Seems like MICROCHIP can't make up their mind on whether the PIC18 TBLPTR
is 21 or 22 bits wide...
some places in the datasheet it says it is 21bits, other places it
says 22bits.
I'm having trouble simulating this stuff.
The datasheet states that bit21 is used to access the config and id
locations (bit22 and bit23 are not implemented).
However when I load FFh into TBLPTRU and put a watch on it it comes
out with 1Fh....
The way I see this it should be 3Fh....otherwise one can't access the
config bits.
Looks to me that this is a bug in MPLAB, and that they've truncated
one bit too much (bit21)...
anyone have any experience with this
oddity?
--
*******************************************
VISIT MY HOME PAGE:
<http://home.online.no/~eikarlse/index.htm> LAST UPDATED: 23/08/2003
*******************************************
Best Regards
Eirik Karlsen
Reply by Eirik Karlsen●March 27, 20042004-03-27
Can someone of you try this code snippet, place a watch on the TBLPTR and
see if the TBLPTR
gets 3F FF FF or 1F FF FF ????
Seems like MICROCHIP can't make up their mind on
whether the PIC18 TBLPTR is 21 or 22 bits wide...
some places in the datasheet it says it is 21bits, other places it
says 22bits.
I'm having trouble simulating this stuff.
The datasheet states that bit21 is used to access the config and id
locations (bit22 and bit23 are not implemented).
However when I load FFh into TBLPTRU and put a watch on it it comes
out with 1Fh....
The way I see this it should be 3Fh....otherwise one can't access the
config bits.
Looks to me that this is a bug in MPLAB, and that they've truncated
one bit too much (bit21)...
anyone have any experience with this
oddity?
--
*******************************************
VISIT MY HOME PAGE:
<http://home.online.no/~eikarlse/index.htm> LAST UPDATED: 23/08/2003
*******************************************
Best Regards
Eirik Karlsen
