SFFS030 October   2024 DP83TC812R-Q1 , DP83TG720S-Q1

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
  5. 3Failure Mode Distribution (FMD)
  6. 4Pin Failure Mode Analysis (Pin FMA)

4 Pin Failure Mode Analysis (Pin FMA)

This section provides a failure mode analysis (FMA) for the pins of the DP83TG720x-Q1. The failure modes covered in this document include the typical pin-by-pin failure scenarios:

  • Pin short-circuited to ground (see Table 4-2)
  • Pin open-circuited (see Table 4-3)
  • Pin short-circuited to an adjacent pin (see Table 4-4)
  • Pin short-circuited to VDDIO (see Table 4-5)
  • Pin short-circuited to VDD1P0 (see Table 4-6)
  • Pin short-circuited to VDDA (see Table 4-7)
  • Pin short-circuited to VSLEEP (see Table 4-8)

Table 4-2 through Table 4-8 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 4-1.

Table 4-1 TI Classification of Failure Effects
ClassFailure Effects
APotential device damage that affects functionality.
BNo device damage, but loss of functionality.
CNo device damage, but performance degradation.
DNo device damage, no impact to functionality or performance.

Figure 4-1 shows the DP83TG720S-Q1 pin diagram. For a detailed description of the device pins, see the Pin Configuration and Functions section in the DP83TG720S-Q1 data sheet.

