L9963T-TR datasheet(15/45 Pages) STMICROELECTRONICS

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L9963T

state

L9963T

configuration

TXAMP sampling

Note

Normal

state

Master (NSLAVE =

The TXAMP setting is simply resynchronized (TTXAMP_SETUP

and TTXAMP_HOLD requirements still apply) and deglitched

(TTXAMP_DEGLITCH filter still present), but it is not latched upon NCS

assertion. The new amplitude setting is applied to the TX interface

as soon as the transmission of the SPI frame over the isolated SPI

interface begins.

In case several SPI

frames are being

pushed into the TX

queue, the setting

applied depends

on the last one

latched (no pipelining

supported).

Stand-by

state

Slave/Master

(NSLAVE = X)

The new TXAMP setting is latched during the wakeup sequence.

Hence, the TXAMP pin shall be stable TTXAMP_SETUP before the

DIS high → low transition is applied and shall not change during

TWAKEUP.

Reset

state

Slave/Master

(NSLAVE = X)

The initial TXAMP setting is latched during the first power up

sequence. Hence, the TXAMP pin shall be stable before VDD is

applied and shall not change duringTFIRST_POWERUP.

It is recommended to apply the same TXAMP setting to all the devices communicating on the bus, in order to

keep a constant SNR in every communication phase.

In order to meet standby consumption requirements, MCU must release the open drain output connected to

TXAMP while L9963T is in Stand-by state.

Figure 9. TXAMP pin structure

TXAMP

IN_PU

VIO

TO OPEN DRAIN OUTPUT

V3V3_STBY

TXAMP

3.2.1.8

Electrical parameters - Digital I/O

3.2.1.8.1

Digital input

All parameters are tested and guaranteed in the following conditions, unless otherwise specified: 4.5 V ≤ VVDD ≤

5.5 V ; -40 °C < Tj < 125 °C

Table 11. Digital input electrical characteristics

Symbol

Parameters

Test conditions

Min

Typ Max

Unit

VIN_L

Logic input low voltage.

0.8

VIN_H

Logic input high voltage.

1.8

L9963T

Pin configuration

DS13590 - Rev 4

page 15/45

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