9.12.9 PolarFire SOC MSS I/O Attributes

These I/O attributes are valid only for MSS I/Os and are read only in the I/O Editor. These MSS I/O attributes appear on the right side of the default I/O attributes and will be visible even when there is no MSS being used in the design.

Reference Clock

The following table lists the MSS I/O attributes in the I/O Editor for Reference CLK.

Table 9-13. MSS I/O Attributes and Values for Reference CLK
MSS I/O AttributesValues
MSS Resistor PullNone, Up
MSS Clamp DiodeOFF, ON
MSS PersistOFF, ON
MSS User I/O Lock DownOFF, ON
MSS Odt (Ohm)OFF, 100
MSS Thevenin (Ohm)OFF, 150, 75, 50
MSS Schmitt TriggerOFF, ON

Peripheral I/Os

The following table lists the MSS I/O attributes in the I/O Editor for Peripheral I/Os.
Table 9-14. MSS I/O Attributes and Values for Peripheral I/Os
MSS I/O AttributesValues
MSS Resistor PullNone, Up, Down, Hold
MSS Clamp DiodeOFF, ON
MSS PersistOFF, ON
MSS User I/O Lock DownOFF, ON
MSS Schmitt TriggerSchmitt Trigger is always ON for 1.2, 1.5 and 1.8 V I/O Bank values. Otherwise, it can be either ON or OFF. The MSS Schmitt Trigger can have the following values:

OFF, ON

MSS Low Power Mode Input ReceiverOFF, ON
MSS Low Power Mode Output BufferOFF, ON
MSS Output Drive (mA)1.5, 2, 3, 3.5, 4, 6, 8, 10, 12, 16, 20, 24, 27, 30, 34, 40, 48, 60

DDR I/Os

The following table lists the MSS I/O attributes in the I/O Editor for DDR I/Os.

Based on the memory type used, the memory types have the following values.

Table 9-15. ODT DQ and ODT DQS Ports
Memory TypeValue
DDR3/DDR3L120, 60, 40, 30
DDR4120, 80, 60, 40, 30
LPDDR3240, 120, 80, 60, 40, 30
LPDDR4120, 80, 60, 48, 40
Table 9-16. Outdrive for DQ and DM Ports, DQS Ports, CLK Ports, ADD/CMD Ports
Memory TypeValue (mA)
DDR3/DDR3L48, 34, 30, 24
DDR460, 48, 34, 27
LPDDR360, 48, 40, 34
LPDDR460, 48, 40, 34

SGMII I/Os

The following table lists the MSS I/O attributes in the I/O Editor for SGMII.

Table 9-17. MSS I/O Attributes and Values for SGMII
MSS I/O AttributesValues
MSS Resistor PullNone, Up, Down, Hold
MSS Odt (Ohm)OFF, 100
MSS Vcm Input RangeMID, LOW
MSS Source Termination (Ohm)OFF, 100
MSS Output Drive (mA)1.5, 2, 3, 3.5, 4, 6