L6474 datasheet(15/51 Pages) STMICROELECTRONICS

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L6474

Pin connection

Doc ID 022529 Rev 2

15/51

4.1

Pin list

Table 6.

Pin description

Name

Type

Function

VDD

Power

Logic outputs supply voltage (pull-up reference)

VREG

Power

Internal 3 V voltage regulator output and 3.3 V external logic

supply

OSCIN

Analog input

Oscillator pin 1. To connect an external oscillator or clock source.

If this pin is unused, it should be left floating.

OSCOUT

Analog output

Oscillator pin 2. To connect an external oscillator. When the

internal oscillator is used this pin can supply 2/4/8/16 MHz. If this

pin is unused, it should be left floating.

Output

Charge pump oscillator output

VBOOT

Supply voltage

Bootstrap voltage needed for driving the high side power DMOS of

both bridges (A and B)

ADCIN

Analog input

Internal analog to digital converter input

VSA

Power supply

Full bridge A power supply pin. It must be connected to VSB

VSB

Power supply

Full bridge B power supply pin. It must be connected to VSA

PGND

Ground

Power ground pin

OUT1A

Power output

Full bridge A output 1

OUT2A

Power output

Full bridge A output 2

OUT1B

Power output

Full bridge B output 1

OUT2B

Power output

Full bridge B output 2

AGND

Ground

Analog ground

DIR

Logical input

Direction input

DGND

Ground

Digital ground

SYNC

Open drain output

Synchronization signal.

SDO

Logic output

Data output pin for serial interface

SDI

Logic input

Data input pin for serial interface

Logic input

Serial interface clock

Logic input

Chip select input pin for serial interface

FLAG

Open drain output

Status flag pin. An internal open drain transistor can pull the pin to

GND when a programmed alarm condition occurs (step loss,

OCD, thermal pre-warning or shutdown, UVLO, wrong command,

non performable command)

STBY\RST

Logic input

Standby and reset pin. LOW logic level resets the logic and puts

the device into standby mode. If not used, should be connected to

VDD

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