53
TR10a-LPQ User Manual
December
10,
2018
trigger
)
iXCVR0_REFCLK
iXCVR1_REFCLK
iMEM_REFCLK
input
Setting Si5340A Output Channel
Frequency Value
oPLL_REG_CONFIG_DONE
output
Si5340 Configuration status
(0: Configuration in Progress, 1:
Configuration Complete)
I2C_DATA
inout
I2C Serial Data to/fromSi5340A
I2C_CLK
output I2C Serial Clock to Si5340A
As shown in
, Si5340A control IP have preset several output
frequency parameters, if users want to change frequency, users can fill in the input ports
" iXCVR0_REF_CLK", " iXCVR1_REF_CLK" and " iMEM0_REF_CLK" with desired
frequency values and recompile the project. For example, in the components Si5340A,
change
.iXCVR0_REFCLK(`XCVR_REF_644M53125),
to
.iXCVR0_REFCLK(`XCVR_REF_322M265625),
Recompile project, the Si5340A OUT0 channel (for QSFP+) output frequency will
change from 644.53125Mhz to 322.26562Mhz.
Table 4-2 Si5340A Controller Reference Clock Frequency Setting for QSFP+
iXCVR0_REFCLK
iXCVR1_REFCLK
Input Setting
Si5340A Channel Clock Frequency (MHz)
4'h0
644.53125
4'h1
322.265625
4'h2
250
4'h3
125
4'h4
100
Table 4-3 Si5340A Controller Reference Clock Frequency Setting for Memory
iMEM_REFCLK
Input Setting
Si5340A Channel Clock Frequency (MHz)