L9960T datasheet(24/95 Pages) STMICROELECTRONICS

24 / 95 page

Functional description

L9960, L9960T

24/95

DS11115 Rev 10

Note:

(-) available in position R2 of the SPI answer frame 8a.

Note:

(-) available in position R1 of the SPI answer frame 12b.

In case of VDD5 over-voltage condition, the bridge is kept in disable until the over-voltage

condition is removed (hysteresis as well as TVDD5_ov filtering implemented).

Figure 10. VDD5 over voltage monitoring

This information is filtered, and reported in NGFAIL (Global Failure Bit NGFAIL definition on

page 64).

A counter is available to inform about the overvoltage event length (guaranteed by scan).

The counter starts as soon as VDD5_OV event occurs.

The counter stops for the following conditions:



when its max value was reached,



when the VDD5_OV condition is removed.

The VDD5_OV length information is readable in a latched 3 bits word called VDD5_OV_L.

These 3 bits define the time range of the current counter value, according to the following

table:

Table 19. VDD_OV_REG

Bit status

Description

Condition

Latched Vdd < Vdd_ov_th longer than Tvdd_ov

Default Value

Latched Vdd > Vdd_ov_th longer than Tvdd_ov

Table 20. VDD_OV

Bit status

Description

Condition

Vdd < Vdd_ov_th longer than Tvdd_ov

Default value

Vdd > Vdd_ov_th longer than Tvdd_ov

GAPGPS02316

Vdd _ov_th

Vdd

ON-STATE

DISABLE

BRIDGE

STATE

NDIS

T < Tvdd _ov

VDD_OV

Tvdd _ov

Vdd _ov_hys

ON-STATE

T < Tvdd _ov

T > Thold _ndis

Filter 2.6ms

OV_DIS

VDD_OV

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