
1.OVERVIEW OF PMC B-63983EN/02
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1.4.4.3 Notes on using subroutines
(1) DISPB
(2) EXIN
(3) WINDR (low-speed type only)
(4) WINDW (low-speed type only)
(5) AXCTL
For the above functional instructions, ACT = 1 must be held until
transfer completion information (coil) is set to 1.
When using these functional instructions in subprograms, note the
following prohibition:
(1) When one of the above functional instructions is being used
within a subprogram and is not yet completed (processing is in
progress), the subprogram call is canceled. (ACT for the CALL
instruction is set to 0.)
The subsequent operation of the above functional
instruction is not guaranteed.
(2) When one of the above functional instructions is being used
within a subprogram and is not yet completed (processing is in
progress), the subroutine is called from another subprogram.
Because the preceding function is being processed,
the subsequent operation of the above functional
instruction is not guaranteed.
When a subprogram using the above functional instructions is called
from more than one place, exclusive control is required. An example of
using the WINDR instruction (low-speed type) is given below.