SFFS193A July   2022  – November 2022 DP83TC812R-Q1 , DP83TC812S-Q1

 

  1.   Trademarks
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA) DP83TC812S-Q1
  6. 5Pin Failure Mode Analysis (Pin FMA) DP83TC812R-Q1
  7. 6Revision History

4 Pin Failure Mode Analysis (Pin FMA) DP83TC812S-Q1

This section provides a failure mode analysis (FMA) for the pins of the DP83TC812S-Q1. The failure modes covered in this document include the typical pin-by-pin failure scenarios:

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 DP83TC812S-Q1 pin diagram. For a detailed description of the device pins, see the Pin Configuration and Functions section in the DP83TC812S-Q1 data sheet.

Figure 4-1 Pin Diagram
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
Pin Name Pin No. Description of Potential Failure Effect(s) Failure Effect Class
MDC 1 No SMI communication available B
INT 2 No valid interrupt status B
RESETN 3 Device in Reset state B
XO 4 Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known B
XI 5 Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known B
LED_1 6 GPIO_1 not operational B
VSLEEP 7 Device is disabled. Vsleep supply short B
WAKE 8 Device can enter into sleep state B
NC 9 No issue D
INH 10 Inhibit is not operational. B
VDDA 11 Device is disabled. Core supply short B
TRD_P 12 Link/data transfer cannot occur A
TRD_M 13 Link/data transfer cannot occur A
RX_ER 14 Valid data cannot be sent to MAC B
RX_CTRL 15 Valid data cannot be sent to MAC B
CLKOUT 16 GPIO_2 not operational. Daisy chaining won’t work if CLKOUT used to give clock to another PHY B
GND_ESC 17 No issue D
GND_ESC 18 No issue D
DNC 19 No issue D
DNC 20 No issue D
NC 21 No issue D
VDDMAC 22 MAC supply short B
RX_D3 23 Valid data cannot be sent to MAC B
RX_D2 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 32 Valid data cannot be received B
TX_D0 33 Valid data cannot be received B
VDDIO 34 IO supply short B
LED_0 35 GPIO_0 not operational, link-up can still happen with register write for master B
MDIO 36 No SMI communication available B
DAP GND Appropriate connection D
Table 4-3 Pin FMA for Device Pins Open-Circuited
Pin Name Pin No. Description of Potential Failure Effect(s) Failure Effect Class
MDC 1 No SMI communication available B
INT 2 Interrupt will not be available B
RESETN 3 Normal Operation D
XO 4 Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known B
XI 5 Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known B
LED_1 6 Normal Operation D
VSLEEP 7 Device is disabled. Vsleep supply open B
WAKE 8 No issue D
NC 9 No issue D
INH 10 Inhibit is not operational. B
VDDA 11 Device is disabled. Core supply open B
TRD_P 12 Link/data transfer cannot occur B
TRD_M 13 Link/data transfer cannot occur B
RX_ER 14 Valid data cannot be sent to MAC B
RX_CTRL 15 Valid data cannot be sent to MAC B
CLKOUT 16 No issue D
GND_ESC 17 No issue D
GND_ESC 18 No issue D
DNC 19 No issue D
DNC 20 No issue D
NC 21 No issue D
VDDMAC 22 Device is disabled. MAC supply open B
RX_D3 23 Valid data cannot be sent to MAC B
RX_D2 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 32 Valid data cannot be received B
TX_D0 33 Valid data cannot be received B
VDDIO 34 Device is disabled. IO supply open B
LED_0 35 Link-up can still happen with register write for master B
MDIO 36 No SMI communication available B
DAP GND Ground 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 Effect(s) Failure Effect Class
MDC 1 INT No SMI communication available, No valid interrupt status B
INT 2 RESETN When device intending to give interrupt it enters reset. Also, when host resets the PHY, host will get ISR triggered B
RESETN 3 XO Device will keep getting reset B
XO 4 XI Device in unknown state B
XI 5 LED_1 Device in unknown state B
LED_1 6 VSLEEP Device may get damaged. A
VSLEEP 7 WAKE Wake functionality is lost B
WAKE 8 NC No issue D
NC 9 INH No issue D
INH 10 VDDA Inhibit is not operational B
VDDA 11 TRD_P Link/data transfer cannot occur A
TRD_P 12 TRD_M Link/data transfer cannot occur B
TRD_M 13 RX_ER Link/data transfer cannot occur B
RX_ER 14 RX_CTRL Communication to MAC may be lost. Valid data will trigger an error B
RX_CTRL 15 CLKOUT Spurious data transfer. CLKOUT may have glitches B
CLKOUT 16 GND_ESC No issue D
GND_ESC 17 GND_ESC No issue D
GND_ESC 18 DNC No issue D
DNC 19 DNC No issue D
DNC 20 NC No issue D
NC 21 VDDMAC No issue D
VDDMAC 22 RX_D3 Valid data cannot be sent to MAC B
