1-Wire Integration for Microcontroller with Microcontroller Acting as a 1- Wire Slave Device

[D2C2105]

Hi,

I am currently seeking an IC to integrate 1-Wire communication into my microcontroller project. I have a 1-Wire master device that needs to communicate with the microcontroller via 1-Wire communication. I have reviewed the DS2482 (I²C to 1-Wire) and DS2480B (UART to 1-Wire) ICs; however, both ICs convert the device into a 1-Wire master and not a 1-Wire slave. Could anyone suggest an IC that would allow the microcontroller to function as a 1-Wire slave device?

Thank you.

 

[FvM]

I'd suggest software emulation of 1-Wire function with a bidirectional I/O pin, preferably with interrupt function for fast response. Which processor?

--- Updated Jun 5, 2025 ---

Several 1-Wire software slave implementations, e.g. for Arduino can be found on the net. They should give you an idea how-to.

 

[D2C2105]

I'd suggest software emulation of 1-Wire function with a bidirectional I/O pin, preferably with interrupt function for fast response. Which processor?

--- Updated Jun 5, 2025 ---

Several 1-Wire software slave implementations, e.g. for Arduino can be found on the net. They should give you an idea how-to.

Thankyou for your suggestion, but i wanted IC based solution to simplify the process

 

[FvM]

Thankyou for your suggestion, but i wanted IC based solution to simplify the process

Guess there's none.

 

[danadakk]

You could always use an ATTINY or other low end micro and use it as a slave, although it intrinsically does
not have a HW only one wire solution. it would be bit banged with its own code.

https://arduino.stackexchange.com/questions/9238/emulating-1-wire-devices

Alternatively use a low end PSOC, use its user fabric, implement HW for clocks and incoming data using
schematic capture and/or Verilog. Or small CPLD.

fpga-hdl/hdl/onewire at master · jeras/fpga-hdl

A set of small Verilog projects, to simulate and implement on FPGA development boards - jeras/fpga-hdl

github.com

 

[KlausST]

Thankyou for your suggestion, but i wanted IC based solution to simplify the process

I´d say a microcontroller is an IC.

But I guess you are looking for a "single wire interface IC". What benefit do you see?
* It takes more microcontroller port pins, and
* it needs microcontroller software to communicate, and
* it needs microcontroller processing power and memory ressources

Klaus

 

[danadakk]

@OP, are you constrained where you cant use the existing uC for the slave function ?
Or need to add additional slaves to an existing design ? Let us know the background
for the decision to seek stand alone Onewire slave node(s).