L9963T datasheet(4/45 Pages) STMICROELECTRONICS

4 / 45 page

Pin #

Type

Local/

Global

Active

Description

TXEN/CPHA

NSLAVE = 1 → CPHA Digital

Input

Local

SPI Clock Phase selection input.

Latched during Trimming & Config Latch.

Connect either to VDD (CPHA = 1) or to GND (CPHA =

0).

Internally pulled up (active).

Input filtered with RC filter having fCUT_DIG_IN cut

frequency.

SPICLKFREQ

Analog Input

Local

SPI Master Clock selection.

Latched during Trimming & Config Latch.

Leave open to set minimum frequency. Connect a pull

down resistor to set a higher frequency.

Input filtered with RC filter having fCUT_DIG_IN cut

frequency.

ISOLATED SPI

ISOP

Analog Input/Output

Global

Isolated SPI Positive terminal

ISOM

Analog Input/Output

Global

Isolated SPI Negative terminal

TXAMP

Digital Input

Local

Isolated SPI TX amplitude selection.

Set low to select low amplitude/low threshold. Set high to

select high amplitude/high threshold.

Internally pulled up with a 100 kΩ resistor.

ISOFREQ

Digital Input

Local

Isolated SPI operating frequency selection.

Pull high to set high frequency.

Pull down to set low frequency.

Internally pulled down (active).

DISABLE

DIS

Digital Input/Output (Open

Drain)

Local

High

Transceiver Disable Input.

Pull it up with external resistor connected to VIO. When

DIS is high, L9963 enters in low power mode. When DIS

is low, L9963T is enabled and working in Normal mode.

It can be either pulled-down by the MCU to enable the

unit, or pulled down internally when a wakeup condition

occurs, in order to interrupt the MCU.

Pin is internally pulled up with 100 kΩ resistor.

Input filtered with RC filter having fCUT_DIG_IN cut

frequency.

L9963T

Pin description

DS13590 - Rev 4

page 4/45

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