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Cheapest ARM controller for LED sign design

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Please suggest me Cheapest ARM controller for LED sign design


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if you asked about the price, i'm not sure. but i always found, professional led sign controller products from china always use STM32F103XXX, and it is only < US$ 20 with 4-16 MB memory on board, multi-layer PCB, can support single / dual color, excellent software, so i think the chip's price is very very cheap (i never found the chip in my country) :sad:
 

It depends on display parameters, mainly resolution and refresh rate. Lower resulotion displays can be controlled with 8051 or AVR. In large volume i would consider some FPGA based ASIC manufacturing (i.e Altera'a HardCopy service). Using fpga based asic enables you to use highly customizable cores (like MicroBlaze from Xilinx).
 

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