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AN4444 Datasheet(PDF) 38 Page - STMicroelectronics

Part # AN4444
Description  ST7590 PRIME compliant power line networking SoC design guide
PDF  68 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4444 Datasheet(HTML) 38 Page - STMicroelectronics

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ST7590 reference design description
AN4444
38/68
DocID025925 Rev 2
8.2.1
Connections between STM32 microcontroller and ST7590
The STM32F103 microcontroller provides connections to the ST7590 device for both digital
and analog parts. These connections involve several pins and features of the ST7590
modem, as listed in Table 7.
Table 7. Connections between STM32F103RGT7 and ST7590 devices on EVALKITST7590-Q1
board
Connection
Connection
type
ST7590
pins
STM32F103
pins
Notes
Host interface
Digital
MISO0_RXD
PA2
See
Part 2 of Section 13: References on
page 63.
MOSI0_TXD
PA3
GPIO9
PA0/WKUP
Reset
Digital
RESETN
PC15
This direct connection allows the STM32
microcontroller driving the RESETN pin of the ST7590
device.
Clock
Digital
XIN
PA8
The connection must provide an
8 MHz clock signal to the ST7590 modem in
accordance with specifications in
Part 1 of
Section 13: References on page 63.
Power line
communication
activity
Digital
GPIO5
PC13
As the two lines give information about power line
communication activity of the ST7590, the
connections can be used as input data for the STM32.
GPIO3
PC14
Transmitted
power line
signal levels
Analog
PA_OUT
PB1
The connection allows the STM32 monitoring the
ST7590's PA_OUT voltage level. The connection is
realized through a suitable partition (between two high
values 1% tolerance resistors) to properly limit the
signal level within the STM32 input range.
CL voltage level
Analog
CL
PC3
The connection allows the STM32 to monitor the
ST7590's CL pin voltage level and to extract
information about the ST7590 output current during
power line transmission.



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