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FMC XM101 User Guide
UG538 (v1.1) September 24, 2010
Chapter 1:
XM101
4. Silicon Labs Si570 Clock Sources
The Silicon Labs Si570 serial IIC bus programmable clock source provides a low-jitter clock
with a user-programmable output frequency from 10 to 810 MHz.
U1 and U2 Si570 are located at IIC address 0x5D and are accessed through the U4 PCA9543
IIC bus switch as described in
.
U1 and U2 Si570 components are factory programmed with parameters in
.
For additional information on this component, including reprogramming the clock
frequency through the IIC serial bus interface, consult the manufacturer's data sheet at:
The U1 and U2 Si570 output clocks to J1 FMC HPC connections are shown in
.
Table 1-11:
Characteristics of Si570 Component
Si570 Characteristic
XM101
Output Format
LVDS
Output Enable Polarity
High
Temperature Stability
50 ppm
Frequency Range
10–810 MHz
Six-Digit Startup Frequency
156.250 MHz
Power Supply
3.3V
IIC Address
x5D
Table 1-12:
Si570 to FMC HPC Connections
Si570
J1 FMC
Connector
Net Name
Pin Number
Pin Number
CLK0_M2C_P
U1.4
H4
CLK0_M2C_N
U1.5
H5
CLK2_M2C_P
U2.4
K4
CLK2_M2C_N
U2.5
K5
Summary of Contents for FMC XM101 LVDS QSE
Page 1: ...FMC XM101 LVDS QSE Card User Guide UG538 v1 1 September 24 2010 ...
Page 4: ...4 www xilinx com FMC XM101 User Guide UG538 v1 1 September 24 2010 ...
Page 6: ...6 www xilinx com FMC XM101 User Guide UG538 v1 1 September 24 2010 Preface About This Guide ...
Page 22: ...22 www xilinx com FMC XM101 User Guide UG538 v1 1 September 24 2010 Chapter 1 XM101 ...