2 the, Retimer, gn2405a, 3 channel – ADLINK aTCA-N700 User Manual

Page 33: Configuration

aTCA-RN720 User's Guide

• Loss of Signal (LOS): the device can control the de-assert threshold and the hysteresis

for the LOS. The detailed setting may be found from the following list of tables in the
datasheet.
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Table 5-2: LOS Range Settings

Table 5-3: LOS Threshold Control Register Addresses

Table 5-4: LOS De-assert Threshold Positive & LOS De-assert Threshold Negative

Setting Register Address

Table 5-5: LOS Hysteresis Setting Register Addresses

Table 5-6: Typical LOS Threshold Settings (Range Select = Low, Hysteresis = 2)

Table 5-7: Typical LOS Threshold Settings (Range Select = High, Hysteresis = 2)

Table 5-8: LOS Indicator Register Addresses

• Channel Power Down and Output Enable/Disable: the device can control the channel

power down and output driver enable/disable via the I2C.Setting details can be found
from the following tables in the datasheet.
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Table 5-9: Channel Power Down Enable/Disable Register Addresses

Table 5-10: Output Driver Disable/Enable Register Addresses

• Data Rate Detection/Selection Enable/Disable: the device can configure either a

manual data rate selection or an automatic data rate selection, which has also an
enable/disable option. Setting details can be found from the following tables in the
datasheet.
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Table 5-11: Recommended Register Settings for Infiniband

Table 5-12: Lock Period Control Settings

Table 5-13: Rate Period Control Settings

Table 5-14: Automatic Data Rate Detection Enable/disable & Manual Data Rate

Setting

Table 5-15: Automatic Data Rate Detect Block Power Down Register Addresses

Table 5-16: Clock Divider Block Power Down Register Addresses

• Bypass Enable/Disable: the device can configure the input to bypass the internal

module and to go to the output directly which may be useful during test phase.

• Loop Bandwidth Control: the device can configure the Loop bandwidth of ranges

20MHz to 40MHz.

• Output Swing Control: the typical output swing range is in 385 mV

ppD

~ 1050 mV

ppD

in ten

steps.

• Output Mute Override: the output can be muted with an override enable/disable option.

• Output De-emphasis: Depending on the channel characteristics, the output de-

emphasis level can be adjusted. The post-tap de-emphasis range is 0 ~ 350 mV

ppD

and

the pre-tap de-emphasis range is 0 ~ 350 mV

ppD.

• Output Polarity Invert: The output signal polarity can be inverted with a register setting.

• Loss-of-Lock (LOL): The status of the PLL lock is visible through a register.