SFFS568B december 2022 – july 2023 DP83TC812R-Q1 , DP83TC812S-Q1 , DP83TC813R-Q1 , DP83TC813S-Q1

4 Pin Failure Mode Analysis (Pin FMA)

This section provides a failure mode analysis (FMA) for the pins of the DP83TC813x-Q1. The failure modes covered in this document include the typical pin-by-pin failure scenarios:

Pin short-circuited to ground (seeTable 4-2)

Pin open-circuited (see Table 4-3)
Pin short-circuited to an adjacent pin (see Table 4-4 )
Pin short-circuited to supply (see Table 4-5, Table 4-6, Table 4-7, and 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

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.

For a detailed description of the device pins, see the Pin Configuration and Functions section in the DP83TC813x-Q1 data sheet.

Figure 4-1 DP83TC813S-Q1 Pin Diagram

Figure 4-2 DP83TC813R-Q1 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
TX_CLK	1	Valid data cannot be received.	B
TX_EN/TX_CTRL	2	Valid data cannot be received.	B
TX_D3	3	Valid data cannot be received.	B
TX_D2	4	Valid data cannot be received.	B
TX_D1/TX_P	5	Valid data cannot be received.	B
TX_D0/TX_M	6	Valid data cannot be received.	B
VDDIO	7	Invalid IO supply.	B
MDIO	8	No SMI communication available.	B
MDC	9	No SMI communication available.	B
INT	10	No valid interrupt status.	B
RESET	11	Device in Reset state.	B
XO	12	Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known.	B
XI	13	Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known.	B
CLKOUT/LED_1	14	GPIO not operational.	B
VSLEEP	15	Device is disabled. VSLEEP supply short.	B
WAKE	16	Device can enter into sleep state.	B
INH	17	Inhibit is not operational.	B
VDDA	18	Invalid core supply.	B
TRD_P	19	Link/data transfer cannot occur.	A
TRD_M	20	Link/data transfer cannot occur.	A
RX_ER	21	Valid data cannot be sent to MAC.	B
RX_DV/CRS_DV/RX_CTRL	22	Valid data cannot be sent to MAC.	B
VDDMAC	23	Invalid VDDMAC supply.	B
RX_D3/RX_M	24	Valid data cannot be sent to MAC.	B
RX_D2/RX_P	25	Valid data cannot be sent to MAC.	B
RX_D1	26	Valid data cannot be sent to MAC.	B
RX_D0	27	Valid data cannot be sent to MAC	B
RX_CLK	28	Valid data cannot be sent to MAC.	B

