MPC8280 datasheet(405/1386 Pages) FREESCALE

tên linh kiện	MPC8280

Giải thích chi tiết về linh kiện	PowerQUICC??II Family Reference Manual

PDF	1386 Pages

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nhà sản xuất	FREESCALE [Freescale Semiconductor, Inc]

Trang chủ	http://www.freescale.com

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PCI Bridge

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

Freescale Semiconductor

9-97

Figure 9-89. DMA Chain of Segment Descriptors

9.13.2.1

Descriptor in Big-Endian Mode

In big endian mode, the descriptor in 60x memory should be programmed such that data appears in

ascending significant-byte order. If segment descriptors are written to memory located in the 60x bus, they

should be treated like they are translated from big endian to little endian mode.

Source address

Local memory or PCI memory

Reserved

Destination address

Reserved

Next descriptor

Reserved

Byte count

Reserved

0x00

0x04

0x08

0x0C

0x10

0x14

0x18

0x1C

Offset

Source address

Reserved

Destination address

Reserved

Next descriptor

Reserved

Byte count

Reserved

0x00

0x04

0x08

0x0C

0x10

0x14

0x18

0x1C

Offset

Source address

Reserved

Destination address

Reserved

Next descriptor

Reserved

Byte count

Reserved

0x00

0x04

0x08

0x0C

0x10

0x14

0x18

0x1C

Offset

Descriptor 0

Descriptor 1

Descriptor N

(last)

EOTD=1

Current descriptor address register

Next descriptor address register

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