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Control PWM using register directly?
2014 年 07 月 30 日
New Member
Forum Posts: 3
Member Since:
2014 年 07 月 17 日

Can I use the technique described in the article "Secrets of arduino PWM" using register to control PWM directly?
I need something like AVR ATMega328P datasheet for UNO as for 86duino educake.
But cannot find any datasheet on the web.

2014 年 07 月 30 日
Forum Posts: 135
Member Since:
2013 年 10 月 05 日

the PWM registers of 86Duino are different from ATmega328P because 86Duino's CPU is an x86 SoC called Vortex86EX (rather than AVR). The datasheet of Vortex86EX can be found in:; it includes most register definition of basic I/O devices such as GPIO and UART.

However, the PWM is a function of a comprehensive device called the Motion-Control Module (MCM); you can find a overview of MCM in the slide:
and the registers of MCM are defined in the separate "Vortex86EX MCM datasheet". For MCM datasheet, you may contact, and for source code to do low-level MCM access, you can refer to the mcm.h and mcm.cpp in 86Duino source code:

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