IC660TBD025 | GE | Main station input signalmodule

Description

IC660TBD025 | GE | Main station input signalmodule

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IC660TBD025 : SCK, MISO, and MOSI are respectively the clock signal, main station input signal, and main station output signal of the SPI interface. The SPI interface of STC12 is defined to work in a slave mode, with STC11 serving as the SPI master. Due to the lack of SPI function in the STC11 microcontroller, software must be used to simulate the SPI master station function. Here, STC11 is only used as a transfer station for byte data transmission, without verifying, storing, and converting information frames.

The monitoring IC660TBD025  sends instructions that are received through the serial port of STC11 and sent to STC12 for processing through SPI. STC11 then receives the return information through SPI and sends it to the monitoring computer through a serial port. In the design, STC12 informs STC11 to start the analog SPI master station function by reading a byte of data from the SPI interface register of STC12 at the output falling edge of the SPI-TX pin.

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