7I90HD 18
OPERATION
EEPROM LAYOUT
The EEPROMs used on the 7I90HD for configuration storage are Micron M25P80's.
The M25P80 is a 8 M bit (1 M byte) EEPROM with sixteen 64K byte sectors. Configuration
files are stored on sector boundaries to allow individual configuration file erasing and
updating. Standard EEPROM sector layout is as follows:
0x000000
BOOT BLOCK
0x010000
FALLBACK CONFIGURATION BLOCK 0
0x020000
FALLBACK CONFIGURATION BLOCK 1
0x030000
FALLBACK CONFIGURATION BLOCK 2
0x040000
FALLBACK CONFIGURATION BLOCK 3
0x050000
FALLBACK CONFIGURATION BLOCK 4
0x060000
FALLBACK CONFIGURATION BLOCK 5
0x070000
RESERVED
0x080000
USER CONFIGURATION BLOCK 0
0x090000
USER CONFIGURATION BLOCK 1
0x0A0000
USER CONFIGURATION BLOCK 2
0x0B0000
USER CONFIGURATION BLOCK 3
0x0C0000
USER CONFIGURATION BLOCK 4
0x0D0000
USER CONFIGURATION BLOCK 5
0x0E0000
UNUSED/FREE
0x0F0000
UNUSED/FREE
