wait a sec, the resistor will fix the the 5v to 3.3 volt issue by limiting the
current? I don't understand.
>________________________________
> From: Didier Juges <>
>To:
>Sent: Friday, February 28, 2014 3:08 PM
>Subject: Re: [ts-7000] TTL serial on a TS7200
>
>
>
>
>Be careful that some GPS modules output 5V TTL. That will fry rour TS-xxxx in
>a hurry. I know that for a fact.
>
>
>You do not need RS-232 level shifters, but you may need one to go from 5V to
>3.3V. Usually, a 4.7k resistor in series with the Tx output of the GPS is all
>you need. The input of the TS-xxxx will clamp at 3.3V and the resistor will
>limit the current to a safe value. No need to do anything with the Tx output
>of the TS-xxxx. The 5V device will accept 3.3V inputs just fine.
>
>
>Didier
>
>
>
>
>On Fri, Feb 28, 2014 at 9:46 AM, Jonathan Leslie <> wrote:
>
>
>>
>>I dont' know the ts7200 specifically, but the ts7500 you just solder onto the
>>RX and GND pins to the gps modules TX and GND pins and you are hardware ready
>>to go. The GPS module broadcasts 1 a second a dump at 4800 BPS.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>>________________________________
>>> From: Yan Seiner <>
>>>To:
>>>Sent: Friday, February 28, 2014 10:40 AM
>>>Subject: [ts-7000] TTL serial on a TS7200
>>>
>>>
>>>
>>>
>>>I have a TS7200 that I'd like to interface with a GPS module. Most of
>>>the bare modules are TTL - 3.3 to 5V. Is there a way to set up a serial
>>>port on the 7200 with ttl levels?
>>>
>>>I need RX, TX, and DCD pins active on the serial port for the GPS.
>>>
>>>
>>>
>
>
>
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