Jeethu Rao wrote:
>
> Here is the EEPROM Read code found on
> Page 93 of the 16f628 data sheet.
>
> BCF STATUS, RP0 ; Bank 0
> MOVLW CONFIG_ADDR ;
> MOVWF EEADR ; Address to read
> BSF STATUS, RP0 ; Bank 1
> BSF EECON1, RD ; EE Read
> BCF STATUS, RP0 ; Bank 0
> MOVF EEDATA, W ; W = EEDATA
>
> Everything seems fine except for the last line.
> The register map shows that EEDATA is in Bank1.
> So reading EEDATA would actually read RCREG!
>
> Is this an error in the data sheet ?

Yes, this is what I use, assuming EEADR is set already...

RdEep   bsf STATUS,RP0          ; RAM Page 1
        bsf EECON1,RD           ; read EEPROM
        movf EEDATA,W
        incf EEADR              ; set for next sequential read
        bcf STATUS,RP0          ; RAM Page 0
        return

> I guess they merely copied the routine from
> The 16f84 data sheet. How misguiding this could
> be to newbies!

A big headache no doubt.

Report it to Microchip. I have done so in the past for this data sheet
and got an immediate fix.

--
Best regards

Tony

mICros
http://www.bubblesoftonline.com
mailto:sales@bubblesoftonline.com

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