Extending MIPI Signal Cable Length
Aug 14,2024Cable length of MIPI camera is always an issue in real application. Herewith, we want to share some experience with customer. First of all, we need to understand a bit of MIPI standard, we attach at the end of this essay some info which is abstracted from some technical articles, for information. From our expereice, impedance of cable is important, shielding of twist pair cable is also important. I do believe people knows PCB layout for these signal path is critical but people may not know the shorter the openings…
Guide to Selecting C8203 and C8209
Aug 12,2024C8203 and C8209 are two main back end module to interface micro cameras from COMedia. C8203 has been designed to output HDMI signal and connect to HD monitor for video display. C8209 is for PC connection thru USB port. They are able to connect different sensor and LED configuration, therefore we have assigned different part number for it. Below is a detail list. C8203D/M/H C8209D/M/H For D suffix， there is a chip OV426 on the board. For H suffix, there is a chip OV428 on the board. For M suffix,…
C8209 vs C8262: Features Comparison
Aug 09,2024C8262 and C8209 are the backend module to interface muC103 (OVM6946) and connect to PC thru USB port for video display. C8262 is our 1st generation USB VPU and C8209 is our 2nd generation VPU. Here is the difference between the 2 modules. LED C8262 does not provide LED control circuit, users need to build their own LED circuits. C8209 board has been integrated with LED control circuit. C8209DP support up to 300mA current for external LED use, C8209DL and C8209ML support small LED on the camera tip. USB Connector…
Implementation uvc extension unit function to control C8209DM
Aug 07,2024The Extension Unit is a method provided by the UVC specification to add vendor-specific building blocks to the specification.The USB Video Class specification defines a mechanism to extend the functionality of devices that comply with that specification and describes the behavior of Extension Units. Independent hardware vendors (IHVs) can enhance the value of their devices by adding functionality that goes beyond that described in the specification. This extension mechanism requires operating system support and some user-mode plug-ins so that applications can work with these extensions. The USB Video Class driver architecture provides…
OV426 vs OAH0428: A Comparison of Medical Image Sensor Solutions
Aug 07,2024Both OV426 and OAH0428 are used in our back end modules. The OV426 is a single chip solution for small medical image sensors like the OV6946 and OV6948. The OV426 provides an integrated analog-to-digital data conversion using a built-in A/D converter (ADC), black level calibration (BLC), AEC/AGC and a final digital video parallel output (DVP). The OV426 supports a standard SCCB interface to communicate with the system and manipulate the above mentioned functions. OAH0428 is a single companion chip solution that provides an integrated analog to digital conversion and limited ISP functionality including…