Xilinx SelectIO 7 Series User Manual

7 Series FPGAs SelectIO Resources User Guide www.xilinx.com 95
UG471 (v1.10) May 8, 2018
Supported I/O Standards and Terminations
PPDS (Point-to-Point Differential Signaling)
PPDS is a differential I/O standard for next-generation LCD interface row and column
drivers. PPDS inputs require a parallel-termination resistor, either through the use of a
discrete resistor on the PCB, or by using the 7 series FPGAs DIFF_TERM attribute to enable
internal termination. PPDS is only available in HR I/O banks and requires a V
CCO
voltage
level of 2.5V. The IOSTANDARD is called PPDS_25. Table 1-50 summarizes all the possible
PPDS I/O standards and attributes supported.
TMDS (Transition Minimized Differential Signaling)
TMDS is a differential I/O standard for transmitting high-speed serial data used by the
DVI and HDMI video interfaces. The TMDS standard requires external 50Ω pull-up
resistors to 3.3V on the inputs. TMDS inputs do not require differential input termination
resistors. TMDS is only available in HR I/O banks and requires a V
CCO
voltage level of
3.3V. The IOSTANDARD is called TMDS_33. Table 1-52 summarizes all the possible TMDS
I/O standards.
Table 1-49: Available I/O Bank Type
HR HP
Available N/A
Table 1-50: Allowed Attributes of the PPDS I/O Standard
Attributes
Primitives
IBUFDS, IBUFGDS,
IBUFDS_DIFF_OUT, or
IBUFGDS_DIFF_OUT
OBUFDS or OBUFTDS
IOSTANDARD
PPDS_25
DIFF_TERM TRUE, FALSE N/A
Table 1-51: Available I/O Bank Type
HR HP
Available N/A
Table 1-52: Allowed Attributes of the TMDS I/O Standard
Attributes
Primitives
IBUFDS, IBUFGDS,
IBUFDS_DIFF_OUT, or
IBUFGDS_DIFF_OUT
OBUFDS or OBUFTDS
IOSTANDARD
TMDS_33
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Xilinx SelectIO 7 Series Specifications

General

Brand	Xilinx
Model	SelectIO 7 Series
Category	Computer Hardware
Language	English