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Interrupt Controller
MCF5272 ColdFire Integrated Microprocessor User’s Manual, Rev. 3
7-6
Freescale Semiconductor
7.2.3
Interrupt Source Register (ISR)
The interrupt source register (ISR),
Figure 7-6, is used to read the instantaneous value of all interrupt
sources, both internal and external. Note that the register bits give the value of the interrupt source prior
to input synchronization or polarity correction.
31
30
29
28
27
26
25
24
Field
INT1
INT2
INT3
INT4
TMR0
TMR1
TMR2
TMR3
Reset
XXXX_1111
R/W
Read only
23
22
21
20
19
18
17
16
Field
UART1
UART2
PLI_P
PLI_A
USB0
USB1
USB2
USB3
Reset
1111_1111
R/W
Read only
15
14
13
12
11
10
9
8
Field
USB4
USB5
USB6
USB7
DMA
ERx
ETx
ENTC
Reset
1111_1111
R/W
Read only
76
5
4
3
0
Field
QSPI
INT5
INT6
SWTO
—
Reset
1XX1_0000
R/W
Read only
Address
MBAR+0x030
Figure 7-6. Interrupt Source Register (ISR)
Table 7-4. ISR Field Descriptions
Bits
Field
Description
31–4
—
0 Interrupt source is high.
1 Interrupt source is low.
3–0
—
Reserved, should be cleared.