SNLA389B October   2022  – April 2024 DP83TC812R-Q1 , DP83TC812S-Q1 , DP83TC813R-Q1 , DP83TC813S-Q1 , DP83TC814R-Q1 , DP83TC814S-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Hardware Configuration
    1. 2.1 Schematic
  6. 3Software Configuration
  7. 4Testing PMA
    1. 4.1 PMA Testing Procedure
  8. 5Testing IOP: Link-up and Link-down
    1. 5.1 IOP Testing Procedure
  9. 6Testing SQI
    1. 6.1 SQI Value Interpretation
  10. 7Testing TDR
    1. 7.1 TDR Testing Procedure
  11. 8Testing EMC and EMI
  12. 9Revision History

2.1 Schematic

Schematics and the right components for MDI, reference clock, and power network are critical for the performance of 100Base-T1 PHY. This section captures the recommended schematics and component values used during OA TC-1 testing. For TC10 operation, the wake pin must be pulled to a logic high state.

GUID-20211202-SS0I-308Z-MM8L-HFLFFV9NTNVT-low.svg Figure 2-1 Power Supply Network: For Applications With Sleep Mode Requirement (DP83TC812)
GUID-20220503-SS0I-HHGJ-H5MD-BC5HPFH7V2BQ-low.svg Figure 2-2 Power Supply Network: For Applications With Sleep Mode Requirement (DP83TC813)
GUID-20220422-SS0I-T2HZ-QLVR-QX80SHWN8BLD-low.svg Figure 2-3 Power Supply Network: For Applications Without Sleep Mode Requirement (DP83TC812 and DP83TC814)
GUID-20220503-SS0I-HLB5-CFSR-6JHKFJBLHQLF-low.svg Figure 2-4 Power Supply Network: For Applications Without Sleep Mode Requirement (DP83TC813)
GUID-20220425-SS0I-JKBQ-PHCS-NQ64RMSVSTSW-low.svgFigure 2-5 Typical TC-10 Application With Peripheral (DP83TC812 and DP83TC813)
GUID-20220422-SS0I-NZZ3-JSV3-DLMTLRFNT0KN-low.svg Figure 2-6 Typical DP83TC814 Application With Peripheral
GUID-20220422-SS0I-JL4R-P6VX-KHTPDQXBVNTZ-low.svgFigure 2-7 MDI and Crystal Schematic
Table 2-1 Parameters, Components, and Values
PARAMETER | COMPONENT VALUE
VDDIO | VDDMAC 1.8 V, 2.5 V, or 3.3 V
De-Coupling Capacitors VDDIO 10 nF
De-Coupling Capacitors VDDMAC 10 nF, 470 nF
Combined Ferrite Bead for VDDIO | VDDMAC(1) BLM18KG601SH1
VDDA 3.3 V
De-Coupling Capacitors VDDA 10 nF, 470 nF
(Optional): Ferrite Bead for VDDA BLM18KG601SH1
Vsleep 3.3 V
De-Coupling Capacitors Vsleep

0.1 μF
DC Blocking Capacitors (1% accurate, 100 V) 0.1 μF
Common-Mode Choke

DLW43MH201XK2L, DLW32MH201XK2, AE2002, ACT1210L-201
Common-Mode Termination Resistors (1% accurate, 0.75 W, Size: 2010) 1 kΩ
MDI Coupling Capacitor 4.7 nF
ESD Shunt (5% accurate, 0.125 W, Size: 0805 100 kΩ
Isolation Resistor 1 (0.25 W, Size: 1206) 0 Ω
Isolation Resistor 2 (0.25 W, Size: 1206) 0 Ω
Isolation Capacitor Not populated
R_XI 100 Ω
R_XO Minimum required for crystal wattage specification
ESD (Optional) ESD Devices qualified by Open Alliance 100BASE-T1 EMC Test Specification for ESD suppression devices with load capacitance < 5 pF can be used
1.

If VDDIO is separate from VDDMAC, then additional ferrite bead and a 0.47-μF capacitor are required on VDDIO. This ferrite bead has the same component number: BLM18KG601SH1.