ADUC834: FAQ

ADUC: Should I connect devices analog and digital ground pins to separate ground planes?

Q The MicroConverter has separate pins for analog and digital grounds. Should I connect these to two separate ground planes on my board? A No. At least, not unless the two ground planes are connected…

ADUC824/834 microconverter's temperature sensor

Q Can you please supply the specification for the on-board temperature sensor on the ADUC824/ADUC834 devices? I need an accurate description of the temp channel. This doesn't appear in the datasheets…

ADUC834: Can I convert a single-ended input voltage by grounding one of primary ADC diff inputs?

Q The primary ADC is differential. Can I convert on a single-ended input voltage by grounding one of the inputs?. A No, the ADC inputs for the primary ADC cannot be within 100mV of the rails. Hence…

ADUC834: Can I use analog inputs on Port 1 pins for digital I/0?

Q Port 1 on the ADuC834 is primarily used for analog inputs. Can I use Port 1 pins for digital I/0? If so, how? A Pins 1.2 to P1.7 inclusive are analog input/digital input pins. They have no digital…

ADUC834: Do I need external reset generator?

Q Will I need to implement an external reset generator circuit for my ADuC834 design? A No, you will not have to implement an external reset generator. The ADuC834 has an integrated robust power…

ADUC834: Does changing the PLL divider value via the CD bits in PLLCON affect the baud rate?

Q Does changing the PLL divider value via the CD bits in PLLCON affect the baud rate? A Yes, changing the CD bits does affect the baud rate. The output of the PLL divider is the core clock frequency…

ADUC834: Driving LEDs directly from digital outputs, what pins should I use?

Q I want to drive LEDs directly from some digital outputs what pins should I use? A The high drive port pins are P1.0 and P1.1. Both of these port pins are tested to sink 10mA and keep the VOL…

ADUC834: How do I configure the UART serial port at 9600/115200 baud?

Q How do I configure the ADuC834 UART serial port at 9600/115200 baud? A The UART serial port on the ADuC834 can be configured for 9600 baud using the following piece of code (assuming CD in PLLCON…

ADUC834: How do I use the on-chip temperature sensor feature of the ADuC834?

Q How do I use the on-chip temperature sensor feature of the ADuC834? A The temperature sensor on the ADuC834 is converted by the auxiliary ADC to output a digital code to represent the chip temperature…

ADUC834: I am changing ranges and I am seeing much more than 2uV gain mis-match. Why?

Q ADuC834: I am changing ranges and I am seeing much more than 2uV gain mis-match. Why? A You should not see much more than 2uV gain matching. i.e. as you changes the range from one range to another…

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