Figure 103 Fabric Ddr Memory Settings; Figure 104 Selecting I/O Standard As Lvcmos18 Or Lpddri - Microchip Technology Microsemi SmartFusion2 User Manual

Fabric DDR Subsystem
Figure 103 • Fabric DDR Memory Settings
3. For only LPDDR memory, the I/O standard and I/O calibration settings are available as shown in
Figure 84 on page
• Select I/O standard as LVCMOS18 or LPDDRI.
Note: If LVCMOS18 is selected, all IOs are configured to LVCMOS1.8 except CLK/CLK_N.CLK and CLK_N
are configured to LPDDRI standard as they are differential signals.
• Select I/O calibration as ON or OFF. If I/O calibration is selected as ON, then the Smartfusion2
FDDR_IMP_CALIB pin must be pulled down with a resistor. For resistor values refer to
Impedance Calibration section in
Figure 104 • Selecting I/O Standard as LVCMOS18 or LPDDRI
161.
DS0115: SmartFusion2 Pin Descriptions Datasheet.
Microsemi ProprietaryUG0446 User Guide Revision 7.0 187