Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 252)

Maxim Integrated A1-7

MAXQ612/MAXQ622 User’s Guide

; pointer as the active source.

move ACC, @DP[1] ; *WRONG* DP[1] is *NOT* properly configured properly

move ACC, @DP[0] ; DP[0] is now properly configured properly to read

END

All of the single pointer examples can be extended to multiple pointer

versions. It is assumed that those operations can be extrapolated from

the given examples.

Conclusions:

- pointer mode and pointer selection/activation need to be preformed in

separate instructions.

- pointer mode has to be set before writing an address to a pointer

- pointer activation can be performed by direct writes to the DPC.SDPS

bits, by writing an address to a pointer register, by recirculating the

contents of a pointer register or by using auto-inc (++) or auto-dec

(--) pointer operations.

- If a pointer is used (in the context of the global application, not

the local assembler module) in both byte and word modes, then all 17-bits

of a pointer should be saved and restored.

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Maxim-integrated MAXQ622 Manual do Utilizador Página 252