Very good Seb, just remember not to allow SD chip select to go inactive in the middle of a sector.
Matt. On May 3, 4:58 am, Sebastien Lelong <[email protected]> wrote: > Hi guys, > > I added an optional SPI EEPROM (SOIC package) to Jaluino Bee. It's also pin > compatible with 23K256 SRAM, and also with a SST serial flash. So PCB would > work with an extra EEPROM, SRAM and Flash. > > I added a 100nF decoupling cap. /WP (Write Protect) and /HOLD (pause) are > tied to 3V3, so always enabled (so no write protect, and no hold/pause) in > order to save few pins. Solder jumper is here to choose the Chip-Select pin > depending on the PIC being used (25K22 or 27J53) > > [image: spi_eeprom_sram.png] > > Cheers, > Seb > > 2011/4/21 Oliver Seitz <[email protected]> > > > > > > I perfer the RAM due to fast > > > read/write speeds, high endurance. Does > > > SST have any serial ram? What is the write speed of SST > > > flash? > > > I was about to write that... But then I realized that both chips were pin > > compatible, so the PCB would work with ram or flash ;-) > > > Greets, > > Kiste > > > > spi_eeprom_sram.png > 13KViewDownload -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
