hi i have attached the my project on single board computer (SBC) schematic and block diagram.
the details of the SBC is explained as below:
Objective is to design and develop an application specific Single Board Computer (SBC). The major task is to monitor and control the various sub modules present in the MPM, at the same time it has to communicate with the SARWAGNA Master Controller (SMC) by sending status of the MPM and receiving the commands through a serial communication link. It behaves like a line front end communication module which can support multiple communication protocols like RS485/CAN/ ETHERNET etc.
The communication with SMC can be done by three different protocols.
1. Rs485.
2. CAN protocol
3. Ethernet protocol.
Microcontroller: In the proposed design we are going to use a low end microcontroller since this SBC is not performing any complex functions. The main task of the controller is to act as a communication interface between different protocols. Along with that it has to read the temperature sensor output for the temperature measurement and the IREM output to detect the presence of RF in TWT output.
CAN transceiver: The CAN bus is a balanced (differential) 2-wire interface which will be converting the single ended signal into differential signal for transmission and differential to single ended for reception.
Buffers: All the signals which are input and output from the surge board are passed through a buffer before passing it to the microcontroller.
Optocoupler: These are the digital optocoupler which are used for providing the isolation between the EPC board and the SBC.
LED Indications: These are used for the indicating the RX, TX, UART line status by blinking the LED's. An optional feature is provided to indicate the modes of operation of the MPM.
please go though the schematic and guide me to improve or correct my mistakes.
thank you...