Chapter 1: Hardware Description
Vital Product Data (VPD)No VPD has been defined for the 4538.
Additional information concerning
The FLASH EEPROM Boot Memory
The boot memory is a 4Mx8 AMD 29LV033 FLASH EEPROM device, placed in the 60x bus byte lane 0. This
Depending on the FLASH memory size, the mapping of the boot firmware will be different. There are three requirements:
•The Reset configuration must be mapped at the beginning of the FLASH memory.
•The initial vector table must be mapped at address 0xFFF00000. This address is never in the FLASH memory, but it will wrap onto its last MB.
•The FLASH Memory is organized in sectors. The reset configuration word and the vector table must be preserved; therefore their entire sectors will be reserved.
The various elements are/must then be mapped as follows (the FLASH addresses are obtained by masking the local address with the flash size: for a 4MB flash device it is 0x003FFFFF).
The flash is mapped from 0xFF800000 to 0xFFFFFFFF (8MByte space). For a 4MB device, the second 4MB space will cover the first one (see below : first and second map).
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4538 Hardware Reference Manual | 29 |