Power-down mode currents pour lpc1776

[lpcware]

Content originally posted in LPCWare by Greg on Thu May 03 09:25:27 MST 2012
Hi,
I have a problem for the currents in power-down mode for a LPC1776, the data-sheet write 56uA, and I measure 2.7mA.
For go in power-down mode, I use:

LPC_SC->PCONP=0;           /*stop all peripherical*/
SCB->SCR = 0x4;            /*set SLEEPDEEP bit */
LPC_SC->PCON = 0x09;      /* Power Down Mode*/
__WFI();

If I disconnect VCCIO (VCC is connected) the currents rise (add 2mA ).

Only the deep-power-down mode have a good currents (2.4uA measured), but it not acceptable for me because I want the internal RAM powered.

Do you used the power-down mode and what is your measured currents?

Thanks in advance for any help.
Greg

[lpcware]

Content originally posted in LPCWare by Greg on Fri May 11 03:08:37 MST 2012
Hi,
I've test in my hardware the new "LPC178x Low Power Modes" software in NXP website http://www.nxp.com/documents/software/AN11096.zip ,
but in power-down mode I measure 8.14mA and in PDF file(AN11096), NXP said: 52uA (NXP have test in IAR LPC1788-SK board).
but where is my the problem?
Who can test it?

Thanks