UPD784938 Datasheet, PDF (581/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 23 INTERRUPT FUNCTIONS
Figure 23-29. Macro Service Data Transfer Processing Flow (Type C) (2/2)
1
Ring control?
No
Yes
Decrement ring counter
Ring counter = 0?
No
Yes
Increment MPD?
No
Yes
Subtract modulo register
contents from data macro
service pointer (MPD), and
return pointer to start address
Add modulo register contents
to data macro service pointer
(MPD), and return pointer to
start address
Load modulo register
contents into ring counter
MSC ← MSC–1
MSC = 0?
No
Yes
Clear (to 0) interrupt
service mode bit (ISM)
VCIE = 1?
No
Yes
Clear (to 0) interrupt
request flag (IF)
End
End
(Vectored interrupt request generation)
Preliminary User’s Manual U13987EJ1V0UM00
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