Are the ADRESH and the ADRESL registers writable in the PIC16F87x series? The documentation doesn't appear to say. Thomas
Quick PIC question
Started by ●June 28, 2005
Reply by ●June 28, 20052005-06-28
Thomas Magma wrote:> Are the ADRESH and the ADRESL registers writable in the PIC16F87x series? > The documentation doesn't appear to say. > > Thomas > >Hmm, DS30292B(the version of the spec I have) page 118 last sentence of section 11.4.1 "...(A/D disable) these registers can be used as two general purpose 8-bit registers." So it would appear you could if they are not being used for A/D conversion.
Reply by ●June 28, 20052005-06-28
"Thomas Magma" <somewhere@overtherainbow.com> wrote in message news:zBlwe.114112$El.11070@pd7tw1no...> Are the ADRESH and the ADRESL registers writable in the PIC16F87x series? > The documentation doesn't appear to say. > > Thomas >see page 118 in the 16f877 datasheet When an A/D result will not overwrite these locations (A/D disable), these registers may be used as two general purpose 8-bit registers. Using a 16f877 or 16f877a ? Alex
Reply by ●June 29, 20052005-06-29
PIC16F874A (44-TQFP) "general purpose 8-bit registers" this is great!! This makes it a really easy engineering change order then. 2 lines of code to fix this one! Thanks Thomas "Alex Gibson" <news@alxx.net> wrote in message news:3ieegpFl6804U1@individual.net...> > "Thomas Magma" <somewhere@overtherainbow.com> wrote in message > news:zBlwe.114112$El.11070@pd7tw1no... >> Are the ADRESH and the ADRESL registers writable in the PIC16F87x series? >> The documentation doesn't appear to say. >> >> Thomas >> > > see page 118 in the 16f877 datasheet > > When an A/D result will not overwrite these locations (A/D disable), > these registers may be used as two general purpose 8-bit registers. > > > Using a 16f877 or 16f877a ? > > Alex >
