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LAN9221 Datasheet(PDF) 37 Page - SMSC Corporation

Part # LAN9221
Description  High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

LAN9221 Datasheet(HTML) 37 Page - SMSC Corporation

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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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