Technical manual for the Hitrend HT501X energy‑metering SoC covering features, registers, power modes and hardware specifications.
The HT501X is a low‑power, high‑performance single‑phase energy‑metering SoC that integrates a 32‑bit ARM Cortex‑M0 core, 128 KB Flash, 8 KB SRAM, and multiple peripheral modules such as ADC, UART, LCD, and RTC. It is designed for single‑phase multifunction meters with anti‑theft capabilities and offers extensive on‑chip monitoring and power‑saving features.
This manual provides a complete description of the chip’s architecture, pin definitions, memory map, clock system, power management, debugging support, and detailed register tables for each module. It also includes electrical specifications, power consumption data, and guidelines for hardware design and firmware development. This manual is written in Chinese.
| Operating voltage range | 2.0 V – 5.5 V |
|---|---|
| Operating temperature range | -40 °C – 85 °C |
| Flash memory | 128 KB Flash + 512 bytes Information Block |
| SRAM | 8 KB |
| CPU core | 32‑bit ARM Cortex‑M0 |
| Hold mode minimum power consumption | 3.7 µA |
| Sleep mode minimum power consumption | 2.9 µA |
| Maximum UART ports | 6 ports (2 can be multiplexed with 7816) |
| LCD segment support | Up to 43 segments, 4/6/8 COM |
The Hold (standby) mode consumes a minimum of 3.7 µA.
The chip supports up to six UART interfaces, with two of them able to be multiplexed for hardware 7816 protocol.
The device operates from 2.0 V to 5.5 V.
It uses a 32‑bit ARM Cortex‑M0 core.