Polyphase metering SoC with 7 Sigma-Delta ADCs, LCD, real-time clock, AES, 256KB Flash, 32KB RAM

The TI MSP430F677x family of polyphase metering SoCs are powerful highly integrated solutions for revenue

meters that offer accuracy and low system cost with few external components. The

F677x family of devices uses the

low-power MSP430 CPU with a 32-bit multiplier to perform all energy calculations, metering

applications such as tariff rate management, and communications with AMR and AMI modules.

The F677x devices

feature TI’s 24-bit sigma-delta converter technology, which provides better than 0.1% accuracy.

Family members include up to 512KB of flash, 32KB of RAM, and an LCD controller with support for up

to 320 segments.

The ultra-low-power nature of the F677x devices means that the system power supply can be minimized to

reduce overall cost. Lowest standby power means that backup energy storage can be minimized and

critical data retained longer in case of a mains power failure.

The F677x family of

devices executes the TI energy measurement software library, which calculates all relevant energy

and power results. The energy measurement software library is available with the

F677x devices at no cost.

Industry standard development tools and hardware platforms are available to speed development of

meters that meet all of the ANSI and IEC standards globally.

For complete module descriptions, see the MSP430F5xx and MSP430F6xx Family User’s Guide.