DP83TG720S-Q1 DP83TG720R-Q1 DP83TG720S-Q1 Pin Diagram Figure 4-1 DP83TG720S-Q1 Pin Diagram
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
MDC 1 No SMI communication is available. B
INT_N 2 No valid interrupt status. B
RESET_N 3 Device in reset state. B
XO 4 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown. A
XI 5 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown. B
LED_1/GPIO_1 6 LED_1/GPIO_1 is not operational. A
VSLEEP 7 Device is disabled. Core supply is short. B
WAKE 8 Device is unable to locally wake from sleep state. B
VDD1P0 9 Device is disabled. Core supply is short. B
INH 10 Inhibit is not operational. B
VDDA 11 Device is disabled. Core supply is short. B
TRD_P 12 Link and data transfer cannot occur. Device can be damaged. A
TRD_M 13 Link and data transfer cannot occur. Device can be damaged. A
STRAP_1 14 PHY address can strap incorrectly. B
RX_CTRL 15 PHY address can strap incorrectly. Valid data cannot be sent to MAC. Device can be damaged. A
CLKOUT/GPIO_2 16 CLKOUT/GPIO_2 is not operational. Device can be damaged. A
DNC 17 Device can be damaged. A
DNC 18 No issue. D
DNC 19 No issue. D
DNC 20 No issue. D
VDD1P0 21 Device is disabled. Core supply is short. B
VDDIO 22 Device is disabled. Core supply is short B
RX_D3/RX_M 23 Valid data cannot be sent to MAC. Device can be damaged. A
RX_D2/RX_P 24 Valid data cannot be sent to MAC. Device can be damaged. A
RX_D1 25 Valid data cannot be sent to MAC. Device can be damaged. A
RX_D0 26 Valid data cannot be sent to MAC. Device can be damaged. A
RX_CLK 27 Valid data cannot be sent to MAC. Device can be damaged. A
TX_CLK 28 Valid data cannot be received. B
TX_CTRL 29 Valid data cannot be received. B
TX_D3 30 Valid data cannot be received. B
TX_D2 31 Valid data cannot be received. B
TX_D1/TX_P 32 Valid data cannot be received. B
TX_D0/TX_M 33 Valid data cannot be received. B
VDDIO 34 Device is disabled. Core supply is short. B
LED_0/GPIO_0 35 LED_0/GPIO_0 is not operational. Master and slave strap is sampled as slave. Device can be damaged. A
MDIO 36 No SMI communication is available. Device can be damaged. A
DAP GND Appropriate connection. D
Table 4-3 Pin FMA for Device Pins Open-Circuited
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
MDC 1 No SMI communication is available. B
INT_N 2 Interrupt is not available. B
RESET_N 3 Normal operation. D
XO 4 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown. B
XI 5 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown B
LED_1/GPIO_1 6 LED_1/GPIO_1 is not operational. PHY enters autonomous mode. B
VSLEEP 7 Device is disabled. VSLEEP supply is open. B
WAKE 8 Wake functionality is lost. B
VDD1P0 9 Device is disabled. VDD1P0 supply is open. B
INH 10 Inhibit is not operational. B
VDDA 11 Device is disabled. Core supply is open. B
TRD_P 12 Link and data transfer cannot occur. B
TRD_M 13 Link and data transfer cannot occur. B
STRAP_1 14 PHY address can strap incorrectly. B
RX_CTRL 15 PHY address can strap incorrectly. Valid data cannot be sent to MAC. B
CLKOUT/GPIO_2 16 CLKOUT/GPIO_2 is not operational. B
DNC 17 No issue. D
DNC 18 No issue. D
DNC 19 No issue. D
DNC 20 No issue. D
VDD1P0 21 Device is disabled. VDD1P0 supply is open. B
VDDIO 22 Device is disabled. VDDIO supply is open. B
RX_D3/RX_M 23 Valid data cannot be sent to MAC. B
RX_D2/RX_P 24 Valid data cannot be sent to MAC. B
RX_D1 25 Valid data cannot be sent to MAC. B
RX_D0 26 Valid data cannot be sent to MAC. B
RX_CLK 27 Valid data cannot be sent to MAC. B
TX_CLK 28 Valid data cannot be received. B
TX_CTRL 29 Valid data cannot be received. B
TX_D3 30 Valid data cannot be received. B
TX_D2 31 Valid data cannot be received. B
TX_D1/TX_P 32 Valid data cannot be received. B
TX_D0/TX_M 33 Valid data cannot be received. B
VDDIO 34 Device is disabled. VDDIO supply is open. B
LED_0/GPIO_0 35 LED_0/GPIO_0 is not operational. Master and slave strap is sampled as slave. B
MDIO 36 No SMI communication is available. B
DAP GND Ground is open. B
Table 4-4 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
Pin Name Pin No. Shorted to Description of Potential Failure Effects Failure Effect Class
MDC 1 INT_N No SMI communication is available. No valid interrupt status. B
INT_N 2 RESET_N When the device intends to give an interrupt, the device enters reset, and when the host resets the PHY, the host is ISR triggered. B
RESET_N 3 XO Device keeps resetting. B
XO 4 XI Device is in an unknown state. B
XI 5 LED_1/GPIO_1 Device is in an unknown state. B
LED_1/GPIO_1 6 VSLEEP Device can be damaged. A
VSLEEP 7 WAKE Wake functionality is lost. B
WAKE 8 VDD1P0 Wake functionality is lost. B
