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STR720-EVAL bảng dữ liệu(PDF) 9 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  Evaluation Board for STR72xF
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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STR720-EVAL bảng dữ liệu(HTML) 9 Page - STMicroelectronics

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STR720-EVAL
2 Hardware
8/31
2.7
Power supplies
Power to the board is supplied using a lump in cord power supply providing 5 V to the board. All
other required voltages are provided on-board by voltage regulators or voltage convertors.
2.8
USB full speed interface
USB full speed interface device supported by a type B connector. The USB clock uses a
separate 48 MHz oscillator. See
Section 3.1: USB on page 14.
2.9
CAN interface
A general purpose, asynchronous serial I/O data port connected through a 9-pin D-type male
connector with microswitch selectable low speed fault tolerant transceiver (L9669) or low or
high speed selectable transceiver (L9616). See
Section 3.2: CAN bus connector on page 14.
The L9669 transceiver only works in normal mode, the wake-up functionality is not
implemented.
Caution:
The board schematic for the CAN interface detailed in
Section 4.10: STR720-Eval board - CAN
interface, is not a reference design and should not be copied. To design a CAN interface with
the STR720 please refer to the “STR720 Hardware Development Getting Started Guide
AN1907”.
2.10
RS232 serial interfaces
Two general purpose, asynchronous serial I/O data ports are connected through 9-pin D-type
male connectors. Refer to
Section 3.3: RS232 serial data connector on page 15.
RS232-A connects directly to UART1, transmit and receive only. RS232-B connects to UART2,
transmit and receive only.
RTS is shorted to CTS and DTR is shorted to DSR at the connector for both interfaces.
2.11
Analog input
The following analog inputs are provided, see the schematics
Section 4.1 on page 18:
ADC connector: CN4,
LM35 temperature sensor IC4 is connected to pin 4 of the ADC connector CN4 (pins 3 and
4 must be shorted to enable temperature sensing,)
variable resistor VR1 is connected to pin 2 of the ADC connector CN4 (pins 1 and 2 must
be shorted to enable the variable resistor.)


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