MPFS250T datasheet(87/128 Pages) MICROCHIP

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11. For data rates greater than 10.3125 Gbps, VDDA must be set to 1.05 V mode. See supply tolerance in

the section Recommended Operating Conditions.

12. THGSTATE is based on the condition where the CDR was in lock (to reference or data) for at least 5.2 μs

before moving to the high-gain state. At this point, if the receive data is outside the ppm tolerance of

the CDR, the CDR will unlock after the time specified by the parameter.

13. The following definitions apply:

a. TCDRREF is the transceiver CDR reference clock period in nanoseconds.

b. WXCVRFABRX is the parallel interface width of the transceiver receive fabric interface.

c. CDRFBDIV is the feedback divider of the transceiver.

d. CDRCDRREFDIV is the reference divider of the transceiver CDR.

14. For details on the Enhanced Receiver Management feature, refer to UG0677: PolarFire FPGA Transceiver

User Guide.

6.5.6

Transceiver and Receiver Return Loss Characteristics

This section describes transmitter and receiver return loss characteristics compliant with OIF-CEI-03.1.

Figure 4 • Differential Return Loss

Table 92 • Differential Return Loss

Unit

Value

Parameter

–8

MHz

100

(3/4) * T_Baud

T_Baud

Microsemi Proprietary and Confidential. DS0147 Revision 1.0

AC Switching Characteristics

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