[Arm-netbook] IC for analog and digital buttons (EOMA-68)

Simon Kenyon simon at koala.ie
Fri Aug 15 16:27:33 BST 2014

On 08/15/14 13:02, joem wrote:
> On Sun, 2014-07-27 at 20:30 +0100, Luke Kenneth Casson Leighton wrote:
>> On Sun, Jul 27, 2014 at 3:58 PM, peter green <plugwash at p10link.net> wrote:
>>> I count 6 ADCs channels required.
>>> I suspect the only single-chip soloution would be a microcontroller of some
>>> sort.
>>   yeahhh i have circuits already done for the ATSAM4SB which is a very
>> nice choice, and only around $2.50 or thereabouts in appx 10k volume.
> 2 Microcontroller SoM board in KiCAD GPL'd
> http://www.gplsquared.com/SoM1/SoM1.html
> Make the IO controller swappable.
> Board done up for LPC176x 100 pin chips, but easy enough to modify for
> any kind of similar chip and also go about standardising
> the connections.
> Another option is the ST chip
> http://www.aliexpress.com/item/STM32F103ZET6-STM32F103ZET-STM32F103ZE-STM32F103Z-STM32F103-ST-LQFP144-Import-original/1885087390.html
> (which is supported by the 'free' coocox compiler http://www.coocox.org)
> Has LCD controller. Requires RAM:
> http://www.aliexpress.com/item/10PCS-IS62WV51216BLL-55TLI-IS62WV51216BLL-55-IS62WV51216/1996481880.html
> And plenty of NAND to store graphics
> http://www.aliexpress.com/item/FLASH-WINBOND-W25Q64FVSSIG-W25Q64FVSIG-SOP-8-New-original/1616143156.html
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<bleat tone="plaintive">
     why do hardware designers think that all four edges of a PCB are 
fair game for off board connectors?
it makes mechanical design a lot more complicated than it should be.

he quickly steps off his soapbox.


Simon Kenyon
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