System Interface Unit (SIU)
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
4-36 Freescale Semiconductor
4.3.2.7 Internal Memory Map Register (IMMR)
The internal memory map register (IMMR), shown in Figure 4-29, contains identification of a specific
device as well as the base address for the internal memory map. Software can deduce availability and
location of any on-chip system resources from the values in IMMR. PARTNUM and MASKNUM are
mask programmed and cannot be changed for any particular device.
Table4-13 describes IMMR f ields.
18 LPBSE Local bus parity byte select enable.
0 Parity byte select is disabled. LGPL4 output of UPM is available for memory control.
1 Parity byte select is enabled. LGPL4 pin is used as local bus parity byte select output from the
PowerQUICCII.
19–31 Reserved, should be cleared.
014 15
Field ISB
Reset Depends on reset configuration sequence. See Section5.4.1, “Hard Reset Configuration Word.”
R/W R/W
Addr 0x0x101A8
16 23 24 31
Field PARTNUM MASKNUM
Reset 0x0011 (.29µm Rev A.1); 0x0023 (.29µm Rev B.3); 0x0024 (.29µm Rev C.2); 0x0060 (.25µm Rev A.0)
R/W R
Addr 0x101AA
Figure4-29. Internal Memory Map Register (IMMR)
Table4-12. SIUMCR Register Field Descriptions (continued)
Bits Name Description