inference (anomaly detection, simple NLP) runs locally while the cloud only sees the structured intent payload.
おすすめ
Smart Audio / Soundbar Processing Engine
Soundbars and smart audio amplifiers that need multi-channel decoding, DRC, and room-correction algorithms benefit from the RK3308-CC's high-performance stereo CODEC and quad-core compute headroom. Drive the on-board CODEC from HDMI ARC or optical S/PDIF inputs (via companion transceiver MPNs on the expansion header), and run post-processing on the Cortex-A35 cores at sub-50 ms latency. Pin-compatibility with the ROC form factor means audio OEMs can re-use the same carrier board across the soundbar SKU and the smart-speaker SKU, simplifying manufacturing. The 1 GB DDR3 variant is recommended for room-correction filter tables in premium SKU designs.
おすすめ
Educational / Maker Voice-AI Development Board
Universities, makerspaces, and bootcamps teaching voice-AI and embedded Linux use the RK3308-CC as a development platform because it combines a real Linux environment (full kernel, Buildroot, mainline support) with audio-array interfaces at a price point accessible to students. The ROC form factor plus 6-mic array expansion makes lecture-hall demos reproducible, while Linux/Android SDK support lets the same board cover both firmware (real-time audio) and application-layer (intent recognition) coursework. The T-Chip / Seeed Studio open-source repositories provide schematics, Gerbers, and reference Buildroot configs that students can fork for capstone projects.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: RK3308-CC — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ROC-RK3308B-CC-PLUS | Radxa rCore-RK3308 | DSOM-050 | ROC-RK3399-PC |
|---|---|---|---|---|---|
| Brand | Rockchip (T-Chip / Seeed Studio main board) | Rockchip (Firefly main board) | Radxa (SoM) | Dusun IoT (SoM) | Rockchip (main board, higher tier) |
| Form Factor | ROC 60 mm x 45 mm main board | ROC 60 mm x 45 mm main board | SoM 35 mm x 35 mm | SoM stamp | ROC 60 mm x 45 mm main board |
| SoC | Rockchip RK3308 Quad-Core Cortex-A35 @ 1.3 GHz | Rockchip RK3308B Quad-Core Cortex-A35 @ 1.3 GHz | Rockchip RK3308B Quad-Core Cortex-A35 @ 1.3 GHz | Rockchip RK3308 Quad-Core Cortex-A35 @ 1.3 GHz | Rockchip RK3399 Dual A72 + Quad A53 |
| Hardware VAD | Yes (embedded Voice Activity Detection) | Yes | Yes | Yes | No (higher tier, VAD via software) |
| Maximum RAM | 1 GB DDR3 | 1 GB DDR3 | Up to 512 MB DDR3 (varies by SKU) | DDR3 / DDR3L (varies by SKU) | Up to 4 GB LPDDR4 |
| Wi-Fi | 2.4 GHz (on-board) | 2.4 GHz (on-board) | 2.4 GHz integrated | Optional via carrier board | 2.4/5 GHz (on-board) |
| Gigabit Ethernet | Yes (RTL8211F) | Yes | Yes (on dev baseboard) | Via carrier | Yes (RTL8211F) |
| Integrated Audio CODEC | Yes (high-performance stereo) | Yes | Yes | Yes | Yes |
| Target Application | Smart audio / voice-AI / IoT gateways | Same / expanded storage | Embedded SoM / general IoT | General IoT SoM | Higher-tier SBC / multimedia |
主な差別化要因
- Integrated hardware VAD keeps standby power under 1 W with sub-100 ms wake latency （vs ROC-RK3399-PC)
- Open-source ROC form factor with verified 6-mic array and PoE expansion ecosystem （vs Radxa rCore-RK3308)
- Linux mainline kernel and Buildroot support out of the box （vs DSOM-050)
設計ノート
The RK3308-CC board power input is typically 5 V via the USB Type-C OTG port; budget at least 2 A peak to cover Wi-Fi transmit bursts plus the Cortex-A35 cores, since simultaneous Wi-Fi TX at 1 Mbps and full CPU load can pull 1.3-1.5 A steady with transient peaks exceeding 2 A. Use the optional PoE expansion board for ceiling-mount installations where AC power is impractical - the PoE input is 802.3af-compatible (Class 3, ~13 W budget). Estimated worst-case input current based on RK3308 SoC power + Wi-Fi radio + GbE PHY operation; consult the Firefly Wiki main board schematic for the exact regulator current limits before finalizing the BOM.
The RK3308-CC ships with passive cooling only and uses the ROC form factor's PCB copper pour as the primary heat spreader for the RK3308 SoC. In enclosed plastic enclosures with restricted airflow, add a small adhesive heatsink on the RK3308 package and ensure the enclosure vents allow natural convection; in fan-less metal chassis, derate ambient to 50 C maximum. The Cortex-A35 quad-core at 1.3 GHz dissipates well under 3 W continuous, so thermal failures are rare - they typically indicate an upstream regulator failure, not overheating. Verify with a temperature probe at SoC package after 30 minutes of stress test.
When integrating the RK3308-CC into a custom product, the on-board 6-mic array expansion connector carries PDM clock + data lines with strict length matching of ±0.5 mm - keep the routing from the expansion connector to the SoC as short as possible and avoid stubs. The GbE signals run to the RTL8211F PHY; the 1000BASE-T differential pairs must maintain 100 ohm differential impedance. Place the optional Wi-Fi/BT antenna at least 5 mm away from any metal enclosure wall and clear of the 6-mic array to avoid RF interference with the MEMS microphone clocks. These notes are estimated practical guidance derived from the ROC pinout and standard ROC form-factor reference designs.
Do not mix up the USB 2.0 OTG (device mode firmware flashing) and USB 2.0 HOST (Type-A peripheral) ports during bring-up - the OTG port is the one used for flashing via Rockchip's rkdevelop tool. The on-board RTL8723DS Bluetooth module is optional, so verify it is populated before relying on BLE provisioning. Finally, ensure the eMMC firmware image includes the correct device-tree blob for the on-board RTL8211F GbE PHY, otherwise the kernel will fall back to the internal MAC and the GbE port will be dead at first boot.
コンプライアンス情報
RoHS compliance per Seeed Studio product page. Not AEC-Q100 qualified (consumer IoT board, not automotive). Lead-free manufacturing; halogen-free and conflict-mineral declarations not explicitly stated on verified sources.