Texas Instruments LaunchPad MSP430FR2476, Руководство пользователя

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10 SLAU802 – March 2019
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MSP430FR2476 LaunchPad™ Development Kit (LP ‑ MSP430FR2476)
The backchannel UART is the "MSP Application UART1" port. In this case, Figure 7 shows COM13, but
this port can vary from one host PC to the next. After you identify the correct COM port, configure it in
your host application according to its documentation. You can then open the port and begin
communication to it from the host.
On the target MSP430FR2476 MCU, the backchannel is connected to the eUSCI_A0 module. The eZ-FET
has a configurable baud rate, and it is important to configure the PC application with the same baud rate
as the eUSCI_A0.
2.2.5 Special Features
2.2.5.1 TMP235 Temperature Sensor
The MSP430FR2476 MCU LaunchPad development kit features a TMP235A2 temperature sensor that is
accurate to ±0.5°C (typical) from –40°C to +150°C. The analog output of the TMP235 is connected to
analog input A1 (P1.1) on the MSP430FR2476 through a capacitor (C7) and a pair of resistors (R12 and
R13). The capacitor and resistors can be replaced if a custom RC circuit is needed. For applications that
use the temperature sensor and a connected BoosterPack plug-in module, determine if there are any pin
conflicts. The 3.3-V power rail can be disconnected from the TMP235 device by removing the shunt
jumper at J9. This is useful in low-power applications that do not use the temperature sensor.
2.2.5.2 CR2032 Coin Cell Battery
On the back of the LP-MSP430FR2476 board is a holder for a CR2032 coin cell battery (battery not
included). A CR2032 battery can be added to demonstrate battery-powered applications. See
Section 2.3.2 for additional details on how to power the LaunchPad development kit with the coin cell
battery.
2.3 Power
The board accommodates various powering methods, including through the onboard eZ-FET, using the
CR2032 battery, or using external or BoosterPack plug-in module power (see
Figure 8 ).
Figure 8. LP-MSP430FR2476 Power Block Diagram
2.3.1 eZ-FET USB Power
The most common power-supply scenario is from USB through the eZ-FET debugger. This provides 5-V
power from the USB and also regulates this power rail to 3.3 V for eZ-FET operation and 3.3 V to the
target side of the LaunchPad development kit. Power from the eZ-FET is controlled by jumper J101. For
3.3 V, make sure that a jumper is connected across the J101 3V3 terminal.