VDD1P0 9 INH Inhibit is not operational. B
INH 10 VDDA Inhibit is not operational. B
VDDA 11 TRD_P Link and data transfer cannot occur. Device can be damaged. A
TRD_P 12 TRD_M Link and data transfer cannot occur. B
TRD_M 13 STRP_1/GPIO_6 Link and data transfer cannot occur. B
STRP_1/GPIO_6 14 RX_CTRL Valid data cannot be sent to MAC. B
RX_CTRL 15 CLKOUT/GPIO_2 Valid data cannot be sent to MAC. CLKOUT/GPIO_2 is not functional. B
CLKOUT/GPIO_2 16 DNC Device can be damaged. A
DNC 17 DNC Device can be disabled. B
DNC 18 DNC No issue. D
DNC 19 DNC No issue. D
DNC 20 VDD1P0 Device can be damaged. A
VDD1P0 21 VDDIO Device can be damaged. A
VDDIO 22 RX_D3/RX_M Valid data cannot be sent to MAC. Device can be damaged. A
RX_D3/RX_M 23 RX_D2/RX_P MAC interface selection can be corrupt. Valid data cannot be sent to MAC. B
RX_D2/RX_P 24 RX_D1 MAC interface selection can be corrupt. Valid data cannot be sent to MAC. B
RX_D1 25 RX_D0 MAC interface selection can be corrupt. Valid data cannot be sent to MAC. B
RX_D0 26 RX_CLK MAC interface selection can be corrupt. Valid data cannot be sent to MAC. B
RX_CLK 27 TX_CLK Valid data cannot be exchanged with MAC. B
TX_CLK 28 TX_CTRL Valid data cannot be received. B
TX_CTRL 29 TX_D3 Valid data cannot be received. B
TX_D3 30 TX_D2 Valid data cannot be received. B
TX_D2 31 TX_D1/TX_P Valid data cannot be received. B
TX_D1/TX_P 32 TX_D0/TX_M Valid data cannot be received. B
TX_D0/TX_M 33 VDDIO Valid data cannot be received. B
VDDIO 34 LED_0/GPIO_0 Valid data cannot be received. B
LED_0/GPIO_0 35 MDIO No SMI communication is available. B
MDIO 36 MDC No SMI communication is available. B
Table 4-5 Pin FMA for Device Pins Short-Circuited to VDDIO
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
MDC 1 No SMI communication is available. B
INT_N 2 No valid interrupt status. B
RESET_N 3 The device can never be reset. B
XO 4 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown. A
XI 5 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown. B
LED_1/GPIO_1 6 LED_1/GPIO_1 is not operational. Device enters standby mode. Need register write to start link-up. Device can be damaged. A
VSLEEP 7 PHY not powering up is possible if VDDIO < 3.3V. B
WAKE 8 The device not entering sleep state is possible. B
VDD1P0 9 Device can be damaged. A
INH 10 Inhibit is not operational. B
VDDA 11 The device not powering up is possible. B
TRD_P 12 Link and data transfer cannot occur. Device can be damaged. A
TRD_M 13 Link and data transfer cannot occur. Device can be damaged. A
STRAP_1 14 PHY address can strap incorrectly. B
RX_CTRL 15 PHY address can strap incorrectly. Valid data cannot be sent to MAC. B
CLKOUT/GPIO_2 16 CLKOUT/GPIO_2 is not operational. B
DNC 17 Device can be damaged. A
DNC 18 Device can be damaged. A
DNC 19 Device can be damaged. A
DNC 20 Device can be damaged. A
VDD1P0 21 Device can be damaged. A
VDDIO 22 No issue. D
RX_D3/RX_M 23 Valid data cannot be sent to MAC. Device can be damaged. A
RX_D2/RX_P 24 Valid data cannot be sent to MAC. Device can be damaged. A
RX_D1 25 Valid data cannot be sent to MAC. Device can be damaged. A
RX_D0 26 Valid data cannot be sent to MAC. Device can be damaged. A
RX_CLK 27 Valid data cannot be sent to MAC. Device can be damaged. A
TX_CLK 28 Valid data cannot be received. B
TX_CTRL 29 Valid data cannot be received. B
TX_D3 30 Valid data cannot be received. B
TX_D2 31 Valid data cannot be received B
TX_D1/TX_P 32 Valid data cannot be received. B
TX_D0/TX_M 33 Valid data cannot be received. B
VDDIO 34 No issue. D
LED_0/GPIO_0 35 LED_0/GPIO_0 is not operational. Master and slave strap is sampled as master. Device can be damaged. A
MDIO 36 No SMI communication is available. Device can be damaged. A
DAP GND Device can be damaged. A
Table 4-6 Pin FMA for Device Pins Short-Circuited to VDD1P0
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
MDC 1 No SMI communication. Device can be damaged. A
INT_N 2 Device can be damaged A
RESET_N 3 The device entering reset state is possible. B
XO 4 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown. B
XI 5 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown. B
LED_1/GPIO_1 6 LED_1/GPIO_1 is not operational, Device can enter standby mode. Need register write to start link-up. B
VSLEEP 7 Device does not power-up. B
WAKE 8 Device does not go into sleep state. B
VDD1P0 9 Appropriate connection. D
INH 10 Inhibit is not operational. B
VDDA 11 Device can be damaged. A
TRD_P 12 Link and data transfer cannot occur. Device can be damaged. A
TRD_M 13 Link and data transfer cannot occur. Device can be damaged. A
