[E3-hacking] Cheap PL2303 cable @ Ebuyer
matt at axio.ms
Wed Jul 13 14:07:50 BST 2005
On 13 Jul 2005, at 12:56, David Given wrote:
> The plastic box the PCB is inside has a space for a switch, marked L
> and R,
> but there is no switch there and there are no pads on the PCB for
> installation of one. I suspect someone's been saving money.
Sounds like mine - box-wise - though the PCB is different.
> I can't tell whether my device is set up for 5V or 3.3V; I'll just
> have to
> plug it in and measure it. Is it known that the E2 *doesn't* work with
> And what's the modification I need to do?
Yeah that's probably the best way - see if TxD is 5V or 3.3V. The real
issue isn't whether the E2 will talk at 3.3V (IIRC it /does/ work at
this voltage) but whether you'll zap the input on the PL2303 by driving
5V into a 3.3V input.
*reads datasheet, which always helps* OK, no, you should be alright
:-) It says the inputs are always 5V-tolerant. So, it will probably
Just Work - cross the voltage-too-low bridge if you come to it.
(Modify the cable to run I/O at 5V rather than 3.3V if necessary.)
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