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MPFS250T 数据表(PDF) 17 Page - Microchip Technology |
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MPFS250T 数据表(HTML) 17 Page - Microchip Technology |
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17 / 128 page  Unit Max Min Symbol Parameter ms 50 0.2 VDD_XCVR_CLK Transceiver reference clock supply ms 50 0.2 XCVRVREF Global VREF for transceiver reference clocks Note: For proper operation of programming recovery mode, if a VDD supply brownout occurs during programming, a minimum supply ramp down time for only the VDD supply is recommended to be 10 ms or longer by using a programmable regulator or on-board capacitors. 5.2.2.2 Hot Socketing The following table lists the hot socketing DC characteristics over recommended operating conditions. Table 13 • Hot Socketing DC Characteristics over Recommended Operating Conditions Condition Unit Max Typ Min Symbol Parameter VDDA = 0 V mA ±4 XCVRRX_HS Current per transceiver Rx input pin (P or N single-ended) 1 , 2 VDDA = 0 V mA ±10 XCVRTX_HS Current per transceiver Tx output pin (P or N single-ended) 3 VDD_XCVR_CLK = 0 V mA ±1 XCVRREF_HS Current per transceiver refer- ence clock input pin (P or N sin- gle-ended) 4 VDDIx = 0 V mA ±1 IGPIO_HS Current per GPI- O pin (P or N single-ended) 5 Hot socketing is not supported in HSIO. Current per HSI- O pin (P or N single-ended) 1. Assumes device is powered-down, all supplies are grounded, AC-coupled interface, and input pin pairs are driven by a CML driver at the maximum amplitude (1 V pk–pk) that is toggling at any rate with PRBS7 data. 2. Each P and N transceiver input has less than the specified maximum input current. 3. Each P and N transceiver output is connected to a 40 Ω resistor (50 Ω CML termination—20% tolerance) to the maximum allowed output voltage (VDDAmax + 0.3 V = 1.4 V) through an AC-coupling capacitor with all PolarFire SoC device supplies grounded. This shows the current for a worst-case DC coupled interface. As an AC-coupled interface, the output signal will settle at ground and no hot socket current will be seen. 4. VDD_XCVR_CLK is powered down and the device is driven to –0.3 V < VIN < VDD_XCVR_CLK. 13 Microsemi Proprietary and Confidential. DS0147 Revision 1.0 DC Characteristics |
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