Samsung S3C2451X User Manual page 228

INTERRUPT CONTROLLER
The interrupt controller has two groups of interrupt sources, and first group has always higher priority than the
other group. Actually, we made this interrupt controller using by two interrupt controllers. The nRIQ of ARM926EJ
is connected with 'AND' of nIRQs of each interrupt controller. The nFIQ is just same.
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
10-2
Specifications and information herein are subject to change without notice.
Figure 10-2. Interrupt group multiplexing Diagram
S3C2451X RISC MICROPROCESSOR