2 Block Diagram
Figure 1 shows the system block diagram of the EVM. The EVM is divided into the metrology portion that has the MSP430AFE and the application portion that has the MSP430F6638. The MSP430AFE is a slave metrology processor and the MSP430F6638 is the host/application processor. The two MSP430 devices communicate through digital isolators via serial peripheral interface (SPI) or universal asynchronous receiver/transmitter (UART).