RX_D3 23 RX_D2 Valid data cannot be sent to MAC B
RX_D2 24 RX_D1 MAC interface selection may be corrupt. Valid data cannot be sent to MAC B
RX_D1 25 RX_D0 MAC interface selection may be corrupt. Valid data cannot be sent to MAC B
RX_D0 26 RX_CLK MAC interface selection may 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 Valid data cannot be received B
TX_D1 32 TX_D0 Valid data cannot be received B
TX_D0 33 VDDIO Valid data cannot be received B
VDDIO 34 LED_0 Valid data cannot be received. Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
LED_0 35 MDIO Link-up still possible through register write. Spurious LED glow/blink B
MDIO 36 MDC No SMI communication available. B
Table 4-5 Pin FMA for Device Pins Short-Circuited to VDDIO
Pin Name Pin No. Description of Potential Failure Effect(s) Failure Effect Class
MDC 1 No SMI communication available B
INT 2 No interrupt status B
RESETN 3 Can never reset the device B
XO 4 PHY state not known B
XI 5 PHY state not known B
LED_1 6 GPIO not operational, Device will enter standby mode. Need register write to start link-up B
VSLEEP 7 PHY may not powerup B
WAKE 8 Device may not go into sleep state B
NC 9 No issue D
INH 10 Inhibit is not operational B
VDDA 11 Device may not power up B
TRD_P 12 Link/data transfer cannot occur. Device may get damaged A
TRD_M 13 Link/data transfer cannot occur. Device may get damaged A
RX_ER 14 PHY Address range restricted. MDC/MDIO communication could be lost. Device may get damaged when VDDIO and VDDMAC are different B
RX_CTRL 15 PHY Address range restricted. MDC/MDIO communication could be lost. Device may get damaged when VDDIO and VDDMAC are different B
CLKOUT 16 GPIO not operational. Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
GND_ESC 17 No issue D
GND_ESC 18 No issue D
DNC 19 Device may get damaged A
DNC 20 Device may get damaged A
NC 21 No issue D
VDDMAC 22 No issue D
RX_D3 23 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
RX_D2 24 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
RX_D1 25 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
RX_D0 26 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
RX_CLK 27 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
TX_CLK 28 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
TX_CTRL 29 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
TX_D3 30 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
TX_D2 31 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
TX_D1 32 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
TX_D0 33 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
VDDIO 34 Appropriate connection D
LED_0 35 GPIO_0 not operational. Device will be always in master mode. May need register write for linkup B
MDIO 36 No SMI communication available B
DAP GND Device may get damaged A
Table 4-6 Pin FMA for Device Pins Short-Circuited to VDDMAC
Pin Name Pin No. Description of Potential Failure Effect(s) Failure Effect Class
MDC 1 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
INT 2 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
RESETN 3 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
XO 4 PHY state not known B
XI 5 PHY state not known B
LED_1 6 Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
VSLEEP 7 PHY may not powerup B
WAKE 8 Device may not go into sleep state B
NC 9 No issue D
INH 10 Inhibit is not operational B
VDDA 11 Device may not power up B
TRD_P 12 Link/data transfer cannot occur. Device may get damaged A
TRD_M 13 Link/data transfer cannot occur. Device may get damaged A
RX_ER 14 PHY Address range restricted. MDC/MDIO communication could be lost. Invalid data triggered to the MAC B
RX_CTRL 15 PHY Address range restricted. MDC/MDIO communication could be lost. Invalid data triggered to the MAC B
CLKOUT 16 GPIO not operational. B
GND_ESC 17 No issue D
GND_ESC 18 No issue D
DNC 19 Device may get damaged A
DNC 20 Device may get damaged A
NC 21 No issue D
VDDMAC 22 No issue D
RX_D3 23 Valid data cannot be sent to MAC B
RX_D2 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 from MAC B
TX_CTRL 29 Valid data cannot be received from MAC B
TX_D3 30 Valid data cannot be received from MAC B
TX_D2 31 Valid data cannot be received from MAC B
TX_D1 32 Valid data cannot be received from MAC B
TX_D0 33 Valid data cannot be received from MAC B
VDDIO 34 Device will be functional D
LED_0 35

GPIO_0 not operational. Device will be always in master mode. May need register write for linkup.

