MPC8540 datasheet(914/1302 Pages) FREESCALE

914 / 1302 page

MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1

16-92

Freescale Semiconductor

PCI/PCI-X Bus Interface

Figure 16-77. AD[31:0] During PCI-X Split Completion Attribute Phase

Table 16-61 describes the fields of the completer attribute for PCI-X split completion transactions.

16.4.3.6.4 Split Completion Messages

For PCI-X split completion transactions that include a split completion error or split completion

message, the transaction has a single DWORD data phase with the format shown in Figure 16-78.

Figure 16-78. PCI-X Split Completion Message Format

BCM

SCE

SCM

00000

Completer Bus Number

Completer Device Number

Completer Function

Number

Lower Byte Count

Table 16-61. PCI-X Split Completion Transaction Attribute Summary

Name

Description

BCM

Byte count modified. The completer must set BCM if the byte count is less than the full

remaining byte count of the transaction. If the byte count is the full byte count of the split

request, the completer clears BCM.

SCE

Split completion error. The completer sets this bit to indicate the transaction is a split

completion message that includes an error message.

SCM

Split completion message. The completer clears this bit if the split completion contains read

data. The completer sets this bit if the split completion contains a split completion message.

28:24

—

Reserved. Must be 00000

23:16

Completer

Bus Number

The completer bus number attribute is supplied by the bus number field in the PCI-X status

15:11

Completer

Device Number

The completer device number attribute is supplied by the device number field in the PCI-X

status register.

10:8

Completer

Function Number

The completer function number is assigned to the function in the completer by design.

7:0

Lower Byte

Count

For a split completion attribute phase, PCI_C/BE[3:0] is concatenated with AD[7:0] to

create a 12-bit byte count. The byte count indicates the number of bytes remaining in the

sequence.

Message Class

Message Index

Remaining Lower

Address

Remaining Lower Address

(cont.)

Remaining Byte Count

MPC8540 Datasheet(PDF) 914 Page - Freescale Semiconductor, Inc

MPC8540 Datasheet(HTML) 914 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL