Freescale Semiconductor PowerQUICC MPC885 Reference Manual page 293

Table 10-2 describes IMMR fields.
Bits Name
0–15 ISB Internal space base. Defines the base address of the internal memory space. At reset, ISB can
be configured to one of four addresses and changed to any value by the software. The number
of programmable ISB bits and the resolution of the location of internal space depends on the
implementation's internal memory space. In the MPC885, all 16 bits can be programmed.
Chapter 2, "Memory Map,"
Configuration Word,"
16–23 PARTNUM Part number (read-only). Mask programmed with a code corresponding to the part number of
the MPC885. Intended to help factory test and user code that is sensitive to part refinements.
PARTNUM would change if a new module is added or if the size of the memory module is
revised. However, it would not change if the part is revised to fix a bug in an existing module.
24–31 MASKNUM Mask number. (read-only) Mask programmed with a code corresponding to the mask number
of the MPC885. Intended to help factory test and user code that is sensitive to part refinements.
For the latest documentation on part/revision numbers and microcode REV_NUMs, see the MPC885
Website at www.freescale.com.
10.4.2 SIU Module Configuration Register (SIUMCR)
The SIU module configuration register (SIUMCR) contains bits that configure the following features in
the SIU:
• External bus arbitration
• External master support
• Debug and test port configuration
• System interface pin configuration
0 1
Field EARB
n
Reset
R/W
Addr
16 17
Field —
Reset
R/W
Addr
Freescale Semiconductor
Table 10-2. MMR Field Descriptions
describes the internal memory map.
describes available and default initial values.
3 4
EARP —
000_0001_0
(IMMR & 0xFFFF0000) + 0x000
18 19 20 21 22
MPRE MLRC AEME SEME BSC
0000_0000_0000_0000
(IMMR & 0xFFFF0000) + 0x002
Figure 10-3. SIU Module Configuration Register (SIUMCR)
MPC885 PowerQUICC Family Reference Manual, Rev. 2
Description
Section 11.3.1.1, "Hard Reset
7 8 9 10
DSHW DBGC
n
R/W
23 24 25 26
GB5E B2DD B3DD
R/W
System Interface Unit
11 12 13 14 15
DBPC — FRC DLK
n
000
27 28 31
—
10-5