working with external memory

[malc-c]

One alternative (assuming I can find it in the UK) is this

http://www.jianpingusa.com/datasheet...nstruction.pdf

Basically an SD/MMC card reader that communicates via serial


Ouch - $50

[mackrackit]

Have you seen this?
Need an 18F with a fair amount of memory. 18F2550 works great with it.

[malc-c]

Have you seen this?
Need an 18F with a fair amount of memory. 18F2550 works great with it.

Seen what Dave ....

Currently using an 18F4580 - The current version of my code compiles to around 24K

[mackrackit]

http://melabs.com/resources/samples/pbp/sdfs3.htm
It was a hidden link

[malc-c]

http://melabs.com/resources/samples/pbp/sdfs3.htm
It was a hidden link

LOL - yeah right !!

Interesting and seems a simple project... the only thing is that I don't have 6 pins available, at least not without changing the package to a 44 pin package and even then I still think it would be tight or short of a pin.... not to mention the re-design of the PCB

Thanks for the link though...

I've opted to do the logging in the PC application, for now

[Dave]

malc-c , Why on earth would you need 6 pins for external eeprom storage? I currently use 4, 24LC1025's to store data for a little over a month @ 1 minute intervals. The data is stored for approx. 750 minutes a day during daylight. The data stored is 16 bits per variable of: pointer,azminuth,elevation,up,down,east west and status words. The amount of data you are trying to store isn't much. besides, I only use 2 pins for the 4, 24lc1025's giving me a little over 4 Migabits...

Dave Purola,
N8NTA

[mackrackit]

Six pins for an SD card.