System Integration Unit (SIU)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
6-116
Freescale Semiconductor
The SIU contains an overrun request for each IRQ and one combined overrun request which is the logical
OR of the individual overrun requests. Only the combined overrun request is used in the device, and the
individual overrun requests are not connected.
Each IRQ pin has a programmable filter for rejecting glitches on the IRQ signals. The filter length for the
IRQ pins is specified in the external IRQ digital filter register (SIU_IDFR).
Figure 6-158. SIU DMA/Interrupt Request Diagram
6.4.4
GPIO Operation
All GPIO functions for the device are provided by the SIU. Each device pad that has a GPIO signal has a
pin configuration register (PCR) in the SIU where the GPIO function is selected. In addition, each device
GPIO signal has an input data register (SIU_GPDI
n
) and an output data register (SIU_GPDO
n
).
6.4.5
Internal Multiplexing
The internal multiplexing select registers (SIU_ETISR, SIU_EIISR, and SIU_DISR) select the input
source for the following components:
•
eQADC external trigger input signals
•
SIU external interrupt request signals
•
DSPI signals used for chaining serial and parallel DSPI modules
Interrupt
controller
DMA/
interrupt
select
•
•
•
•
•
0
1
2
3
4
15
IMUX
Interrupt
request
DMA
request
DMA
•
•
•
0
1
15
SIU_OSR
SIU_EISR
Overrun
request
EIRQ pins
or
internal
source
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Interrupt
request
SIU_DISR
SIU
Содержание MPC5565
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