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Discussion Groups | LPC900 | LPC900 ISP or ICP features

Find help, specifications and source code for the LPC900. The LPC900 challenges Microchip and AVR based on the worlds most popular 8-bit architecture the 80C51. With a 2-clock core the LPC900 series is a high performance, very flexible and low cost 8-bit microcontroller family. Designers using or interested in these devices are encouraged to share their know-how and ask questions.

LPC900 ISP or ICP features - phlpcmicro - Feb 4 3:41:00 2006

Hi All,

Does ICP (Serially Clocked) have supperior features over ISP (UART)?

Obviously if you use ISP you need a stable clock source. If you
program the flash for external xtals or external clock source.... and
you forget  or don't have an external source then you can not program
the LPC900 in ISP mode... becuase internal RS Osc is not enabled.
(becuase you need the baud rate gen for the UART... which is dependant
on the osc source)
	Where as the ICP is self clocking (mode 0 of the UART Serially clocked)
	If you have LPC900 flash programmed for a external xtals or external
source....  but have not external xtal or source....  Can you still
program the LPC900 with ICP?

Does ICP switch back to internal RC OSC?
	I would be intertested to hear your thoughts

Thanks in advance

Joe G


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