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LAN9221 Datasheet(PDF) 37 Page - SMSC Corporation |
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LAN9221 Datasheet(HTML) 37 Page - SMSC Corporation |
37 / 151 page High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O Datasheet SMSC LAN9221/LAN9221i 37 Revision 2.6 (12-04-08) DATASHEET Figure 3.3 FIFO Access Byte Ordering BIG ENDIAN (FPORTEND = 1 for Data FIFO port access on addresses 00h-3Ch) AND/OR (FSELEND = 1 for Data FIFO direct access when FIFO_SEL=1) 0 1 2 3 0 7 8 15 16 23 31 24 3 2 1 0 0 7 8 15 A[1] = 0 A[1] = 1 MSB LSB HOST DATA BUS INTERNAL FIFO ORDER 0 1 2 3 0 1 2 3 0 7 8 15 0 7 8 15 16 23 31 24 A[1] = 0 A[1] = 1 MSB LSB HOST DATA BUS INTERNAL FIFO ORDER WORD_SWAP != FFFF_FFFFh LITTLE ENDIAN (FPORTEND = 0 for Data FIFO port access on addresses 00h-3Ch) AND/OR (FSELEND = 0 for Data FIFO direct access when FIFO_SEL=1) BIG ENDIAN (FPORTEND = 1 for Data FIFO port access on addresses 00h-3Ch) AND/OR (FSELEND = 1 for Data FIFO direct access when FIFO_SEL=1) 0 1 2 3 0 7 8 15 16 23 31 24 1 0 3 2 0 7 8 15 A[1] = 0 A[1] = 1 MSB LSB HOST DATA BUS INTERNAL FIFO ORDER 0 1 2 3 2 3 0 1 0 7 8 15 0 7 8 15 16 23 31 24 A[1] = 0 A[1] = 1 MSB LSB HOST DATA BUS INTERNAL FIFO ORDER WORD_SWAP = FFFF_FFFFh LITTLE ENDIAN (FPORTEND = 0 for Data FIFO port access on addresses 00h-3Ch) AND/OR (FSELEND = 0 for Data FIFO direct access when FIFO_SEL=1) |
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