Supported Use Models For Each Pma Mode; Table 3-2: Supported Use Models - Xilinx RocketIO X User Manual

Clock Domain Architecture

Supported Use Models for Each PMA Mode

The use models discussed in the previous section work for certain PMA modes. In some
PMA modes, a BREFCLK use model is not available because the reference clock exceeds
the DCM CLKIN maximum frequency. Other use models can only be run with the DCM in
high frequency mode, and in some cases the DCM can only meet the speed in higher speed
grades when the serial rate can be met in a lower speed grade. These restrictions are shown
in
optimum serial rate for that specific mode. There might be further restrictions if the serial
rates are run at rates other than the optimum rate (e.g., PMA Mode 11_32 optimum rate is
10.313 Gb/s but it can be run at 8 Gb/s).

Table 3-2: Supported Use Models

PMA
MODE
6_32
6_64
8_32
8_64
10_32
10_64
12_40
12_80
13_40 BREFCLK 1:1:1, TXOUTCLK 1:1:1, RXRECCLK 1:1:1
13_80 BREFCLK 2:2:1, TXOUTCLK 2:2:1, RXRECCLK 2:2:1
14_40 BREFCLK 0:1:1, TXOUTCLK 1:1:1, RXRECCLK 1:1:1
14_80 BREFCLK 2:2:1, TXOUTCLK 2:2:1, RXRECCLK 2:2:1
15_32
15_64
16_32 BREFCLK 1:1:1, TXOUTCLK 1:1:1, RXRECCLK 1:1:1 DCM must be in HF mode
16_64 BREFCLK 2:2:1, TXOUTCLK 2:2:1, RXRECCLK 2:2:1 DCM must be in HF mode
17_32 BREFCLK 0:1:1, TXOUTCLK 1:1:1, RXRECCLK 1:1:1
17_64 BREFCLK 1:2:1, TXOUTCLK 2:2:1, RXRECCLK 2:2:1
18_40
18_80
19_40 BREFCLK 2:1:1*, TXOUTCLK 1:1:1, RXRECCLK 1:1:1 DCM must be in HF mode
19_80
20_40 BREFCLK 2:1:1*, TXOUTCLK 1:1:1, RXRECCLK 1:1:1 DCM must be in HF mode
20_80
RocketIO™ X Transceiver User Guide
UG035 (v1.5) November 22, 2004
Table 3-2. Note that these use models and DCM specifications were selected for the
Clocking Use Model Name
TXOUTCLK 1:1:1, RXRECCLK 1:1:1
TXOUTCLK 2:2:1, RXRECCLK 2:2:1
TXOUTCLK 1:1:1, RXRECCLK 1:1:1
TXOUTCLK 2:2:1, RXRECCLK 2:2:1
TXOUTCLK 1:1:1, RXRECCLK 1:1:1
TXOUTCLK 2:2:1, RXRECCLK 2:2:1
TXOUTCLK 1:1:1, RXRECCLK 1:1:1
TXOUTCLK 2:2:1, RXRECCLK 2:2:1
TXOUTCLK 1:1:1, RXRECCLK 1:1:1
TXOUTCLK 2:2:1, RXRECCLK 2:2:1 DCM must be in HF mode
TXOUTCLK 1:1:1, RXRECCLK 1:1:1
TXOUTCLK 2:2:1, RXRECCLK 2:2:1
TXOUTCLK 2:2:1, RXRECCLK 2:2:1
TXOUTCLK 2:2:1, RXRECCLK 2:2:1
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Comment/Restrictions
R
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