LPC812 I2C pins swapped on LPCXpresso LPC800 REV B board

[lpcware]

Content originally posted in LPCWare by Pat on Thu Nov 19 03:42:46 MST 2015
Hi,

Just to note:
LPCXpresso LPC800 rev B board schematic shows PIO0_10-SDA and PIO0_11-SCL on page 5 on the LPC expansion connector J6

The pins P0_10 and P0_11 are indeed routed from the LPC812 microcontroller to these pins on J6. But the function on the LPC812 for pin P0_10 is SCL and P0_11 is SDA.

So CLK and SDA are swapped.

[lpcware]

Content originally posted in LPCWare by Pat on Mon Nov 23 04:07:48 MST 2015
Hi A,

Indeed nothing wrong here, the remark is only made to make people aware that in default pin configuration the silk screen print can cause confusion: The LPC pin routing to J6 pin 40 and 41 ( PIO0_10 and PIO0_11) is correct, but the silk screen label gives the impression that PIO_010 is SDA and PIO0_11 is SCL. But that is the other way around in default configuration for an LPC81x !

Thanks for pointing out the possibilities to use the switch matrix to swap to pin function for these two open-drain pins.

[lpcware]

Content originally posted in LPCWare by lpcmunich on Fri Nov 20 07:16:08 MST 2015
Hi Pat,
Nothing wrong here.
You can assign any of them (PIO0_10/PIO0_11) as SCL and SDA through Switch Matrix.
Refer the User Manual for more details.