DS647 Datasheet, PDF (2/5 Pages) Xilinx, Inc – LogiCORE IP Utility Differential

LogiCORE IP Utility Differential Signaling Buffer (v1.01a)
Functional Description
The Utility Differential Signaling Buffer core generates corresponding buffers to bring off-chip differential signals
into or out from internal circuits. Figure 1 illustrates the Utility Differential Signaling Buffer in a system.
X-Ref Target - Figure 1
Utility Differential
Signaling Buffer
Peripheral
DS647_01_012407
Figure 1: Utility Differential Signaling Buffer in a System
I/O Signals
The Utility Differential Signaling Buffer I/O signals are listed and described inTable 1.
Table 1: I/O Signals
Signal Interface I/O
Default Value
IBUF_DS_P None
I Positive (master) port of the differential input signal: used only for IBUFDS or IBUFGDS.
IBUF_DS_N None
I Negative (slave) port of the differential input signal: used only for IBUFDS or IBUFGDS.
IBUF_OUT None
O Single ended output signal: used only for IBUFDS or IBUFGDS.
OBUF_IN
None
I Single ended input signal: used only for OBUFDS.
OBUF_DS_P None
O Positive (master) port of the differential output signal, used only for OBUFDS.
OBUF_DS_N None
O Negative (slave) port of the differential output signal: used only for OBUFDS.
IOBUF_DS_P None
I/O Positive (master) port of the differential input signal: used only for IOBUFDS.
IOBUF_DS_N None
I/O Negative (slave) port of the differential input signal: used only for IOBUFDS.
IOBUF_IO_T None
I 3-state enable input: used only for IOBUFDS.
IOBUF_IO_I None
I 3-state buffer input: used only for IOBUFDS.
IOBUF_IO_O None
O 3-state buffer output: used only for IOBUFDS.
Design Parameters
The Utility Differential Signaling Buffer parameters are listed and described in Table 2.
Table 2: Utility Differential Signaling Buffer Parameters
Parameter
Description
Type
C_SIZE
The vector size of differential signal (valid value is 1 to 128).
integer
C_BUF_TYPE The differential signaling buffer to be instantiated (valid values are IBUFDS, IBUFGDS, OBUFDS, string
IOBUFDS, IBUFDSGTXE, and IBUFDSGTE).
DS647 January 18, 2012
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Product Specification