Xilinx ZCU102 User Manual page 91

X-Ref Target - Figure 3-37
The ICM settings for lane functionality must be set consistent with the external U125
Pericom PI2DBS6212 GTR multiplexer settings to provide appropriate functionality on the
connectors wired to the PS-side GTR transceivers. The external GTR multiplexer selection is
controlled by the PS-side I2C0 GPIO port expander (U97) connected to the multiplexer's "S"
input. S = 0 connects the A input to the B output, whereas S = 1, connects the A input to the
C output. The "S" select logic is implemented with GPIO pins to support the settings listed
in Table 3-43.
ZCU102 Evaluation Board User Guide
UG1182 (v1.2) March 20, 2017
Figure 3-37: GTR External Switch Connectivity
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Chapter 3: Board Component Descriptions
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