Table 4-3 Pin FMA for Device Pins Open-Circuited

Pin Name	Pin No.	Description of Potential Failure Effect(s)	Failure Effect Class
TX_CLK	1	Valid data cannot be received.	B
TX_EN/TX_CTRL	2	Valid data cannot be received.	B
TX_D3	3	Valid data cannot be received.	B
TX_D2	4	Valid data cannot be received.	B
TX_D1/TX_P	5	Valid data cannot be received.	B
TX_D0/TX_M	6	Valid data cannot be received.	B
VDDIO	7	Device is disabled. IO supply open.	B
MDIO	8	No SMI communication available.	B
MDC	9	No SMI communication available.	B
INT	10	Interrupt will not be available.	B
RESET	11	Normal operation.	D
XO	12	Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known	B
XI	13	Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known.	B
CLKOUT/LED_1	14	No issue.	D
VSLEEP	15	Device is disabled. V_SLEEP supply open	B
WAKE	16	No issue.	D
INH	17	Inhibit is not operational.	B
VDDA	18	Device is disabled. Core supply open.	B
TRD_P	19	Link/data transfer cannot occur	B
TRD_M	20	Link/data transfer cannot occur.	B
RX_ER	21	Valid data cannot be sent to MAC.	B
RX_DV/CRS_DV/ RX_CTRL	22	Valid data cannot be sent to MAC.	B
VDDMAC	23	Device is disabled. MAC supply open.	B
RX_D3/RX_M	24	Valid data cannot be sent to MAC.	B
RX_D2/RX_P	25	Valid data cannot be sent to MAC.	B
RX_D1	26	Valid data cannot be sent to MAC.	B
RX_D0	27	Valid data cannot be sent to MAC.	B
RX_CLK	28	Valid data cannot be sent to MAC.	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
TX_CLK	1	TX_EN/TX_CTRL	Valid data cannot be received.	B
TX_EN/TX_CTRL	2	TX_D3	Valid data cannot be received.	B
TX_D3	3	TX_D2	Valid data cannot be received.	B
TX_D2	4	TX_D1/TX_P	Valid data cannot be received.	B
TX_D1/TX_P	5	TX_D0/TX_M	Valid data cannot be received.	B
TX_D0/TX_M	6	VDDIO	If VDDIO equals VDDMAC, valid data cannot be received. If VDDIO does not equal VDDMAC, device can be damaged.	B A
VDDIO	7	MDIO	No SMI communication available.	B
MDIO	8	MDC	No SMI communication available.	B
MDC	9	INT	No SMI communication available; no valid interrupt status.	B
INT	10	RESET	When device intending to give interrupt it enters reset. Also, when host resets the PHY, host will get ISR triggered.	B
RESET	11	XO	Device will keep getting reset.	B
XO	12	XI	Device in unknown state.	B
XI	13	CLKOUT/LED_1	Device in unknown state.	B
CLKOUT/LED_1	14	VSLEEP	Device may get damaged.	A
VSLEEP	15	WAKE	Wake functionality is lost.	B
WAKE	16	INH	Inhibit is not operational as per its definition.	B
INH	17	VDDA	Inhibit is not operational.	B
VDDA	18	TRD_P	Link/data transfer cannot occur.	A
TRD_P	19	TRD_M	Link/data transfer cannot occur.	B
TRD_M	20	RX_ER	Link/data transfer cannot occur.	B
RX_ER	21	RX_DV/CRS_DV/RX_CTRL	Communication to MAC may be lost. Valid data will trigger an error. PHY Address range restricted. MDC/MDIO communication could be lost.	B
RX_DV/CRS_DV/RX_CTRL	22	VDDMAC	Valid data cannot be sent to MAC.	B
VDDMAC	23	RX_D3/RX_M	Valid data cannot be sent to MAC.	B
RX_D3/RX_M	24	RX_D2/RX_P	Valid data cannot be sent to MAC.	B
RX_D2/RX_P	25	RX_D1	MAC interface selection may be corrupt. Valid data cannot be sent to MAC.	B
RX_D1	26	RX_D0	MAC interface selection may be corrupt. Valid data cannot be sent to MAC.	B
RX_D0	27	RX_CLK	MAC interface selection may be corrupt. Valid data cannot be sent to MAC.	B
RX_CLK	28	TX_CLK	Valid data cannot be exchanged with MAC.	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
TX_CLK	1	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
TX_EN/TX_CTRL	2	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
TX_D3	3	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
TX_D2	4	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
TX_D1/TX_P	5	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
TX_D0/TX_M	6	If VDDIO equals VDDMAC, valid data cannot be received. If VDDIO does not equal VDDMAC, device can be damaged.	B A
VDDIO	7	Appropriate connection.	D
MDIO	8	No SMI communication available.	B
MDC	9	No SMI communication available.	B
INT	10	No interrupt status.	B
RESET	11	Can never reset the device.	B
XO	12	PHY state not known.	B
XI	13	PHY state not known.	B
CLKOUT/LED_1	14	GPIO not operational.	B
VSLEEP	15	PHY may not power up.	B
WAKE	16	Device may not go into sleep state.	B
INH	17	Inhibit is not operational.	B
VDDA	18	Device may not power up.	B
TRD_P	19	Link/data transfer cannot occur. Device may get damaged.	A
TRD_M	20	Link/data transfer cannot occur. Device may get damaged.	A
RX_ER	21	PHY Address range restricted. MDC/MDIO communication could be lost. Device may get damaged when VDDIO and VDDMAC are different.	B A
RX_DV/CRS_DV/RX_CTRL	22	PHY Address range restricted. MDC/MDIO communication could be lost. Device may get damaged when VDDIO and VDDMAC are different.	B A
VDDMAC	23	No issue	D
RX_D3/RX_M	24	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
RX_D2/RX_P	25	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
RX_D1	26	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
RX_D0	27	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
RX_CLK	28	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	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
TX_CLK	1	Valid data cannot be received from MAC.	B
TX_EN/TX_CTRL	2	Valid data cannot be received from MAC.	B
TX_D3	3	Valid data cannot be received from MAC.	B
TX_D2	4	Valid data cannot be received from MAC.	B
TX_D1/TX_P	5	Valid data cannot be received from MAC	B
TX_D0/TX_M	6	Valid data cannot be received from MAC.	B
VDDIO	7	Device will be functional.	D
MDIO	8	No SMI communication available. Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
MDC	9	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
INT	10	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
RESET	11	Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
XO	12	PHY state not known.	B
XI	13	PHY state not known.	B
CLKOUT/LED_1	14	GPIO not operational. Device may get damaged when VDDIO and VDDMAC are of different voltage levels.	A
VSLEEP	15	PHY may not powerup.	B
WAKE	16	Device may not go into sleep state.	B
INH	17	Inhibit is not operational.	B
VDDA	18	Device may not power up.	B
TRD_P	19	Link/data transfer cannot occur. Device may get damaged.	A
TRD_M	20	Link/data transfer cannot occur. Device may get damaged.	A
RX_ER	21	PHY Address range restricted. MDC/MDIO communication could be lost. Invalid data triggered to the MAC.	B
RX_DV/CRS_DV/ RX_CTRL	22	PHY Address range restricted. MDC/MDIO communication could be lost. Invalid data triggered to the MAC.	B
VDDMAC	23	No issue.	D
RX_D3/RX_M	24	Valid data cannot be sent to MAC.	B
RX_D2/RX_P	25	Valid data cannot be sent to MAC.	B
RX_D1	26	Valid data cannot be sent to MAC.	B
RX_D0	27	Valid data cannot be sent to MAC.	B
RX_CLK	28	Valid data cannot be sent to MAC.	B

