LPCXpresso IDE中的主题 Re: BitBanding GPIO Voltage

BitBanding GPIO Voltage

lpcware — Thu, 16 Jun 2016 01:44:07 GMT

Content originally posted in LPCWare by nkarakotas on Tue Jul 24 01:02:28 MST 2012
Hello,

I noticed when using bitbanding on a GPIO the voltage rises up to 2.3V
BITBAND_SRAM_SetBit(LPC_GPIO2_BASE,3);

Why is that?

Re: BitBanding GPIO Voltage

lpcware — Thu, 16 Jun 2016 01:44:08 GMT

Content originally posted in LPCWare by NXP_Europe on Tue Jul 24 03:16:43 MST 2012
Hello nkarakotas,

Can you be a bit more specific?

Where did you measure the voltage?

Re: BitBanding GPIO Voltage

lpcware — Thu, 16 Jun 2016 01:44:09 GMT

Content originally posted in LPCWare by nkarakotas on Tue Jul 24 03:23:27 MST 2012
Hi,

I measured it on an line I have connecting to a LCD, I then removed the lcd and measured the voltage directly. Firstly I didnt use bitbanding and got 3V3. I then used bit banding and toggled the pin and so it rise up to 2.3V.

Regards,
Nick