L9960 datasheet(31/95 Pages) STMICROELECTRONICS

31 / 95 page

DS11115 Rev 10

31/95

L9960, L9960T

Functional description

Figure 12. HWSC timing diagram

Stop conditions for HWSC test

The HWSC is stopped by one of the following conditions:



HWSC duration time “Thwsc_dur” has expired



in case of a reset condition (RESET active)

Once the HWSC duration time “Thwsc_dur” has expired the internal signal HWSC_done is

set to "1", independently of the HWSC result.

HWSC failed

In case the HWSC has failed or is not done, all outputs are disabled.

HWSC is not done if it was not triggered or if is not finished (“Thwsc_dur” not expired)

Result of HWSC/LBIST test

HWSC/LBIST test status (3 bits) is requested by SPI command "states request 1":

Note:

(-) available in the R8/R7/R6 positions in SPI answer frame 8a.

Table 31. HWSC/LBIST_status

Bit status (b2 b1 b0)

Description

Condition

0xx

HWSC/LBIST not done

Default value

100

HWSC/LBIST done - HWSC FAIL/LBIST FAIL

101

HWSC/LBIST done - HWSC running/LBIST PASS

110

HWSC/LBIST done - HWSC FAIL/LBIST PASS

111

HWSC/LBIST done - HWSC PASS/LBIST PASS

GAPGPS02318

HWSC done

& passed

HWSC

trigger

VDD_OV_th

O_vdd_ov_ref

i_vdd_ov

HWSC passed

HWSC not done

tHWSCrestarted

VDD_OV_HWSC

HWSC failed

VDD5

HWSC_DUR

HWSC_REF

Thwsc_fil

HWSC_DIS

HWSC_DONE

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