SLAA517F May   2012  – August 2021 MSP430F6720A , MSP430F6720A , MSP430F6721A , MSP430F6721A , MSP430F6723A , MSP430F6723A , MSP430F6724A , MSP430F6724A , MSP430F6725A , MSP430F6725A , MSP430F6726A , MSP430F6726A , MSP430F6730A , MSP430F6730A , MSP430F6731A , MSP430F6731A , MSP430F6733A , MSP430F6733A , MSP430F6734A , MSP430F6734A , MSP430F6735A , MSP430F6735A , MSP430F6736 , MSP430F6736 , MSP430F6736A , MSP430F6736A

 

  1.   Trademarks
  2. 1Introduction
  3. 2System Diagrams
  4. 3Hardware Implementation
    1. 3.1 Power Supply
      1. 3.1.1 Resistor Capacitor (RC) Power Supply
    2. 3.2 Analog Inputs
      1. 3.2.1 Voltage Inputs
      2. 3.2.2 Current Inputs
  5. 4Software Implementation
    1. 4.1 Peripherals Setup
      1. 4.1.1 SD24 Setup
    2. 4.2 Foreground Process
      1. 4.2.1 Formulas
        1. 4.2.1.1 Voltage and Current
        2. 4.2.1.2 Power and Energy
    3. 4.3 Background Process
      1. 4.3.1 Voltage and Current Signals
      2. 4.3.2 Phase Compensation
      3. 4.3.3 Frequency Measurement and Cycle Tracking
      4. 4.3.4 LED Pulse Generation
  6. 5Energy Meter Demo
    1. 5.1 EVM Overview
      1. 5.1.1 Connections to the Test Setup for AC Voltages
      2. 5.1.2 Power Supply Options and Jumper Settings
    2. 5.2 Loading the Example Code
      1. 5.2.1 Opening the Project
  7. 6Results and Calibration
    1. 6.1 Viewing Results
    2. 6.2 Calibrating the Meter
      1. 6.2.1 Gain Correction
      2. 6.2.2 Phase Correction
      3. 6.2.3 Metrology Results
  8. 7References
  9. 8Schematics
  10. 9Revision History

5.1.2 Power Supply Options and Jumper Settings

The entire board and the UART communication is powered by a single dc voltage rail (DVCC). DVCC can be derived through JTAG, external power, or the ac mains through the capacitive power supply. Various jumper headers and jumper settings are present to add to the flexibility to the board. Headers JP1 to JP15 constitute the entire headers on the EVM shown above. Some of these headers require that jumpers be placed appropriately for blocks to function correctly. Table 5-1 indicates the functionality of each jumper on the board and the associated functionality.

Table 5-1 Header Names and Jumper Settings on the MSP430F6736(A) EVM
Header Name Main Functionality Valid Use Case Comments
JP1 JTAG power selection Jumper placed during JTAG programming Jumper on "INTERNAL" selects JTAG voltage from the attached USB FET. Jumper on "EXTERNAL" selects JTAG voltage from an external source.
JP4 DVCC Power Selection Jumper placed during operation Jumper on "VCC_PL" selects voltage from the cap drop power supply on board, and jumper on "VCC_EXT" selects an external input from JP3.
JP3 External power input Not a jumper header When using an external source for DVCC, attach VCC and GND here.
JP2 Current Sensor Reference Connects the -ve input of the current sensor sigma delta to AGND Place a jumper if Current transformers are used. Do not place jumper if shunt is used. Needs to be placed on the EVM if used as provided
AUX1 AUXVCC1 selection Connects AUXVCC1 to GND and input of external supply of AUXVCC1. Jumper must be present if AUXVCC1 is not used. When removed, it can be used to supply an external voltage to AUXVCC1.
AUX2 AUXVCC2 selection Connects AUXVCC2 to GND and input of external supply of AUXVCC2. Jumper must be present if AUXVCC2 is not used. When removed, it can be used to supply an external voltage to AUXVCC2.
AUX3 AUXVCC3 selection Connects AUXVCC3 to DVCC and input of external supply of AUXVCC3. Jumper can be placed if AUXVCC3 needs to be used; when removed it can be used to supply an external voltage to AUXVCC3.
JP7 Isolated active energy pulses Not a jumper header Isolated output to probe the active energy output pulses using external equipment.
JP8 Isolated reactive energy pulses Not a jumper header Isolated output to probe the reactive energy output pulses using external equipment.
SV1 DVCC Power Tap Not a jumper header Used to measure DVCC or connect power to an external module.
SV2 DGND Power Tap Not a jumper header Used to measure DGND or connect power to an external module.
RF1 + RF2 TI EMK Headers Not a jumper header Used to connect a standard TI Wireless Evaluation Module Kit (EMK) such as the CC2530 or CC3000
ACT Non-isolated active energy pulses + GND Not a jumper header Not isolated from ac voltage. Do not connect external equipment if external isolation is not present. The left pin is the signal, and the right pin is GND.
REACT Non-isolated reactive energy pulses + GND Not a jumper header Not isolated from ac voltage. Do not connect external equipment if external isolation is not present. The left pin is the signal, and the right pin is GND.