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1745D–ATARM–04-Nov-05
AT91M55800A
• PAGES: Page Size
• TDF: Data Float Output Time
• BAT: Byte Access Type
• CSEN: Chip Select Enable (Code Label EBI_CSEN)
0 = Chip select is disabled.
1 = Chip select is enabled.
• BA: Base Address (Code Label EBI_BA)
These bits contain the highest bits of the base address. If the page size is larger than 1M byte, the unused bits of the base
address are ignored by the EBI decoder.
PAGES Page Size Active Bits in Base Address
Code Label
EBI_PAGES
0 0 1M Byte 12 Bits (31-20) EBI_PAGES_1M
0 1 4M Bytes 10 Bits (31-22) EBI_PAGES_4M
1 0 16M Bytes 8 Bits (31-24) EBI_PAGES_16M
1 1 64M Bytes 6 Bits (31-26) EBI_PAGES_64M
TDF Number of Cycles Added after the Transfer
Code Label
EBI_TDF
0 0 0 0 EBI_TDF_0
0 0 1 1 EBI_TDF_1
0 1 0 2 EBI_TDF_2
0 1 1 3 EBI_TDF_3
1 0 0 4 EBI_TDF_4
1 0 1 5 EBI_TDF_5
1 1 0 6 EBI_TDF_6
1 1 1 7 EBI_TDF_7
BAT Selected BAT
Code Label
EBI_BAT
0 Byte-write access type EBI_BAT_BYTE_WRITE
1 Byte-select access type EBI_BAT_BYTE_SELECT