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Download Intel PXA26X Laptop User Manual
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Memory Controller 6.11.2.2 Boot-Time Configurations The boot time configurations are shown in Figure 6-31 – Figure 6-33. A boot from a single 32Mbit SMROM with nWORD = 1 is not supported. For the PXA260, BOOT_SEL[2:0] must be set appropriately for the boot ROM. For the PXA261 and PXA262, BOOT_SEL[2:0] must be 0b001. For the PXA263, BOOT_SEL[2:0] must be 0b000. Three Configuration registers are affected at reset – MSC0:RBW0, MDREFR:E0PIN/K0RUN, and SXCNFG. Figure 6-31. Asynchronous Boot Time Configurations and Register Defaults BOOT_SEL[2:0] = 000 MSC0 32 Asynchronous 7FF0 7FF0 RBW0 = 0 32-bit ROM SXCNFG 0004 0004 MDREFR 03CA 4FFF E0PIN = 0, K0RUN = 0 BOOT_SEL[2:0] = 001 MSC0 16 7FF0 7FF8 Asynchronous RBW0 = 1 16-bit ROM SXCNFG 0004 0004 MDREFR 03CA 4FFF E0PIN = 0, K0RUN = 0 BOOT_SEL[2:0] = 000 SXMRS 0000 0000 BOOT_SEL[2:0] = 001 SXMRS 0000 0000 Intel® PXA26x Processor Family Developer’s Manual 6-73
