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

5 Pin Failure Mode Analysis (Pin FMA) DP83TC812R-Q1

This section provides a failure mode analysis (FMA) for the pins of the DP83TC812R-Q1. The failure modes covered in this document include the typical pin-by-pin failure scenarios:

Table 5-2 through Table 5-8 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 5-1.

Table 5-1 TI Classification of Failure Effects
Class Failure Effects
A Potential device damage that affects functionality.
B No device damage, but loss of functionality.
C No device damage, but performance degradation.
D No device damage, no impact to functionality or performance.

Figure 5-1 shows the DP83TC812R-Q1 pin diagram. For a detailed description of the device pins, see the Pin Configuration and Functions section in the DP83TC812R-Q1 data sheet.

Figure 5-1 Pin Diagram
Table 5-2 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 5-3 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 5-4 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 5-5 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 5-6 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 5-7 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 5-8 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