Xilinx 7 Series User Manual page 128

Chapter 4: Receiver
Table 4-2: RX AFE Attributes (Cont'd)
TERM_RCAL_OVRD
RXLPM_INCM_CFG
RXLPM_IPCM_CFG
Use Modes—RX Termination
Table 4-3: Use Mode 1—RX Termination
X-Ref Target - Figure 4-3
128
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Attribute
Use External AC Term
Mode Coupling Voltage
1 On Gnd
BOARD
~100 nF
~100 nF
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Type
3-bit Binary Selects whether the external 100Ω precision resistor
connected to the MGTRREF pin or an override
value is used, as defined by TERM_RCAL_CFG
[14:0]. This feature is intended for internal use only.
1-bit Binary 1'b1 = Enable high common mode operation
1'b0 = Disable high common mode operation
1-bit Binary 1'b1 = Enable low common mode operation
1'b0 = Disable low common mode operation
Max Swing Suggested Protocols and
mV
DPP
Attribute Settings:
• RX_CM_SEL[1:0] = 2'b01
1,200
• RXLPM_INCM_CFG = 1'b0
• RXLPM_IPCM_CFG = 1'b1
FPGA
ACJTAG RX
MGTAVTT
50Ω
50Ω
MGTAVTT
ACJTAG RX
Figure 4-3: Use Mode 1
7 Series FPGAs GTP Transceivers User Guide
Description
Usage Notes
RX_CM_SEL [1:0] = 2'b01
GND
UG482_c4_03_020613
UG482 (v1.9) December 19, 2016