Xilinx Virtex-6 FPGA User Manual page 177

Table 3-32: TX Configurable Driver Attributes (Cont'd)
Attribute
TX_DRIVE_MODE
TX_MARGIN_FULL_0[6:0]
TX_MARGIN_FULL_1[6:0]
TX_MARGIN_FULL_2[6:0]
TX_MARGIN_FULL_3[6:0]
TX_MARGIN_FULL_4[6:0]
TX_MARGIN_LOW_0[6:0]
TX_MARGIN_LOW_1[6:0]
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Virtex-6 FPGA GTX Transceivers User Guide
UG366 (v2.5) January 17, 2011
Type
String This attribute selects whether PCI Express PIPE Spec pins or TX Drive
Control pins control the TX driver. The default is "DIRECT".
DIRECT: TXBUFFDIFFCTRL, TXDIFFCTRL, and TXPOSTEMPHASIS
control the TX driver settings.
PIPE: TXDEEMPH, TXMARGIN, and TXSWING control the TX driver
settings.
7-bit This attribute has the value of TXBUFFDIFFCTRL[2:0] and
Binary TXDIFFCTRL[3:0] that has to be mapped when TXMARGIN = 000 and
TXSWING = 0. TX_MARGIN_FULL_0 = TXBUFDIFFCTRL[2:0],
TXDIFFCTRL[3:0]. The default is 7'b1001110 (1040 mV
Do not modify this value.
7-bit This attribute has the value of TXBUFFDIFFCTRL[2:0] and
Binary TXDIFFCTRL[3:0] that has to be mapped when TXMARGIN = 001 and
TXSWING = 0. TX_MARGIN_FULL_1 = TXBUFDIFFCTRL[2:0],
TXDIFFCTRL[3:0]. The default is 7'b1001001 (850 mV
Do not modify this value.
7-bit This attribute has the value of TXBUFFDIFFCTRL[2:0] and
Binary TXDIFFCTRL[3:0] that has to be mapped when TXMARGIN = 010 and
TXSWING = 0. TX_MARGIN_FULL_2 = TXBUFDIFFCTRL[2:0],
TXDIFFCTRL[3:0]. The default is 7'b1000101 (515 mV
Do not modify this value.
7-bit This attribute has the value of TXBUFFDIFFCTRL[2:0] and
Binary TXDIFFCTRL[3:0] that has to be mapped when TXMARGIN = 011 and
TXSWING = 0. TX_MARGIN_FULL_3 = TXBUFDIFFCTRL[2:0],
TXDIFFCTRL[3:0]. The default is 7'b1000010 (290 mV
Do not modify this value.
7-bit This attribute has the value of TXBUFFDIFFCTRL[2:0] and
Binary TXDIFFCTRL[3:0] that has to be mapped when TXMARGIN = 100 and
TXSWING = 0. TX_MARGIN_FULL_4 = TXBUFDIFFCTRL[2:0],
TXDIFFCTRL[3:0]. The default is 7'b1000000 (130 mV
Do not modify this value.
7-bit This attribute has the value of TXBUFFDIFFCTRL[2:0] and
Binary TXDIFFCTRL[3:0] that has to be mapped when TXMARGIN = 000 and
TXSWING = 1. TX_MARGIN_LOW_0 = TXBUFDIFFCTRL[2:0],
TXDIFFCTRL[3:0]. The default is 7'b1000110 (590 mV
Do not modify this value.
7-bit This attribute has the value of TXBUFFDIFFCTRL[2:0] and
Binary TXDIFFCTRL[3:0] that has to be mapped when TXMARGIN = 001 and
TXSWING = 1. TX_MARGIN_LOW_1 = TXBUFDIFFCTRL[2:0],
TXDIFFCTRL[3:0]. The default is 7'b1000100 (445 mV
Do not modify this value.
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TX Configurable Driver
Description
PPD
PPD
PPD
PPD
PPD
PPD
PPD
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