Rainbow Electronics W90N740 User Manual
Page 179
W90N740
Publication Release Date: November 26, 2004
- 175 -
Revision A4
AIC Source Control Registers (AIC_SCR1 ~ AIC_SCR18)
Register Address R/W
Description
Reset
Value
AIC_SCR1
0xFFF8.2004 R/W Source Control Register 1
0x0000.0047
AIC_SCR2
0xFFF8.2008 R/W Source Control Register 2
0x0000.0047
y
y y
y
y y
y
y y
y
y y
y
y y
AIC_SCR17 0xFFF8.2044 R/W Source Control Register 17
0x0000.0047
AIC_SCR18 0xFFF8.2048 R/W Source Control Register 18
0x0000.0047
31
30
29
28
27
26
25
24
RESERVED
23
22
21
20
19
18
17
16
RESERVED
15
14
13
12
11
10
9
8
RESERVED
7
6
5
4
3
2
1
0
SRCTYPE RESERVED
PRIORITY
SRCTYPE
[7:6]: Interrupt Source Type
Whether an interrupt source is considered active or not by the AIC is subject to the settings of this
field.
SRCTYPE [7:6]
Interrupt Source Type
0 0 Low-level
Sensitive
0 1 High-level
Sensitive
1 0 Negative-edge
Triggered
1 1 Positive-edge
Triggered
PRIORITY
[2:0]: Priority Level
Every interrupt source must be assigned a priority level during initiation. Among them, priority level 0
has the highest priority and priority level 7 the lowest. Interrupt sources with priority level 0 are
promoted to FIQ. Interrupt sources with priority level other than 0 belong to IRQ. For interrupt sources
of the same priority level, that located in the lower channel number has higher priority.