Xilinx RocketIO User Manual

RocketIO™ Transceiver User Guide www.xilinx.com 129
UG024 (v3.0) February 22, 2007
Timing Parameters
R
Timing Parameters
Parameter designations are constructed to reflect the functions they perform, as well as the
I/O signals to which they are synchronous. The following subsections explain the meaning
of each of the basic timing parameter designations used in the tables.
Setup/Hold Times of Inputs Relative to Clock
Basic Format:
ParameterName_SIGNAL
where
ParameterName = T with subscript string defining the timing relationship
SIGNAL = name of RocketIO signal synchronous to the clock
ParameterName Format:
T
GxCK
= Setup time before clock edge
T
GCKx
= Hold time after clock edge
where
x = C (Control inputs)
D (Data inputs)
Setup/Hold Time (Examples):
T
GCCK
_RRST/T
GCKC
_RRST Setup/hold times of RX Reset input
relative to rising edge of RXUSRCLK2
T
GDCK
_TDAT/T
GCKD
_TDAT Setup/hold times of TX Data inputs
relative to rising edge of TXUSRCLK2
Clock to Output Delays
Basic Format:
ParameterName_SIGNAL
where
ParameterName = T with subscript string defining the timing relationship
SIGNAL = name of RocketIO signal synchronous to the clock
ParameterName Format:
T
GCKx
= Delay time from clock edge to output
where
x =CO (Control outputs)
DO (Data outputs)
ST (Status outputs)
Output Delay Time (Examples):
T
GCKCO
_CHBO Rising edge of RXUSRCLK to Channel Bond outputs
T
GCKDO
_RDAT Rising edge of RXUSRCLK2 to RX Data outputs
T
GCKST
_TBERR Rising edge of TXUSRCLK2 to TX Buffer Err output
Product Not Recommended for New Designs

Xilinx RocketIO Specifications

General

Brand	Xilinx
Model	RocketIO
Category	Transceiver
Language	English