Rei Vilo 695 Posted July 24, 2013 Share Posted July 24, 2013 This call for design is superseded by the Call for Design - SD-Card + EEPROM + SRAM + 40-pin connector TFT BoosterPack for LaunchPad. Hi! I'm looking for a combined BoosterPack for the Stellaris LaunchPad. Ideally a in-between BoosterPack with room for 2x 1Mb fast SRAM for caching enough EEPROM for fonts SD-card or uSD-card slot All this on one single hardware SPI bus with 4 CS, and ideally with jumpers to select the SPI bus among the 4 of the Launchpad Stellaris... This demand is originated by the nice screens I'm playing with at [Energia Library] LCD_screen Library Suite. I want to get rid of this awful circuit: I know there are already 2 SD-card BoosterPacks, The CardReader- SDCard Booster Pack Breakout PCB The CardReader- SDCard BoosterPack but both are designed solely for the MSP430 with 20 pins, when the Stellaris features 40 pins. Thank you! Quote Link to post Share on other sites
Rei Vilo 695 Posted July 24, 2013 Author Share Posted July 24, 2013 This is a cross post with Call for Design - SD-Card + EEPROM + SRAM BoosterPack for Stellaris LaunchPad on Stellarisiti as the BoosterPack is intended at the Stellaris LaunchPad but only 43oh has a store. Quote Link to post Share on other sites
cubeberg 540 Posted July 24, 2013 Share Posted July 24, 2013 Any preference on the chips? I'd be happy to tackle this one. Quote Link to post Share on other sites
reaper7 67 Posted July 24, 2013 Share Posted July 24, 2013 @@cubeberg - preference? yes SRAM -> 2 x 23LC1024 EEPROM -> 1 x 25LC1024 Rei Vilo 1 Quote Link to post Share on other sites
cubeberg 540 Posted July 24, 2013 Share Posted July 24, 2013 Preference on SMD or DIP? Both are available in SOIC - smd will make the jumpers easier. Quote Link to post Share on other sites
reaper7 67 Posted July 24, 2013 Share Posted July 24, 2013 there is a lot of space for dip but smd looks better smd can be mounted under(bottom side) of sdcard slot and rest area can be designated for jumpers/pads (select spi bus, cs lines etc) Quote Link to post Share on other sites
cubeberg 540 Posted July 24, 2013 Share Posted July 24, 2013 Sounds good - I'll take a run at it - should have something to review in a couple of days! Quote Link to post Share on other sites
reaper7 67 Posted July 24, 2013 Share Posted July 24, 2013 GREAT!!! but one notice - I think about (sex with my wife - too ;-) ) max flexibility with spi bus and cs selections I don't know how realize it on pcb project, but for me must be selection between spi0/spi1/spi2/spi3 (for LM4F) and of course CS pins for all devices SRAM + EEPROM maybe connected together to the same spi bus on "ALLMEMORY BOOSTERPACK" (maybe SD card too - Rei must give their five cents). Rei Vilo 1 Quote Link to post Share on other sites
cubeberg 540 Posted July 24, 2013 Share Posted July 24, 2013 I'm going to try to make it configurable on any one of the 4 buses - we'll see how things go with layout. If you're accessing one more frequently (e.g. SRAM) - it's probably better for it to be on its own. Quote Link to post Share on other sites
igor 163 Posted July 24, 2013 Share Posted July 24, 2013 Edit - Misread specs, never mind. Quote Link to post Share on other sites
reaper7 67 Posted July 24, 2013 Share Posted July 24, 2013 @@cubeberg - as Rei wrote SRAM devices are connected to one spi bus but if it possible on pcb - leave a choice for the user Quote Link to post Share on other sites
RobG 1,892 Posted July 24, 2013 Share Posted July 24, 2013 In the mean time, you can use this one Quote Link to post Share on other sites
reaper7 67 Posted July 24, 2013 Share Posted July 24, 2013 @@RobG - I'm currently using these two: and my new strange BP :grin: Quote Link to post Share on other sites
Rei Vilo 695 Posted July 25, 2013 Author Share Posted July 25, 2013 Thank you for all the interesting comments. Here are my five Quote Link to post Share on other sites
reaper7 67 Posted July 25, 2013 Share Posted July 25, 2013 ...So preferred SPI port 1. Having configurable with any one of the 4 buses is perfect! ... that's right! if it's possible Quote Link to post Share on other sites
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