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jzef
Joined: 14 Sep 2021 Posts: 20
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The Robman Site Owner
Joined: 01 Aug 2003 Posts: 21271 Location: Chicago, IL |
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jzef
Joined: 14 Sep 2021 Posts: 20
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Posted: Thu Sep 30, 2021 7:33 am Post subject: RTS line in JP1 remote |
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What is the RTS line voltage? I have a universal remote control, but without user manual and without pin markings on the PCB. I want to check with the DT830 multi-meter. |
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jzef
Joined: 14 Sep 2021 Posts: 20
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Posted: Thu Sep 30, 2021 8:21 am Post subject: |
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I have such voltage on the pins in my remote control:
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jzef
Joined: 14 Sep 2021 Posts: 20
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Posted: Thu Sep 30, 2021 12:27 pm Post subject: |
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Remote have 28-pin chip EL-2000. With such a connection of the remote control to the USB-TTL converter, after clicking the Download button in the RMIR program, the diode on the remote is blinking:
RTS - 1
TXD - 3
RXD - 4
GND - 7
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mathdon Expert
Joined: 22 Jul 2008 Posts: 4530 Location: Cambridge, UK |
Posted: Fri Oct 01, 2021 4:06 am Post subject: |
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jzef wrote: | What is the RTS line voltage? I have a universal remote control, but without user manual and without pin markings on the PCB. I want to check with the DT830 multi-meter. |
I'm not sure what you are trying to achieve with your multimeter, but the nominal voltage of all output pins is 3.0v and input pins normally have a pull-up resistor that will make them also read as 3.0v, so you cannot distinguish between pins by their voltage. _________________ Graham |
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jzef
Joined: 14 Sep 2021 Posts: 20
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Posted: Fri Oct 01, 2021 12:48 pm Post subject: |
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mathdon wrote: | nominal voltage of all output pins is 3.0v |
OK, Thx. |
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