Migration from the 71M6511/71M6511H to the 71M6521

This application note explains what considerations apply when migrating from Teridian's 71M6511 to the 71M6521, a lower-cost alternative for single-phase energy-metering applications. The article also describes how designs that are based on the 71M6511 can host both the 71M6511 and the 71M6521. The article specifically discusses flash memory space, liquid-crystal display (LCD), serial synchronous interface (SSI) port, and pin-out considerations.

This appli-cation note explains what considerations apply when migrating from the 71M6511 to the 71M6521 and  how designs based on the 71M6511 can be adapted host both the 71M6511 and the 71M6521.

Differences in Pin-Out

Table 1 shows the 71M6511 and 71M6521 pin assignments in comparison. The usage of the pin in  question on the 71M6511 Demo Board is also explained in Table 1.