3.2.5 Loss-of-Signal Detector

Loss-of-signal (LOS) detector (LOW and HIGH value) sets the requirement of the voltage detector. The following table lists the upper and lower set points for a LOS to ensure that a good signal is applied into the receiver. Referring to data sheet Loss-of-Signal detect, Peak Detect Range (VDETLOW), below the Peak Detect Range minimum value setting is interpreted as “no signal” and above the maximum number will interpreted as “signal”. In between the minimum and maximum values are considered indeterminate.

Table 3-2. LOS Range
SettingRange
PCIEPreset PCIe low threshold setting = 1

For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .

Preset PCIe high threshold setting = 2 For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .
SATAPreset SATA low threshold setting = 2 For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .
Preset SATA high threshold setting = 3 For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .
0For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .
1For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .
2For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .
3For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .
4For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .
5For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .
6For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .
7For Min and MAX values of VDETLOW, see respective PolarFire FPGA Datasheet or PolarFire SoC Datasheet .

Software defaults to LOS-Low = 1 and LOS-High = 3.