System Integration Unit (SIU)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
6-110
Freescale Semiconductor
The following table describes the chip configuration fields:
Table 6-136. SIU_CCR Field Descriptions
Bits
Name
Description
0–13
—
Reserved
14
MATCH
Compare register match. Holds the value of the match input signal to the SIU. The
match input is asserted if the values in the SIU_CARH/SIU_CARL and
SIU_CBRH/SIU_CBRL are equal. The MATCH bit is reset by the synchronous reset
signal.
0
The contents of SIU_CARH and SIU_CARL does not match the contents of
SIU_CBRH and SIU_CBRL
1
The contents of SIU_CARH and SIU_CARL matches the contents of SIU_CBRH
and SIU_CBRL
15
DISNEX
Disable Nexus. Holds the value of the Nexus disable input signal to the SIU. When
system reset negates, the value in this bit depends on the censorship control word and
the boot configuration bits.
0
Nexus disable input signal is negated.
1
Nexus disable input signal is asserted.
16–29
—
Reserved
30
CSRE
The CRSE bit enables the suppression of reflection from the EBI’s calibration bus onto
the non-calibration bus. The EBI drives some outputs to both the calibration and
non-calibration busses. When CRSE is asserted, the values driven onto the calibration
bus are not reflected onto the non-calibration bus pins. When CRSE is negated, the
values driven onto the calibration bus are reflected onto the non-calibration bus. CRSE
only enables reflection suppression for the non-calibration bus pins that do not have a
negated state to which the pins return at the end of the access. CRSE does not enable
reflection suppression for the non-calibration bus pins that have a negated state to
which the pins return at the end of an access. Those reflections always are
suppressed. Furthermore, the suppression of reflections from the non-calibration bus
onto the calibration bus is not enabled by CRSE. Those reflections also always are
suppressed.
0
Calibration reflection suppression is enabled.
1
Calibration reflection suppression is disabled.
31
Reserved
Содержание MPC5565
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