1-wire DS2480B microcontroller-RS232 help!

Ashu

New Member
Hey guys, I am really new to all 1-wire technology and I really need some help here. Basically my problem is this: I am sending data via RS232 from a computer to a microcontroller using a MAX232 chip. The problem now is that I wish to be able to send data AND power the microcontroller at the same time, and that's how I found the 1-wire technology. I ordered some samples of the DS2480B.

Now, this may seem stupid, but is this possible?: I set the VDD, VPP, and POL all to 5V, then I hook up the data from the MAX232 to the RECEIVE pin, and finally the 1-wire goes to both the Receive UART pin, as well as the Vdd of the microcontroller?

Or am I wasting time and require a 1-wire product to use this chip with?

Thanks a lot guys.
 
Hey guys, I am really new to all 1-wire technology and I really need some help here. Basically my problem is this: I am sending data via RS232 from a computer to a microcontroller using a MAX232 chip. The problem now is that I wish to be able to send data AND power the microcontroller at the same time, and that's how I found the 1-wire technology. I ordered some samples of the DS2480B.

Now, this may seem stupid, but is this possible?: I set the VDD, VPP, and POL all to 5V, then I hook up the data from the MAX232 to the RECEIVE pin, and finally the 1-wire goes to both the Receive UART pin, as well as the Vdd of the microcontroller?

Or am I wasting time and require a 1-wire product to use this chip with?

Thanks a lot guys.

If I am understanding what you are trying to do correctly then it probably won't work. 1-Wire chip can "steal" power from the 1-Wire buss but your microcontroller probably draws more power than 1-Wire can provide.

Eric
 
Hey guys, I am really new to all 1-wire technology and I really need some help here. Basically my problem is this: I am sending data via RS232 from a computer to a microcontroller using a MAX232 chip. The problem now is that I wish to be able to send data AND power the microcontroller at the same time, and that's how I found the 1-wire technology. I ordered some samples of the DS2480B.

Now, this may seem stupid, but is this possible?: I set the VDD, VPP, and POL all to 5V, then I hook up the data from the MAX232 to the RECEIVE pin, and finally the 1-wire goes to both the Receive UART pin, as well as the Vdd of the microcontroller?

Or am I wasting time and require a 1-wire product to use this chip with?

Thanks a lot guys.

Ashu,

It sounds like you saw figure 11E in the spec sheet and the "power-stealing" capabilities. IF you go this route, then you COULD interface the RS232 port on your PC and power your microcontroller, BUT, the microcontroller would have to be able to act as a 1-Wire slave AND the power consumption of that circuit would have to be within the limits of the PC serial port's output on DTR/RTS, which won't be much.

Perhaps you could explain what you are trying to do a bit more?

Mitch
 
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