Re: LZ: Possibility of RAM Expansion
[Prev][Next][Index][Thread]
> I was quite intrigued by Ed Plese's and Per Finander's use of the I2C bus (
> A data bus format that can operate multiple IC's on a 2-wire bus ) to run
> the temperature sensor and other I2C-compatible circuits.
>
> While ordering the sample temperature chip from National Semiconductor (
> www.national.com ) to build Ed's temperature sensor, I also happened to find
> an available sample for a I2C-compatible EEPROM chip. I'm personally going
> to try creating a plug-in memory bank through the link port by using
> Finander's I2C routines.
>
> The chip, in specific, is a NM24C17L 16K-Bit Serial EEPROM with Write
> Protect and I2C Synchronous 2-Wire Bus support. However, each bus can only
> address a maximum of 16K bits, the size of one chip. If I could do multiple
> buses using digital or DC switches, that might work... but I'm not sure.
>
> If anyone with more experience in I2C ( Finander? ) could help me, this
> would be a great step in the right direction. I personally think that using
> either EEPROM bays with I2C or recording modulated audio is the way to go.
> The catch with audio, though, is both finding a way to record this without
> change from player to player, and the writing of such a program.
>
I'll help because I also ordered the EEPROM chip. But, I think that
up to 8 of these chips can be hooked up to one bus. Remember, each
chip is 16 Kbits (not Kbytes), so eight of these would make 16Kbytes.
My chip should come in a few days, so I'll let you know if I get it
working.
-Ed
References: