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Author Topic: USB TLL adapter  (Read 22 times)

ecc2000

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USB TLL adapter
« on: February 12, 2020, 16:48:13 »

Hello,

If I want to mount a USB TLL adapter on the Atmega162 should I keep the resistors R15 and R16 in series in RX TX ??

How to connect the reset on pin 6, should you keep R1 and C9 and put a push button?

The reset goes to Pic 18F14K50, how to have this reset connection with a USB TLL adapter, or is it not important?

thank you so much

Pierre
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TCWORLD

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Re: USB TLL adapter
« Reply #1 on: February 13, 2020, 09:18:44 »

Hi Pierre,

The resistors aren't requires on the TX/RX lines.

The pin on the PIC that controls the reset line is the RTS or DTR signal on the USB adapter.
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Tom Carpenter (AstroEQ)

ecc2000

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Re: USB TLL adapter
« Reply #2 on: February 13, 2020, 16:16:53 »

On my adapters I don't have the DTR pin, is this mandatory?

Thank you

Pierre
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TCWORLD

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Re: USB TLL adapter
« Reply #3 on: February 15, 2020, 00:21:54 »

Do they have an RTS pin?
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Tom Carpenter (AstroEQ)

ecc2000

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Re: USB TLL adapter
« Reply #4 on: February 15, 2020, 10:45:45 »

Hello,

No Tom they are simple and I did not pay attention, I will order another with the DTR pin!

https://www.ebay.fr/itm/Convertisseur-UART-USB-CP2102/153797368692

Thank you

Pierre
« Last Edit: February 15, 2020, 11:00:23 by ecc2000 »
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