STPM098C datasheet(23/110 Pages) STMICROELECTRONICS

23 / 110 page

Note:

During ABIST, the functionality of the involved monitoring unit is suspended for the entire duration of the

procedure. It is of the utmost importance that BIST mode retriggering is performed with loop controller disabled

(VR_ENn = 0).

3.4

Fault handling management (FHM)

The fault set is divided into two main categories based on the required corrective action:

•

LTC (latched fault): this subset includes highly dangerous faults for the IC or the application, requiring quick

corrective actions to avoid harming;

•

IGN (ignore): this subset includes all those faults against which the application and the device are tolerant

and the corrective actions can be waived.

STPM098C allows a certain degree of fault management customization; a subset of available faults can be

configured by setting the proper FHC registers.

Table 18. Fault reaction summary

Fault flag

Source diagnosis

Self-

check

Failure reaction

Fault description

INT_RST = 1

VREF1 monitor

YES

RESET (LTC)

Undervoltage on VREF1

INT_RST = 1

VREF1 monitor

YES

RESET (LTC)

Overvoltage on VREF1

INT_RST = 1

VREF1 monitor

YES

RESET (LTC)

Overtemperature on VREF1

VREF2_UV = 1

VREF2 monitor

YES

SAFE_HIZ (LTC)

Undervoltage on VREF2

VREF2_OV = 1

VREF2 monitor

YES

SAFE_HIZ (LTC)

Overvoltage on VREF2

VREF2_OT = 1

VREF2 monitor

YES

RESET (LTC)

Overtemperature on VREF2

VCC_UV = 1

VCC monitor

YES

SAFE_HIZ (LTC)

Undervoltage on VCC

VCC_OV = 1

VCC monitor

YES

SAFE_HIZ (LTC)

Overvoltage on VCC

INT_RST = 1

ICM

YES

RESET and

SAFE_HIZ (LTC)

Main clock stuck violation

CLK_MISMATCH = 1

CLK1_TIME_OUT = 1

CLK2_TIME_OUT = 1

ICM

YES

RESET and

SAFE_HIZ (LTC)

Oscillators mismatch or clock stuck

violation

AGND_LOSS = 1

DGND_LOSS = 1

GLM

YES

Flag only (IGN)

Loss of power or signal grounds

OTM_SD = 1

OTM

Configurable

Thermal shutdown

OTM_WR = 1

OTM

Flag only (ignore)

Thermal warning

VIN_UV = 1

VIN monitor

Configurable

Input overvoltage

IIN_OC = 1

IIN monitor

Configurable

Input overcurrent

PIN_OP = 1

PIN monitor

Configurable

Input overpower

VOUTn_UV = 1

VOUT monitor

Configurable

Undervoltage on VSENn [n = 1, 2]

VOUTn_OV = 1

VOUT monitor

Configurable

Overvoltage on VSENn [n = 1, 2]

IOUTn_OC_FAST = 1(1)

IOUT monitor

YES

Configurable

Phase FAST overcurrent [n = 1, 2, 3,

4, 5, 6, 7, 8]

IOUTn_OC_SLOW = 1(1)

IOUT monitor

YES

Configurable

Phase SLOW overcurrent [n = 1, 2,

3, 4, 5, 6, 7, 8]

IOUTn_OC_SUM = 1

IOUT monitor

Configurable

Current sum overcurrent [n = 1, 2]

TSENn_OT_SD = 1

TSEN monitor

Configurable

Overtemperature shutdown on

TSENn [n = 1, 2]

TSENn_OT_WR = 1

TSEN monitor

Configurable(2)

Overtemperature warning on TSENn

[n = 1, 2]

STPM098C

Functional description

DS14440 - Rev 1

page 23/110

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