STRAP_1 14 PHY address can strap incorrectly. B
RX_CTRL 15 PHY address can strap incorrectly. Valid data cannot be sent to MAC. B
CLKOUT/GPIO_2 16 CLKOUT/GPIO_2 is not operational. B
DNC 17 Device can be damaged. A
DNC 18 Device can be damaged. A
DNC 19 Device can be damaged. A
DNC 20 Device can be damaged. A
VDD1P0 21 Appropriate connection. D
VDDIO 22 The device not powering up is possible. B
RX_D3/RX_M 23 Valid data cannot be sent to MAC. Device can be damaged. A
RX_D2/RX_P 24 Valid data cannot be sent to MAC. Device can be damaged. A
RX_D1 25 Valid data cannot be sent to MAC. Device can be damaged. A
RX_D0 26 Valid data cannot be sent to MAC. Device can be damaged. A
RX_CLK 27 Valid data cannot be sent to MAC. Device can be damaged. A
TX_CLK 28 Valid data cannot be received. B
TX_CTRL 29 Valid data cannot be received. B
TX_D3 30 Valid data cannot be received. B
TX_D2 31 Valid data cannot be received. B
TX_D1/TX_P 32 Valid data cannot be received. B
TX_D0/TX_M 33 Valid data cannot be received. B
VDDIO 34 The device not powering up is possible. B
LED_0/GPIO_0 35 LED_0/GPIO_0 is not operational. Master and slave strap can be sampled incorrectly. Device can be damaged. A
MDIO 36 No SMI communication is available. Device can be damaged. A
DAP GND Device can be damaged. A
Table 4-7 Pin FMA for Device Pins Short-Circuited to VDDA
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
MDC 1 No SMI communication. Device can be damaged. A
INT_N 2 Device can be damaged. A
RESET_N 3 Device can be damaged. A
XO 4 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown. A
XI 5 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown. B
LED_1/GPIO_1 6 Device can be damaged. A
VSLEEP 7 Device is functional. D
WAKE 8 Device does not go into sleep state. B
VDD1P0 9 Device can be damaged. A
INH 10 Inhibit is not operational. B
VDDA 11 Appropriate connection. D
TRD_P 12 Link and data transfer cannot occur. Device can be damaged. A
TRD_M 13 Link and data transfer cannot occur. Device can be damaged. A
STRAP_1 14 Device can be damaged. A
RX_CTRL 15 Device can be damaged. A
CLKOUT/GPIO_2 16 Device can be damaged. A
DNC 17 Device can be damaged. A
DNC 18 Device can be damaged. A
DNC 19 Device can be damaged. A
DNC 20 Device can be damaged. A
VDD1P0 21 Device can be damaged. A
VDDIO 22 Device can power up in the wrong state. B
RX_D3/RX_M 23 Device can be damaged. A
RX_D2/RX_P 24 Device can be damaged. A
RX_D1 25 Device can be damaged. A
RX_D0 26 Device can be damaged. A
RX_CLK 27 Device can be damaged. A
TX_CLK 28 Device can be damaged. A
TX_CTRL 29 Device can be damaged. A
TX_D3 30 Device can be damaged. A
TX_D2 31 Device can be damaged. A
TX_D1/TX_P 32 Device can be damaged. A
TX_D0/TX_M 33 Device can be damaged. A
VDDIO 34 Device can power up in the wrong state. B
LED_0/GPIO_0 35 Device can be damaged. A
MDIO 36 No SMI communication is available. Device can be damaged. A
DAP GND Device can be damaged. A
Table 4-8 Pin FMA for Device Pins Short-Circuited to VSLEEP
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
MDC 1 No SMI communication. Device can be damaged. A
INT_N 2 Device can be damaged. A
RESET_N 3 Device can be damaged. A
XO 4 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown. A
XI 5 Crystal resonator clock does not start-up. Device PLL is not operational. PHY state is unknown. B
LED_1/GPIO_1 6 Device can be damaged. A
VSLEEP 7 Appropriate connection. D
WAKE 8 Device does not go into sleep state. B
VDD1P0 9 Device can be damaged. A
INH 10 Inhibit is not operational. B
VDDA 11 Device is functional. D
TRD_P 12 Link and data transfer cannot occur. Device can be damaged. A
TRD_M 13 Link and data transfer cannot occur. Device can be damaged. A
STRAP_1 14 Device can be damaged. A
RX_CTRL 15 Device can be damaged. A
CLKOUT/GPIO_2 16 Device can be damaged. A
DNC 17 Device can be damaged. A
DNC 18 Device can be damaged. A
DNC 19 Device can be damaged. A
DNC 20 Device can be damaged. A
VDD1P0 21 Device can be damaged. A
VDDIO 22 Device can power up in the wrong state. B
RX_D3/RX_M 23 Device can be damaged. A
RX_D2/RX_P 24 Device can be damaged. A
RX_D1 25 Device can be damaged. A
RX_D0 26 Device can be damaged. A
RX_CLK 27 Device can be damaged. A
TX_CLK 28 Device can be damaged. A
TX_CTRL 29 Device can be damaged. A
TX_D3 30 Device can be damaged. A
TX_D2 31 Device can be damaged. A
TX_D1/TX_P 32 Device can be damaged. A
TX_D0/TX_M 33 Device can be damaged. A
VDDIO 34 Device can power up in the wrong state. B
LED_0/GPIO_0 35 Device can be damaged. A
MDIO 36 No SMI communication is available. Device can be damaged. A
DAP GND Device can be damaged. A