Tews Technologies TPMC816, Руководство пользователя

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TPMC816 V.2.1 User Manual Issue 2.1.0 Page 17 of 22
5.3 Big / Little Endian
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PCI – Bus (Little Endian)
Byte 0 AD[7..0]
Byte 1 AD[15..8]
Byte 2 AD[23..16]
Byte 3 AD[31..24]
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Every Local Address Space (0...3) and the Expansion ROM Space can programmed to operate in
Big or Little Endian Mode.
Big Endian Little Endian
32 Bit 32 Bit
Byte 0 D[31..24] Byte 0 D[7..0]
Byte 1 D[23..16] Byte 1 D[15..8]
Byte 2 D[15..8] Byte 2 D[23..16]
Byte 3 D[7..0] Byte 3 D[31..24]
16 Bit upper lane 16 Bit
Byte 0 D[31..24] Byte 0 D[7..0]
Byte 1 D[23..16] Byte 1 D[15..8]
16 Bit lower lane
Byte 0 D[15..8]
Byte 1 D[7..0]
8 Bit upper lane 8 Bit
Byte 0 D[31..24] Byte 0 D[7..0]
8 Bit lower lane
Byte 0 D[7..0]
Table 5-2 : Local Bus Little/Big Endian