Technical white paper describing Loongson high‑quality CPUs, their specifications, solutions and ecosystem.
The Loongson Technical White Paper (2020‑08) from Loongson Technology Co., Ltd. presents an overview of the company, its mission, and the development history of the Loongson CPU family. It details the high‑quality grade chips recommended for special‑purpose fields and the corresponding solution architectures.
The document then lists the technical specifications of the featured chips (3A3500‑J, 7A1000‑J, 2K1000‑J, 2J1500, 1A500‑J), describes the associated bridge chips and system modules, and outlines the software ecosystem, including Linux, drivers, and firmware standards. Appendices provide quality‑level classifications and testing procedures. This manual is written in Chinese.
| Main frequency (3A3500‑J) | 1.2 GHz |
|---|---|
| Core voltage (3A3500‑J) | 1.05 V |
| Operating temperature range (high‑quality chips) | -55 °C to +125 °C |
| Package size (3A3500‑J) | 37.5 mm × 37.5 mm (CCGA1211) |
| Typical power consumption (3A3500‑J) | ≈15 W normal, >20 W high‑temp |
| Typical power consumption (7A1000‑J) | ≤6 W normal |
The 3A3500‑J runs at 1.2 GHz with a core voltage of 1.05 V.
They are rated for operation from –55 °C up to +125 °C.