Revision 1.02 – January 11, 2005
Data Sheet
Address Map Support
The PPC405CR incorporates two simple and separate address maps. The first address map defines the possible
use of address regions that the processor can access. The second address map is for Device Configuration Regis-
ters (DCRs). The DCRs are accessed by software running on the PPC405CR processor through the use of
mtdcr
and
mfdcr
instructions.
Table 1. System Memory Address Map (4GB System Memory)
Function
General Use
Boot-up
Subfunction
SDRAM and External Peripherals
Note:
Any of the address ranges listed at
right may be use for any of the above
functions.
Peripheral Bus Boot
1
UART0
UART1
Internal Peripherals
IIC0
OPB Arbiter
GPIO Controller Registers
Start Address
0x00000000
0xF0000000
0xFFE00000
0xEF600300
0xEF600400
0xEF600500
0xEF600600
0xEF600700
End Address
0xEF5FFFFF
0xFFFFFFFF
0xFFFFFFFF
0xEF600307
0xEF600407
0xEF60051F
0xEF60063F
0xEF60077F
Size
3830MB
256MB
2MB
8B
8B
32B
64B
128B
Notes:
1. When peripheral bus boot is selected, Peripheral bank 0 is automatically configured at reset to the address range listed above.
2. After the boot process, software may reassign the boot memory region for other uses.
3. All address ranges not listed above are reserved.
Table 2. DCR Address Map
Function
Total DCR Address Space
1
Reserved
Memory Controller Registers
External Bus Controller Registers
Decompression Controller Registers
Reserved
PLB Registers
Reserved
OPB Bridge Out Registers
Reserved
Clock, Control, and Reset
Power Management
Interrupt Controller
Reserved
DMA Controller Registers
Reserved
Notes:
1. DCR address space is addressable with up to 10 bits (1024 or 1K unique addresses). Each unique address represents a single 32-bit
(word) register, or 1 kiloword (KW) (which equals 4 KB).
Start Address
0x000
0x000
0x010
0x012
0x014
0x016
0x080
0x090
0x0A0
0x0A8
0x0B0
0x0B8
0x0C0
0x0D0
0x100
0x140
End Address
0x3FF
0x00F
0x011
0x013
0x015
0x07F
0x08F
0x09F
0x0A7
0x0AF
0x0B7
0x0BF
0x0CF
0x0FF
0x13F
0x3FF
Size
1KW (4KB)
1
16W
2W
2W
2W
106W
16W
16W
8W
8W
8W
8W
16W
48W
64W
704W
6
AMCC
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
