Key facts
- Brand
- Fairchild
- Model
- FCM8531
- Category
- Other Electronics
- Industry
- Electronics
- Documents
- 3
- Languages
- ZH
- Last added
- 2026-10-20
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Fairchild FCM8531 Motor Control Processor User Manual
The FCM8531 is a dual-core processor designed for motor control applications, combining an Advanced Motor Controller (AMC) and a MCS51-compatible MCU. The AMC core executes complex motor control algorithms such as sensorless Field Oriented Control (FOC), Space Vector Modulation (SVM), and PWM control, while the embedded MCU handles system control, user interfaces, and communication. This architecture reduces software burden and simplifies control system programming.
The document provides detailed hardware descriptions, including the mapping and specifications of Special Motor Function Registers (MSFR). It covers the AMC features like angle prediction, PLL, and Hall signal filtering, as well as the embedded MCU peripherals including timers, UART, SPI, I2C, and a 16-bit multiplier/divider unit. Additionally, it details the ADC and DAC specifications, protection mechanisms, power management modes, and development support tools. This manual is written in Chinese.
Fairchild FCM8531 specifications
| Recommended PWM frequency | 15 kHz – 20 kHz |
|---|---|
| Hall signal input configuration 0 | HA=P14, HB=P15, HC=P16 |
| Hall signal input configuration 1 | HA=P24, HB=P25, HC=P26 |
| Command code for Hall pin configuration | 0x80 |
Source: Fairchild FCM8531 AMC Hall Interface Application Guide
All Fairchild FCM8531 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the FCM8531 processor designed for?
The FCM8531 is a dual-core processor designed specifically for motor control applications, executing sensorless field-oriented control (FOC) algorithms.
How many channels does the built-in ADC have?
The device includes an 8-channel 10-bit analog-to-digital converter (ADC).
What PWM control modes are supported?
The PWM control modes are sine‑wave mode and square‑wave mode; the default is sine‑wave mode.
From: Fairchild FCM8531 AMC Hall Interface Application Guide
What is the command code to start a run operation?
The run command uses CMD_RUN with index 0x10.
From: Fairchild FCM8531 AMC Hall Interface Application Guide