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L9963T Datasheet(PDF) 3 Page - STMicroelectronics

Part # L9963T
Description  Automotive general purpose SPI to isolated SPI transceiver
PDF  45 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9963T Datasheet(HTML) 3 Page - STMicroelectronics

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Table 1. Pin list description
Pin #
Type
Local/
Global
Active
Description
POWER
VDD
Power
Local
-
5V supply input for internal logic and isolated SPI
VIO
Power
Local
-
Digital Output Buffer Supply.
Connect either to 5 V or to 3.3 V supply.
GND
Ground
Local
-
Device Ground
SPI
SDO
Digital Output (Push-Pull)
Local
-
SPI Serial Data Output.
Needs external pull up/pull down resistor to define
inactive level.
SCK
Digital Input/
Output
(Push-Pull)
NSLAVE = 0 →
Digital Input
NSLAVE = 1 →
Digital Output
Local
-
SPI Serial Clock.
Internally pulled down with 100 kΩ
SDI
Digital Input
Local
-
SPI Serial Data Input.
Internally pulled down with a 100 kΩ resistor for safety
purposes.
NCS
Digital Input/
Output
(Push-Pull)
NSLAVE = 0 →
Digital Input
NSLAVE = 1 →
Digital Output
Local
-
SPI Chip Select.
Internally pulled up with a 100 kΩ resistor for safety
purposes.
BNE/CPOL
NSLAVE = 0 → BNE Digital
Output (Push-Pull)
Local
High
SDO Buffer Not Empty flag.
It is set high when at least one frame is in the RX buffer.
It is set low when RX buffer is empty. When L9963T is
configured as Slave, connect this pin to MCU GPIO for
interrupt/polling based communication.
NSLAVE = 1 → CPOL Digital
Input
Local
-
SPI Clock Polarity selection input.
Latched during Trimming & Config Latch.
Connect either to VDD (CPOL = 1) or to GND (CPOL =
0).
Internally pulled down (active).
Input filtered with RC filter having fCUT_DIG_IN cut
frequency.
NSLAVE
Digital Input
Local
-
SPI Slave/Master selection.
Latched during Trimming & Config Latch
Connect to GND to select Slave operation. Connect to
VDD to select Master operation.
Internally pulled down (active).
Input filtered with RC filter having fCUT_DIG_IN cut
frequency.
TXEN/CPHA
NSLAVE = 0 → TXEN Digital
Input
Local
High
Transmitter enable signal.
Set high to enable the TX activity. Pull down to disable
TX. Any data received on the SDI line while TXEN is low
will be discarded and not stored into TX buffer.
Internally pulled up (active).
Input filtered with RC filter having fCUT_DIG_IN cut
frequency.
L9963T
Pin description
DS13590 - Rev 4
page 3/45



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