CLOSED - Call for Design - SD-Card + EEPROM +SRAM BoosterPack for Stellaris LaunchPad

[Rei Vilo 695]

This call for design is superseded by the Call for Design - SD-Card + EEPROM + SRAM + 40-pin connector TFT BoosterPack for LaunchPad.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!

[Rei Vilo 695]

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.

[cubeberg 540]

Any preference on the chips?  I'd be happy to tackle this one.

[reaper7 67]

@@cubeberg - preference? yes

SRAM -> 2 x 23LC1024

EEPROM -> 1 x 25LC1024

[cubeberg 540]

Preference on SMD or DIP?  Both are available in SOIC - smd will make the jumpers easier.

[reaper7 67]

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)

[cubeberg 540]

Sounds good - I'll take a run at it - should have something to review in a couple of days!

[reaper7 67]

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).

[cubeberg 540]

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.  

[igor 163]

Edit - Misread specs, never mind.

[reaper7 67]

@@cubeberg - as Rei wrote SRAM devices are connected to one spi bus

but if it possible on pcb - leave a choice for the user

[RobG 1,892]

In the mean time, you can use this one

[reaper7 67]

@@RobG - I'm currently using these two:

 

and my new strange BP :grin:

[Rei Vilo 695]

Thank you for all the interesting comments. Here are my five

[reaper7 67]

...

• So preferred SPI port 1. Having configurable with any one of the 4 buses is perfect!

...

 

that's right! if it's possible