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Discussion Groups | Piclist | Expanding EEPROM
A discussion group for the PICMicro microcontroller. Also called the Microchip PIC, this list is dedicated to the use and abuse of this fine, simple, microcontroller. Close to topic posts are welcome, ie. general electronics.
Expanding EEPROM - Paul_Lav - Jul 30 3:18:00 2003
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Just wondering, is it possible to buy a IC to
expand EEPROM memory to the pic? And what sort of I/O do they take to run?
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RE: Expanding EEPROM - Wouter van Ooijen - Jul 30 3:36:00 2003
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> ust wondering, is it possible to buy
a IC to expand EEPROM memory to the pic? And what sort of I/O do they take to
run?
It will not expand the on-board EEPROM in a seamless way, but there
are numerous external 8-pin EEPROMs available, for instance from Microchip or Atmel.
Protocol is SPI or I2C (although they often don't use that name). IIRC
Dallas makes EEPROMs with their 1-wire protocol.
Wouter van Ooijen |
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Re: Expanding EEPROM - Paul_Lav - Aug 1 2:39:00 2003
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I have found some EEPROM's. Microchip are the cheapest,
anyone ever used one of them? 24LC08BP or 24LC16BP? They are I2C and easily
understandable!
Thanks,
Paul
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Re: Expanding EEPROM - rtstofer - Aug 1 9:13:00 2003
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Microchip has some application notes about I2C. If the PIC you are using has the MSSP port then I2C hardware is built in. If not, you can use the 'bit-bang' approach where you wiggle the clock and data lines with code. If you are only using an EEPROM the bit-bang approach might be the easiest to implement at least for a start. --- In , "Paul_Lav" <paul_lav@y...> wrote: > MessageI have found some EEPROM's. Microchip are the cheapest, anyone ever used one of them? 24LC08BP or 24LC16BP? They are I2C and easily understandable! > > Thanks, > Paul > ----- Original Message ----- > From: Wouter van Ooijen > To: > Sent: Wednesday, July 30, 2003 9:36 AM > Subject: RE: [piclist] Expanding EEPROM > > ust wondering, is it possible to buy a IC to expand EEPROM memory to the pic? And what sort of I/O do they take to run? > > It will not expand the on-board EEPROM in a seamless way, but there are numerous external 8-pin EEPROMs available, for instance from Microchip or Atmel. Protocol is SPI or I2C (although they often don't use that name). IIRC Dallas makes EEPROMs with their 1-wire protocol. > > Wouter van Ooijen > > -- ------------------------------------------- > Van Ooijen Technische Informatica: www.voti.nl > consultancy, development, PICmicro products > > > Yahoo! Groups Sponsor > ADVERTISEMENT > > > to unsubscribe, go to http://www.yahoogroups.com and follow the instructions > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: Re: Expanding EEPROM - Paul_Lav - Aug 2 3:01:00 2003
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Hi, the pic is a 16F877. I have found the chapter on the
datasheet an am downloading AN578. Would it be easier to do it manually or is this
function usefull when going?
Thanks,
Paul
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