L99ASC03 datasheet(29/73 Pages) STMICROELECTRONICS

Part #	L99ASC03

Description	Brushless / sensorless 3-phase motor pre-driver for automotive applications

PDF	73 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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29 / 73 page

DocID023504 Rev 7

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L99ASC03

Device description

Figure 13. Persistent watchdog failure (VBAT Standby Mode entered after 15 watchdog faults)

Figure 14. Persistent TSD2 failure (VBAT Standby Mode entered after 7 VDD turn-offs)

2.19

Serial peripheral interface (ST SPI standard)

A 16-bit ST SPI is used for bi-directional communication with an external microcontroller.

Through SPI it is possible to trigger the watchdog, control the operating modes, adjust some

device parameters and read out diagnostic information of several device modules.

During standby modes, the SPI is generally deactivated.

The SPI has to be driven in the following mode:

VDD

Short circuit at VDD turn-on

VDDFAIL = 1

Read & Clear VDDFAIL

Temperature

Tj>TSD2 for 7 times

(VDDR = 111)

TSD2 = 1

Read & Clear TSD2

Table 6. Forced VBAT standby mode

Source

Cause

Diagnosis

Clear error flag

VDD

Forced

VBAT Standby

tTSD

Counter

L99ASC03 Datasheet(PDF) 29 Page - STMicroelectronics