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
TX_CLK	1	Device may get damaged.	A
TX_EN/TX_CTRL	2	Device may get damaged.	A
TX_D3	3	Device may get damaged.	A
TX_D2	4	Device may get damaged.	A
TX_D1/TX_P	5	Device may get damaged.	A
TX_D0/TX_M	6	Device may get damaged.	A
VDDIO	7	Device will be functional.	D
MDIO	8	No SMI communication available. Device may get damaged.	A
MDC	9	Device may get damaged.	A
INT	10	Device may get damaged.	A
RESET	11	Device may get damaged.	A
XO	12	PHY state not known.	B
XI	13	PHY state not known.	B
CLKOUT/LED_1	14	Device may get damaged.	A
VSLEEP	15	Device will be functional.	D
WAKE	16	Device may not go into sleep state.	B
INH	17	Inhibit is not operational.	B
VDDA	18	Appropriate connection.	D
TRD_P	19	Link/data transfer cannot occur. Device may get damaged.	A
TRD_M	20	Link/data transfer cannot occur. Device may get damaged.	A
RX_ER	21	Device may get damaged.	A
RX_DV/CRS_DV/ RX_CTRL	22	Device may get damaged.	A
VDDMAC	23	Device will be functional.	D
RX_D3/RX_M	24	Device may get damaged.	A
RX_D2/RX_P	25	Device may get damaged.	A
RX_D1	26	Device may get damaged.	A
RX_D0	27	Device may get damaged.	A
RX_CLK	28	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
TX_CLK	1	Device may get damaged.	A
TX_EN/TX_CTRL	2	Device may get damaged.	A
TX_D3	3	Device may get damaged.	A
TX_D2	4	Device may get damaged.	A
TX_D1/TX_P	5	Device may get damaged.	A
TX_D0/TX_M	6	Device may get damaged.	A
VDDIO	7	Device will be functional.	D
MDIO	8	No SMI communication available. Device may get damaged.	A
MDC	9	Device may get damaged.	A
INT	10	Device may get damaged.	A
RESET	11	Device may get damaged.	A
XO	12	PHY state not known.	B
XI	13	PHY state not known.	B
CLKOUT/LED_1	14	Device may get damaged.	A
VSLEEP	15	Appropriate connection.	D
WAKE	16	Device may not go into sleep state.	B
INH	17	Inhibit is not operational.	B
VDDA	18	Device will be functional.	D
TRD_P	19	Link/data transfer cannot occur. Device may get damaged.	A
TRD_M	20	Link/data transfer cannot occur. Device may get damaged.	A
RX_ER	21	Device may get damaged.	A
RX_DV/CRS_DV/ RX_CTRL	22	Device may get damaged.	A
VDDMAC	23	Device will be functional.	D
RX_D3/RX_M	24	Device may get damaged.	A
RX_D2/RX_P	25	Device may get damaged.	A
RX_D1	26	Device may get damaged	A
RX_D0	27	Device may get damaged.	A
RX_CLK	28	Device may get damaged.	A