ADLINK aTCA-N700 - Manual (Page 32)

aTCA-RN710 User's Guide
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6.2 The Retimer, GN2405A
The GN2405A architecture is illustrated in Figure 6-2, showing quad entities for both RX and TX. The
features of the GN2405A are summarized as follows:
• Quad Datacom Repeater / Retimer supporting four RX lanes and four TX lanes
• Continuous rate operation from 9.95Gb/s to 11.3Gb/s
• Support for 2.5Gb/s and 5Gb/s data rates
• Compensate for up to 28dB of loss
• Integrated 6dB equalizer at input
• On chip 100Ω differential I/O termination
• I
2 C Control Interface
Figure 6-2 GN2405 Block diagram
The retimers are configured through an I2C bus. As can be seen in Figure 6-3, the configuration I2C
bus is from the Zone 3 connector connects to the PCA9547 I2C HUB to reach to the retimers.
The retimers on the RTM I2C bus always function as a slave.