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Renesas SH7781 User Manual

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13. PCI Controller (PCIC)

Rev.1.00 Jan. 10, 2008 Page 638 of 1658
REJ09B0261-0100

MSB

31

0

LSB

SHwy data

PCI bus data

1. Little endian

A' B' C' D' A

B

C

A' B' C' D' A

B

C

D

D

A

B

C D

PCI_Addr[2] = 1

PCI_Addr[2] = 0

MSB

31

0

LSB

SHwy data

PCI bus data

2. Big endian

D C B

A

D' C' B' A'

A

B

C D A' B' C' D'

A

B

C

PCI_Addr[2] = 1

PCI_Addr[2] = 0

Note: PCIAddr[2]: PCI

bus

AD[2]

D

Buffer data

Buffer data

Figure 13.8 Endian Conversion from SuperHyway Bus to PCI Local Bus

(Byte Swapping: TBS = 1)