• ADuC831: FAQ

    FAQ

  • ADuC831: INTVAL

    Q 

    Does the 8bit interval counter reset to zero automatically when the comparator
    generates an interrupt? If not how can I reset this counter?
    If I'd like to load an new value into the register intval, do I need to clear
    TCEN first?

     

    A 

    The INTVAL…

  • What's the maximum sampling rate of ADuC831?

    Q 

    1. What's the maximum sampling rate of ADuC831? The uC019 specifies 200KHz;

    2. In DMA mode, the enclosed code example of external triggered conversions
    configured the CK1 CK0 and AQ1 AQ0 of ADCCON1, why? For this mode's sampling
    rate…

  • How do I migrate from ADuC812 to ADuC831 or ADu832?

    Q 

    What steps do I need to take to migrate from ADuC812 to ADuC831 or ADu832?

     

    A 

    There are two documents which explain how to migrate from the ADuC812 to
    ADuC831 and 832.

    uC020: Migrating from ADUC812 to ADUC831
    uC016: Migrating from ADUC812 to A…

  • Does ADuC831 have an internal pull-down resistor connected to RESET pin?

    Q 

    1) Does ADuC831 have an internal pull-down resistor connected to RESET pin? If
    so what value (in kohms) is it. If no - should I use an external resistor?

    2) Is Aduc 831 reset after power-on? Or do I have to use RC on RST pin to force
    high state…

  • ADUC831:  What is the value of internal pull-ups in ports P2 and P3?

    Q 

    What is the value of internal pull-ups in ports P2 and P3?

     

    A 

    There are weak pullups on P2 / P3 ports.
    You can see this when you look at the datasheet specifications.
    Look under "DIGITAL OUTPUTS"
    Isource for Voh (page 5) is only 20uAmps…

  • RE: ADuC831

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • RE: ADuC831 Flash memory prog. spec.

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • Analog input noisy when timer is 8Khz - ADuC831

    I have an application where an ADuC831 is being used to sample a frequency input on Pin 1 (T2) input, and the rest of ADC pins are being used to sample analog voltages.

    I noticed that when the timer input is exactly 8Khz, the remaining analog inputs…

  • ADUC831  AD采样程序和定时中断程序会有干扰？

    用     ADUC831进行AD采样，定时器0定时50ms，每定时20次，也就是1S数码管显示一个采样值，同样的程序在STC89C52可以实现，在ADUC831就不可以，什么原因呢？将AD采样程序注释掉，单独利用定时中断控制数码管和LED灯又可以实现，放在一起就不可以~