lpcware

LPC1111/201 PIO 3.4 3.5 output issue

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by iancaddy on Tue Jul 26 23:57:42 MST 2011
I am using a LPC1111F/201 processor in a design, and I am trying to setup PIO3_5 as outputs and drive it low.

(Edited as was 3.4 and 3.5, but turns out 3.4 was user error, only still having problems with 3.5)

AHBCLKCTRL (0x40048080) = 0x00011a5f

IOCON_PIO3_5 (0x40044048) = 0x00D0 (default, but have also tried 0x00C8 and 0xC0)
GPIO3DIR (0x50038000) = 0x0034 (outputs, 3_2, 3_4, 3_5)
GPIO3DATA (0x50030000) = 0x0000 (all outputs OFF/0)

The problem is the output 3_5 is sitting at about 3.2V respectively with nothing connected to it.

Has anyone a solution or a similar issue?

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