System Integration Unit (SIU)
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 6-115
6.3.1.164 Chip Configuration Register (SIU_CCR)
The SIU_CCR controls the chip configuration for enabling and disabling Nexus and selecting the
calibration bus signals on the external bus interface.
Figure 6-164. Chip Configuration Register (SIU_CCR)
The following table describes the chip configuration fields:
Address: Base + 0x0980 Access: R/W
012345678910111213 14 15
R00000000000000MATCHDISNEX
W
Reset00000000000000 0 X
1
1
When system reset negates, the value in this bit depends on the censorship control word and the boot configuration
bits.
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R00000000000000
CSRE TEST
W
Reset00000000000000 0 0
Table 6-153. 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
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