W925EP01 Datasheet, PDF (48/108 Pages) Winbond – 8-BIT CID MICROCONTROLLER

W925EP01/ W925EP01FG
RNGF
FDRF
ALGOF
DTMFDF
FSF
D
System clock
R
Clear by software
CIDF
Figure 6-4 The Structure of CID Flags
Priority Level Structure
There are two priority levels for the interrupts, high and low. The interrupt sources can be individually
set to either high or low levels. Naturally, a higher priority interrupt cannot be interrupted by a lower
priority interrupt. However there exists a pre-defined hierarchy amongst the interrupts themselves.
This hierarchy comes into play when the interrupt controller has to resolve simultaneous requests
having the same priority level. This hierarchy is defined as shown below; the interrupts are numbered
starting from the highest priority to the lowest.
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