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Messages - Bauke Siderius

#1
Old Topics / Re: p*(LPC932 current draw
May 13, 2004, 02:27:40 PM
Hi,

Roughly 1mA per MHz typical while running, you can divide this down with DIVM where you application code does not need the horsepower.
With a DIVM of 0xFF the part draws about the base current for the crystal oscillator drive circuit, medium crystal selection is about 500 uA.

Total power down is typically 0.1 uA.
To get the low power in total power down mode, turn off the WD run bit, and turn off the CLKLP in the AUXR register. And make sure no current is sourced through the pins of the part.

Regards,

Bauke
#2
Old Topics / Re: ISP probl
May 13, 2004, 02:18:53 PM
Hi,

The first thing I would do is check with a scope that you acctually have a clock signal with an external crystal.

Erik, I'm not aware of any problems using a higher clock signal, this should work the same as with the internal RC oscillator.
A slower clock rate than the internal RC oscillator's 7.37MHz would make the autobauding slower.

Regards,

Bauke
#3
LPC9xx/LPC9xxx / Re: ISP or ICP
April 20, 2004, 10:15:30 AM
Hi,

More details on ICP programming are in the appnote on how to use ICP. http://www.semiconductors.philips.com/acrobat/applicationnotes/AN10258_1.pdf
ICP was developed for the small 8pin devices with 1K of memory that does not have the memory available for 512 bytes of ISP and additional memory for the IAP commands.
It is available on all parts except the LPC932, a new LPC932A1 will come out that does support ICP. This will also allow you to use the full 8K of the device.

Regards,

Bauke