S3C4510B Datasheet, PDF (390/422 Pages) Samsung semiconductor – Samsungs S3C4510B 16/32-bit RISC microcontroller is a cost-effective, high-performance microcontroller solution for Ethernet-based systems.

INTERRUPT CONTROLLER
S3C4510B
INTERRUPT PRIORITY REGISTERS
The interrupt priority registers, INTPRI0–INTPRI5, contain information about which interrupt source is assigned to
the pre-defined interrupt priority field. Each INTPRIn register value determines the priority of the corresponding
interrupt source. The lowest priority value is priority 0, and the highest priority value is priority 20.
The index value of each interrupt source is written to one of the above 21 positions (see Figure 13-4). The
position value then becomes the written interrupt's priority value. The index value of each interrupt source is
listed in Table 13-1.
Register
INTPRI0
INTPRI1
INTPRI2
INTPRI3
INTPRI4
INTPRI5
Table 13-5. Interrupt Priority Register Overview
Offset Address
0x400C
0x4010
0x4014
0x4018
0x401C
0x4020
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Interrupt priority register 0
Interrupt priority register 1
Interrupt priority register 2
Interrupt priority register 3
Interrupt priority register 4
Interrupt priority register 5
Reset Value
0x03020100
0x07060504
0x0B0A0908
0x0F0E0D0C
0x13121110
0x00000014
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
INTPRI0 0 0 0 PRIORITY3 0 0 0 PRIORITY2 0 0 0 PRIORITY1 0 0 0 PRIORITY0
INTPRI1 0 0 0 PRIORITY7 0 0 0 PRIORITY6 0 0 0 PRIORITY5 0 0 0 PRIORITY4
INTPRI2 0 0 0 PRIORITY11 0 0 0 PRIORITY10 0 0 0 PRIORITY9 0 0 0 PRIORITY8
INTPRI3 0 0 0 PRIORITY15 0 0 0 PRIORITY14 0 0 0 PRIORITY13 0 0 0 PRIORITY12
INTPRI4 0 0 0 PRIORITY19 0 0 0 PRIORITY18 0 0 0 PRIORITY17 0 0 0 PRIORITY16
INTPRI5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 PRIORITY20
High Priority
Low Priority
Low
Priority
High
Priority
Figure 13-4. Interrupt Priority Register (INTPRIn)
13-6