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PowerQUICC II Register Programming
The internal registers of the MPC8272 must be programmed after hard reset as described
in the following sections. The addresses and programming values are in hexadecimal base.
For more information about the this topic in the following sections of this chapter, see the
MPC8272 PowerQUICC II TM Family Reference Manual .
6.2.1
System Initialization
The power-on reset configuration word is set in the BCSR or Flash or in the E 2 PROM .
There are two configuration words: one for the BCSR and Flash (when it is assigned to
CS0) and the other to the E 2 PROM ( when it is assigned to CS0) . The two configurations are
detailed in Table 6-3 and Table 6-4, respectively.
Table 6-3. BCSR/Flash Power On Reset Configuration 1
Flash
Address
[hex]
0
8
10
18
Init
Value[hex]
0C
72
36
5A
Description
Internal arbitration, Internal memory controller, Core enabled, Single PowerQUICC
II, 32 Bit boot port size, Exceptions vectored to 0xFFFxxxxx, Internal space 64 bit
slave for external master.
IRQ signals configured as BADDRx lines, DP(1:7) configured as IRQ I/F and
IRQ(6:7),Initial internal space @ 0x0F000000
Boot memory space @ 0xFE000000 - 0xFFFFFFFF, ABB/IRQ2 pin is ABB,
DBB/IRQ3 pin is DBB, No masking on bus request lines, Local bus pins function as
PCI, PCI is boot master, AP(1;3) configured as BNKSEL(0:2), APE configured as
IRQ5.
CS10 configured as BCTL1
1
Programmed into the Flash (E 2 PROM) memory in addresses 0x0, 0x8, 0x10 & 0x18
Table 6-4. E 2 PROM Power On Reset Configuration 1
EEPROM
Address
[hex]
0
8
10
18
Init
Value[hex]
04
72
36
5A
Description
Internal arbitration, Internal memory controller, Core enabled, Single PowerQUICC
II (60X Bus mode b ), 8 Bit Boot size, Exceptions vectored to 0xFFFxxxxx, Internal
space 64 bit slave for external master.
IRQ signals configured as BADDRx lines, DP(1:7) configured as IRQ I/F and
IRQ(6:7),Initial internal space @ 0x0F000000
Boot memory space @ 0xFE000000 - 0xFFFFFFFF, ABB/IRQ2 pin is ABB,
DBB/IRQ3 pin is DBB, No masking on bus request lines, Local bus pins function as
PCI, PCI i s boo t master, AP(1;3) configured as BNKSEL(0:2), APE configured as
IRQ7 and CS11 as CS11.
CS10 configured as BCTL1
MPC8272ADS User Guide
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