71M6545/71M6545H Metrology Processors DATA SHEET, introduces the overview, features, application scenarios, interfaces and pin definitions of the product
The 71M6545 and 71M6545H are metrology processors based on Teridian's 4th‑generation metering architecture. They integrate a 22‑bit delta‑sigma ADC, a customizable 32‑bit compute engine, and an 8051‑compatible MPU with up to 64 KB flash and 5 KB RAM. External hosts can access functions via SPI or the embedded MPU, and the devices include RTC, DIO, and UART.
The datasheet provides a full hardware description, analog front‑end details, digital compute engine functions, MPU core information, on‑chip resources, functional description, application guidance, firmware interface, and complete specifications for both variants.
| Accuracy | <0.1% over 2000:1 |
|---|---|
| Flash / RAM (71M6545) | 32 KB / 3 KB |
| Sleep‑mode supply current | 1 pA |
| Package | 64‑Pin Lead‑free LQFP |
| Digital I/O pins | Up to 29 |
The processor draws only 1 pA in sleep mode.
It provides better than 0.1 % accuracy over a 2000:1 range.