Author Archives: allaismt

The basic steps of led manufacturing: welding-self-inspection-mutual inspection-cleaning-rubbing. Here’s a small series to give you a detailed introduction. 1. welding of led circuit board ① Judging the direction of the lamp: the front is facing upwards, and the side where the black rectangle is located is the negative end; ② The direction of the circuit […]

There are several treatment processes for the surface of LED circuit board: smooth board (without any treatment on the surface), rosin board, OSP (organic solder protective agent, slightly better than rosin), tin spraying (lead-tin and lead-free tin), gold-plated board, gold-deposited board, etc. These are more noticeable. Difference between gold deposition process and gold plating process […]

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 […]

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 […]

There are two kinds of SRAM in Loongson chip: one is CPUSRAM； which is closely related to microprocessor (data, code memory); The other is HDCSRAM used for hard disk control, which can’t be read directly by microcontroller, and is a dual-port SRAM. Both of them choose different testing strategies. Test strategy of CPUSRAM Like the […]

The chips designed by HiSilicon cover a wide range, including wifi networks, fixed networks, digital media and other fields, but the most concerned and highly concerned ones are processor chips, including mobile phone processor SoC, server chips and its AI chips. On the technical level and threshold, the mobile phone with processor is obviously the […]

Loongson 2H core board is an electronic device computer motherboard that packs the core functions of MINIPC. Most of the core boards are integrated with CPU, storage devices and pins, which are connected with the base plate of supporting facilities according to the pins to complete a system chip in a certain field. People often […]

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. […]

“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 […]