System Configuration and Protection
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
6-35
6.2.2.2.6
SIU Interrupt Mask Register 3 (SIMASK3)
6.2.2.2.7
SIU Interrupt Edge Level Register (SIEL)
The SIEL is a 32-bit read/write register. Each pair of bits corresponds to an external interrupt request. The
EDx bit, if set, specifies that a falling edge in the corresponding IRQ line will be detected as an interrupt
request. When the EDx bit is 0, a low logical level in the IRQ line will be detected as an interrupt request.
The WMx (wake-up mask) bit, if set, indicates that an interrupt request detection in the corresponding line
causes the MPC561/MPC563 to exit low-power mode.
6.2.2.2.8
SIU Interrupt Vector Register (SIVEC)
The SIVEC is a 32-bit read-only register that contains an 8-bit code representing the unmasked interrupt
source of the highest priority level. The SIVEC can be read as either a byte, half word, or word. When read
as a byte, a branch table can be used in which each entry contains one instruction (branch). When read as
a half-word, each entry can contain a full routine of up to 256 instructions. The interrupt code is defined
such that its two least significant bits are 0, thus allowing indexing into the table. The two possible ways
of the code usage are shown on
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field
IMB
IRQ20
IMB
IRQ21
IMB
IRQ22
IMB
IRQ23
IRQ
6
LVL
6
IMB
IRQ24
IMB
IRQ25
IMB
IRQ26
IMB
IRQ27
IRQ
7
LVL
7
IMB
IRQ28
IMB
IRQ29
IMB
IRQ30
IMB
IRQ31
SRESET
0000_0000_0000_0000
Addr
0x2F C04C
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
—
SRESET
0000_0000_0000_0000
Figure 6-20. SIU Interrupt Mask Register 3 (SIMASK3)
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field ED0 WM0 ED1 WM1 ED2 WM2 ED3 WM3 ED4 WM4 ED5 WM5 ED6 WM6 ED7 WM7
HRESET
0000_0000_0000_0000
Addr
0x2F C018
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
—
HRESET
0000_0000_0000_0000
Figure 6-21. SIU Interrupt Edge Level Register (SIEL)
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...