Device may get damaged when VDDIO and VDDMAC are of different voltage levels

 A
MDIO 36 No SMI communication available. Device may get damaged when VDDIO and VDDMAC are of different voltage levels A
DAP GND Device may get damaged A
Table 4-7 Pin FMA for Device Pins Short-Circuited to VDDA
Pin Name Pin No. Description of Potential Failure Effect(s) Failure Effect Class
MDC 1 Device may get damaged A
INT 2 Device may get damaged A
RESETN 3 Device may get damaged A
XO 4 PHY state not known B
XI 5 PHY state not known B
LED_1 6 Device may get damaged A
VSLEEP 7 Device will be functional. D
WAKE 8 Device may not go into sleep state B
NC 9 No issue D
INH 10 Inhibit is not operational B
VDDA 11 Appropriate connection D
TRD_P 12 Link/data transfer cannot occur. Device may get damaged A
TRD_M 13 Link/data transfer cannot occur. Device may get damaged A
RX_ER 14 Device may get damaged A
RX_CTRL 15 Device may get damaged A
CLKOUT 16 Device may get damaged A
GND_ESC 17 No issue D
GND_ESC 18 No issue D
DNC 19 Device may get damaged A
DNC 20 Device may get damaged A
NC 21 No issue D
VDDMAC 22 Device will be functional D
RX_D3 23 Device may get damaged A
RX_D2 24 Device may get damaged A
RX_D1 25 Device may get damaged A
RX_D0 26 Device may get damaged A
RX_CLK 27 Device may get damaged A
TX_CLK 28 Device may get damaged A
TX_CTRL 29 Device may get damaged A
TX_D3 30 Device may get damaged A
TX_D2 31 Device may get damaged A
TX_D1 32 Device may get damaged A
TX_D0 33 Device may get damaged A
VDDIO 34 Device will be functional D
LED_0 35 Device may get damaged A
MDIO 36 No SMI communication available. Device may get damaged A
DAP GND Device may get damaged A
Table 4-8 Pin FMA for Device Pins Short-Circuited to VSLEEP
Pin Name Pin No. Description of Potential Failure Effect(s) Failure Effect Class
MDC 1 Device may get damaged A
INT 2 Device may get damaged A
RESETN 3 Device may get damaged A
XO 4 PHY state not known B
XI 5 PHY state not known B
LED_1 6 Device may get damaged A
VSLEEP 7 Appropriate connection. D
WAKE 8 Device may not go into sleep state B
NC 9 No issue D
INH 10 Inhibit is not operational B
VDDA 11 Device will be functional D
TRD_P 12 Link/data transfer cannot occur. Device may get damaged A
TRD_M 13 Link/data transfer cannot occur. Device may get damaged A
RX_ER 14 Device may get damaged A
RX_CTRL 15 Device may get damaged A
CLKOUT 16 Device may get damaged A
GND_ESC 17 No issue D
GND_ESC 18 No issue D
DNC 19 Device may get damaged A
DNC 20 Device may get damaged A
NC 21 No issue D
VDDMAC 22 Device will be functional D
RX_D3 23 Device may get damaged A
RX_D2 24 Device may get damaged A
RX_D1 25 Device may get damaged A
RX_D0 26 Device may get damaged A
RX_CLK 27 Device may get damaged A
TX_CLK 28 Device may get damaged A
TX_CTRL 29 Device may get damaged A
TX_D3 30 Device may get damaged A
TX_D2 31 Device may get damaged A
TX_D1 32 Device may get damaged A
TX_D0 33 Device may get damaged A
VDDIO 34 Device will be functional D
LED_0 35 Device may get damaged A
MDIO 36 No SMI communication available. Device may get damaged A
DAP GND Device may get damaged A