Single data line for chip to chip com

Projects Networking, Protocols, and Devices
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Hello

Are there any examples / diagrams available for sending and receiving sync serial data over one data line? I have a chip that accepts up to 10MHz clock and includes a chip select and a single data line.

Thanks for any info!

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You may only need a single data line but you also need a common GND connection

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hi thanks I meant from an Aurduino UNO minima - The chip and the Aurduino share the same common ground. The chip I am interfacing with includes three signals CLK , DATA and XCS or chip select which I know I can use a GPIO for.

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You sure this isn't an SPI interface? Or, something akin to I2C? What chip is it, or is it unmarked?

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That would be a three wire (probably half duplex) synchronous bus, similar to SPI, which is a four wire full duplex synchronous bus. Please post a link to the chip data sheet.

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Please post a link to the datasheet for the chip

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There is a protocol that is very robust called 1 wire CAN. This is a multi master bus that any node can send data. The Arduino uses a 16MHz clock but cannot communicate at 10MHz. The clock is normally divided down inside a chip as it may drive a state machine. Of course with all the great information given such as your magic chip we can only guess.

Hint: All signals need a reference, this is typically ground.

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MAS6116 – Stereo Digital Volume Control IC | Micro Analog Systems (mas-oy.com)

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Thanks. The MAS6116 data sheet describes the custom serial control protocol in detail.

This could easily be implemented with simple "bit-banged" I/O, and you can find examples for SSI interfaces, which are similar. Search phrase "arduino ssi interface".

1 Like
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I have yet to find an example for ard ... can you point to one? I am new to Ard - can it clock the serial bus?

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If you actually have an MAS6116 chip to test, properly mounted on a PCB with all the required decoupling capacitors and other components, please post the details (including a schematic circuit diagram).

I can take a closer look at the data sheet and post some code to try.

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image747×430 102 KB

Here is what I have for proof of concept

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There is no point in coding until you have something to test it with. Follow the manufacturer's recommendations in the data sheet for producing a properly designed test circuit and PCB, or buy the MAS6116 evaluation board.

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agree but do you know what pins to use on the ard?

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Any digital pins will work.

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