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VNF1048F Folha de dados(PDF) 22 Page - STMicroelectronics

Nome de Peças VNF1048F
Descrição Electrónicos  High-side switch controller with intelligent fuse protection for 12 V, 24 V and 48 V automotive applications
PDF  49 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
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VNF1048F Folha de dados(HTML) 22 Page - STMicroelectronics

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6
SPI functional description
6.1
SPI Communication
The SPI communication is based on the “ST-SPI Specification”.
The device operates in Slave mode on a bus configuration through CSN, SDI, SDO and SCK signal lines, with 32
bits SPI frames.
A SPI Master device (Host Microcontroller) initiates the communication.
The SPI Master device must be configured in the following mode:
CPOL = 0, CPHA = 0
Input data are shifted into SDI, MSB first while output data are shifted out on SDO, MSB first.
Figure 9. SPI functional diagram
LSB
LSB
MSB
MSB
VNF1048F
Slave
µC
SPI Master
SDI
SDO
CSN
SCK
SDI
SDO
CSN
SCK
CS1
CS2
CSN2
CSN1
SCK
SDI
SDO
SCK
SDI
SDO
BUS master
SPI interface with
CPOL = 0
CPHA = 0
VNF1048F
VNF1048F
VNF1048F
SPI functional description
DS13084 - Rev 8
page 22/49



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