L6472 datasheet(51/69 Pages) STMICROELECTRONICS

51 / 69 page

L6472

Programming manual

Doc ID 022729 Rev 1

51/69

The OSC_SEL and EXT_CLK bits set the system clock source:

The SW_MODE bit sets the external switch to act as HardStop interrupt or not:

The OC_SD bit sets if an overcurrent event causes or not the bridges to turn off; the OCD

flag in the STATUS register is forced low anyway:

Table 24.

Oscillator management

EXT_CLK OSC_SEL[2..0]

Clock source

OSCIN

OSCOUT

Internal oscillator: 16 MHz

Unused

Internal oscillator: 16 MHz

Unused

Supplies a 2-MHz

clock

Internal oscillator: 16 MHz

Unused

Supplies a 4-MHz

clock

Internal oscillator: 16 MHz

Unused

Supplies an 8-MHz

clock

Internal oscillator: 16 MHz

Unused

Supplies a 16-MHz

clock

External crystal or resonator: 8 MHz

Crystal/resonator driving

Crystal/resonator

driving

External crystal or resonator:

16 MHz

Crystal/resonator driving

Crystal/resonator

driving

External crystal or resonator:

24 MHz

Crystal/resonator driving

Crystal/resonator

driving

External crystal or resonator:

32 MHz

Crystal/resonator driving

Crystal/resonator

driving

Ext clock source: 8 MHz

(Crystal/resonator driver disabled)

Clock source

Supplies inverted

OSCIN signal

Ext clock source: 16 MHz

(Crystal/resonator driver disabled)

Clock source

Supplies inverted

OSCIN signal

Ext clock source: 24 MHz

(Crystal/resonator driver disabled)

Clock source

Supplies inverted

OSCIN signal

Ext clock source: 32 MHz

(Crystal/resonator driver disabled)

Clock source

Supplies inverted

OSCIN signal

Table 25.

External switch hard stop interrupt mode

SW_MODE

Switch mode

HardStop interrupt

User disposal

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