Category Archives: Uncategorized

Radio frequency circuit (RF) is called “black art” because of many uncertain factors. However, through practice and exploration, we will find that there are rules to follow. Based on our many years’ working practice and previous experience, we will discuss the circuit board design of RF circuit around these aspects: layout, impedance, lamination, design considerations, […]

The order of wiring design of printed circuit boards in the factory may be different. Before the wiring designer in the factory prepares to design the wiring, it should be clearly specified in his circuit design rules. Today, the circuit board factory tells you the order of wiring design. It is the responsibility of the […]

USB3.0 can provide a data rate of up to 5Gbps, which is ten times faster than high-speed USB(USB2.0) and has improved power efficiency. At this high transmission speed, the signal integrity problem restricts the PCB routing and wiring length and its design and implementation function more and more strictly. Poor signal quality may seriously affect […]

Hai Hi2115NB-IOT chip: Hi2115 is a system-on-a-chip (SoC) that works at cellular frequency. It uses an on-chip application processor with integrated memory to support small-footprint IoT applications, and can also communicate with external MCU through various digital interfaces. Hi2115 can work in the frequency range of 698~960MHz and 1695~2180MHz, and the system bandwidth is 200kHz. […]

The domestic operating system UOS was officially released not long ago, while the domestic new generation processor was officially released in December 2019. Recently, the official document introduced its product features and new features. As one of the representatives of “China Core”, Loongson released a new generation of general-purpose processors (CPUs) independently developed, which greatly […]

“Open Source Godson Motherboard” is a Godson embedded motherboard developed by Godson Club and Godson in an open source way. It integrates Godson 1CSOC, network port, USB port, power supply, SD card slot, RTC clock and other main components on a small circuit board with the same specifications as “Raspberry Pi”. It can run embedded […]

Loongson (English: Loongson, formerly known as GODSON) is a general CPU designed by Hu Weiwu, Institute of Computing Technology, Chinese Academy of Sciences, etc. It adopts MIPS and LoongISA® reduced instruction set architecture, and buys out the MIPS instruction set patent. Godson-1 series are embedded domain chips, which have been used by many enterprises. The […]

1. Brief introduction, blind holes and embedded fillers are mainly made of high-density and small microplates. Purpose depends on saving circuit space, so as to reduce PCB volume, such as mobile phone board. Second, classification: 1). Laser drilling, 1. the reason for drilling with laser: a. customer data requires drilling with laser; B because the […]

Loongson Zhongke released ——2K1000, the smallest industrial system solution produced in China, which is suitable for application scenarios such as Internet of Things and independent controllable industrial security system. In this scheme, the domestic Godson 2K1000 processor is adopted, the surface-mounted DDR3 2GB domestic memory is used, the maximum surface-mounted 2GB NAND FLASH is stored, […]

The introduction of Loongson 3A2000 processor, which is “Loongson 3A3000/3B3000 is the latest upgraded product of Loongson 3 series processors. Based on the design of Loongson 3A2000, Loongson 3A3000 has made a few structural improvements, such as increasing the number of key queue entries of processor cores, expanding on-chip private/shared cache capacity, etc., which is […]