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VNF1248F 数据表(PDF) 43 Page - STMicroelectronics

部件名 VNF1248F
功能描述  High-side switch controller with intelligent fuse protection for 12 V, 24 V and 48 V automotive applications
PDF  79 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

VNF1248F 数据表(HTML) 43 Page - STMicroelectronics

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12
SPI functional description
12.1
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 14. SPI functional diagram
LSB
LSB
MSB
MSB
VNF1248F
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
VNF1248F
VNF1248F
VNF1248F
SPI functional description
DS14109 - Rev 7
page 43/79



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