In the field of testing and measurement, the development of instrument bus technology has always been a major concern for engineers and scientists. From the GPIB bus introduced in the 1960s specifically for instrument control, to the widely used USB, VXI, PXI, and the latest LXI and PXI Express, the emergence of new bus technologies … Read more
Previously, we discussed the on-chip interconnect bus, but having just the bus is not enough; we also need on-chip bus protocol support. Only with the protocol can we operate the registers accurately. When it comes to on-chip bus protocols, there are many, such as the AMBA bus used by ARM, the Wishbone bus by Silicore, … Read more
1 8-Bit/16-Bit Bus Timing Analysis 1.1 8-Bit Microcontroller Bus Timing There are many 8-bit microcontrollers with external buses, such as the 51 series and AVR series. This article takes the W77E58 as an example. The W77E58 is an enhanced 51 microcontroller introduced by Winbond, with a maximum operating clock of 40 MHz. At the same … Read more
Bus System refers to all device nodes, such as zone modules and alarm devices, being connected to two communication lines. Regardless of how many devices there are, they can share these communication lines. Branch System means that all connected devices must use independent communication lines to connect to the host. For example: When an alarm … Read more
[Abstract] The 485 bus is often used in the wiring of common access control systems, but most people do not understand it. Below, the editor will discuss the 485 bus protocol and the related knowledge of the 485 bus transmission distance. 485 Bus Protocol 485 Bus Protocol When the communication distance is required to be… … Read more
CAN bus (Controller Area Network) is a serial multi-master controller area network bus, primarily designed to connect various controllers in a vehicle, enabling communication between the engine controller, transmission controller, ABS controller, body controller, instrument panel, and other controllers. The CAN bus system not only reduces the number of wiring harnesses in the vehicle, making … Read more
A certain shopping mall has set up a fire automatic alarm system, where the 2# loop bus of the fire alarm controller is shared by two fire compartments on the first floor. Fire compartment one has 30 smoke fire detectors, 10 manual fire alarm buttons, and 10 bus modules (2 inputs and 2 outputs); fire … Read more
Today, I bring you the design of a CAN bus controller based on FPGA. Due to the lengthy content, it is divided into three parts. Today, I present the third part, followed by the next one, which covers the program simulation and testing, as well as a summary. Without further ado, let’s get started. I … Read more
LIN is a subnet of the CAN bus system, also known as a “local subsystem.” Data exchange between all systems controlled by the LIN bus in automobiles must be achieved through the CAN bus control unit. As a beneficial supplement to the CAN bus, the LIN bus can complete vehicle functions more economically and effectively. … Read more
As the demand for features increases and the requirements for driving comfort rise, the number of electronic components used in cars has also increased. This leads to the need for new transmission channels for data transfer between various control units. Function of the Data Bus The automotive data bus enables safe, reliable, and fast data … Read more