Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
Oleg Sergeev
04/11/06 23:58
Read: 718 times
St. Petersburg
Russia


 
#114133 - AT89S8252
Responding to: Jan Waclawek's previous message
hi,

Oleg Sergeev said:
- some derivatives do not allow to use MOVX with @Ri;

Jan Waclawek said:
Wow, which one dares?


AT89S8252 Primer says at page 2:

EEPROM
EEPROM and external data memory are accessible by indirect addressing only, utilizing the MOVX instructions, which come in two flavors: 8-bit and 16-bit. Only the 16-bit MOVX instructions (those utilizing DPTR) may be used to access internal EEPROM. The 2K bytes of EEPROM are accessed at addresses 000H-7FFH.

Probably AT89S8253 does the same way.

Regards,
Oleg

List of 28 messages in thread
TopicAuthorDate
unclarity with movx instruction      Markus Kammersberger      04/10/06 09:32      
   Speed up      Kai Klaas      04/10/06 09:39      
      Mistake      Kai Klaas      04/10/06 09:48      
   Clarity prevails!      Andy Neil      04/10/06 09:48      
      Quicker?      Kai Klaas      04/10/06 09:54      
         Quicker!      Andy Neil      04/10/06 10:11      
            assumption...      Andy Neil      04/10/06 10:19      
            Finally, you are right!      Kai Klaas      04/10/06 10:21      
   MOVX @Ri      Jan Waclawek      04/10/06 09:52      
      since you did not have the time to find      Erik Malund      04/10/06 10:01      
      wrong answer      Erik Malund      04/10/06 10:03      
         Typo      Abhishek Singh      04/10/06 11:03      
         thanks Erik for the correction      Jan Waclawek      04/10/06 14:14      
   It is set to P0      Neil Kurzman      04/10/06 10:01      
      wrong again      Erik Malund      04/10/06 10:04      
         Yes I am      Neil Kurzman      04/10/06 11:55      
   an example      Jan Waclawek      04/10/06 14:21      
      Internal XRAM      David Smith      04/11/06 14:29      
         not really      Erik Malund      04/11/06 14:38      
            Ports' SFR are set to 1      Kai Klaas      04/11/06 19:54      
               not a port, a "page SFR"      Erik Malund      04/12/06 05:59      
         P2?      Kai Klaas      04/11/06 19:49      
            Doh!      David Smith      04/12/06 03:06      
   which derivative      Oleg Sergeev      04/11/06 00:06      
      do not allow?      Jan Waclawek      04/11/06 01:30      
         AT89S8252      Oleg Sergeev      04/11/06 23:58      
            Aaaaah, so. Thanks.      Jan Waclawek      04/12/06 00:49      
   Tanks      Markus Kammersberger      04/11/06 01:43      

Back to Subject List