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Intel® PXA255 Processor Developer’s Manual 6-73
Memory Controller
Table 6-37. BOOT_DEF Bitmap
0x4800_0044 BOOT_DEF Memory Controller
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
reserved
PKG_TYPE
BOOT_SEL
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 * * * *
Bits Name Description
31:4 — reserved
3 PKG_TYPE
PROCESSOR TYPE (read only):
0 – Reserved
1 – PXA255 processor
2:0 BOOT_SEL
BOOT SELECT (read only):
Contains the three inputs pins BOOT_SEL[2:0] for the processor. See Ta bl e 6- 36 .
See Ta b le 6 -38 for valid boot configurations. See Section 6.10.2.2 for descriptions of Boot
Time Configurations.
Table 6-38. Valid Boot Configurations Based on Processor Type
Processor Type
Boot_Sel Signals
Valid Booting Configurations
(PXA255 processor)
000
001
100
101
110
111