MPC8540 datasheet(913/1302 Pages) FREESCALE

913 / 1302 page

Functional Description

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

Freescale Semiconductor

16-91

Figure 16-76. Split Completion Transaction Address AD[31:0]

Table 16-60 describes the fields of the attribute for Burst and DWORD transactions.

16.4.3.6.3 Completer Attributes

PCI-X split completion transactions include an attribute phase one clock cycle after the address

phase. The completer attribute for a split completion transaction is similar to the burst transaction

attribute. For the split completion attribute, PCI_C/BE[3:0] provide the four msbs of the byte

count and AD[31:0] are driven as shown in Figure 16-77.

Tag

Requester Bus Number

Requester Device Number

Requester Function

Number

Lower Address [6–0]

Table 16-60. Split Completion Transaction Address

Name

Description

31:30

—

Reserved. Must be 00.

Relaxed ordering. The completer copies this field from the RO field of the requester

attributes. Bridges optionally use this to influence transaction ordering.

0 The requester requires that the transaction remain in strict order.

1 The requester guarantees that the transaction is not required to remain in strict order.

28:24

Tag

The completer copies this field from the tag field of the requester attributes. The requester

uses this information to identify the appropriate split completions.

23:16

Requester Bus

Number

The completer copies this field from the requester bus number field of the requester

attributes. The requester uses this information to identify the appropriate split completions.

15:11

Requester

Device Number

The completer copies this field from the requester device number field of the requester

attributes. The requester uses this information to identify the appropriate split completions.

10:8

Requester

Function Number

The completer copies this field from the requester function number field of the requester

attributes. The requester uses this information to identify the appropriate split completions.

—

Reserved. Must be 0.

6:0

Lower Address

The completer copies the 7 lsbs of the split request address if all of the following are true:

• The split request for this sequence is a burst read

• This is the first split completion of the sequence

• The split completion is not a split completion message.

If the split completion is disconnected on an ADB, this field is cleared when the sequence

resumes. If the split request is a DWORD transaction or the split completion is a split

completion message, this field is cleared.

MPC8540 Datasheet(PDF) 913 Page - Freescale Semiconductor, Inc

MPC8540 Datasheet(HTML) 913 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