Hi,
What's the maximum input voltage level on an un-powered device?
What's the maximum input clamp current of an IO?
I personally find the documentation on the input structure of LPC GPIO pins quite unclear.
Most pins are 5V tolerant, but only with Vdd present. But I can't seem to find the voltage levels when vdd is not present (LPC1317), see snapshot from the datasheet below:
In another thread it is mentioned that the input structure is a normal input clamp but that can't be the case due to the 5V tolerant pins.
Also, the input clamp current is not specified both for analog and digital pins.
If I follow the datasheet strictly this means that no signal can be connected to the micro-controller that isn't preceded by something that's on the same supply as the controller.
For example, the 3V3 rail of the controller could be short circuited or starting up while a 5V rail remains 5V.
Thanks in advance.
Hi again,
Also, what are the specs for the open drain pins, PIO0_4 & PIO0_5 for the LPC1317?
Are these 5V tolerant and I2C compliant? With or without supply?
Could it be that the datasheet needs updating?
When I look in the datasheet of the LPC111x the open drain pins are mentioned but not for the LPC13xx:
Hopefully someone can help.
Some similar questions:
https://community.nxp.com/message/765563?commentID=765563#comment-765563
I2C 5V Toterant (with and without supply?)
https://community.nxp.com/message/750299?commentID=750299#comment-750299
Thanks
Hi,
TIC
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Hi Jeremy,
Thanks for your response. Could you give an indication when to expect the data?
I'm currently designing a product with the LPC1317.
Thanks.
Hi,
Thanks for your reply.
Sorry, I'm not clear with the exactly schedule of releasing the updated datasheet.
And I will inform if I get it.
TIC
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