Motorola MVME2400 Series Wartungshandbuch PDF herunterladen (Seite 56)

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Functional Description

PCI Bus Latency

The following table lists the latency of PCI originated transactions for five

different clock ratios: 5:2, 3:2, 3:1, 2:1, and 1:1. The MVME2400 uses a

3:1 clock ratio:

Table 3-3. PCI Originated Latency Matrix

Transaction

32-bit PCI 64-bit PCI

Clock

Ratio

Beat

Total Beat

Beat

Total

Burst Read9111129111125:2

Burst Write3111631116

Single Read 9 - - - 9 9 - - - 9

Single Write 3 - - - 3 3 - - - 3

Burst Read 12 1 1 1 15 12 1 1 1 15 3:2

Burst Write3111631116

Single Read 12 - - - 12 12 - - - 12

Single Write 3 - - - 3 3 - - - 3

Burst Read9111129111123:1

Burst Write3111631116

Single Read 9 - - - 9 - - - - -

Single Write 3 - - - 3 - - - - -

Burst Read111111411111142:1

Burst Write3111631116

Single Read 11 - - - 11 - - - - -

Single Write 3 - - - 3 - - - - -

Burst Read 16 1 1 1 19 16 1 1 1 19 1:1

Burst Write3111631116

Single Read 16 - - - 16 - - - - -

Single Write 3 - - - 3 - - - - -

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 177 178

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Motorola MVME2400 Series Wartungshandbuch Seite 56