.. networks to distinguish between them. The design described here is much simpler. The microprocessor pin is connected to the clock of a multiple-output sequential counter (Figure 1). In its simplest form, this state machine consists of two D ...
.. circuit was developed for a portable instrument using a 28-pin PIC MCU from Microchip Technology running an RTC (real time clock), EEPROM, and COG (chip on glass) LCD on the I 2 C bus, and a digital pot and microSD card on the SPI bus. The ...
.. microcontroller are in C and use the open-source AVR GCC compiler. The AVR ATtiny13 microcontroller operates at an internal clock frequency of 9.6 MHz without an internal-clock-frequency divider, so the PWM frequency is 9.6 MHz/256 = 37.5 ...
.. time constant, a zero shifts into the register. If the low state is short, then a one shifts into the register. The clock and data signals thus combine into one signal. A lowpass filter separates the clock and data signals (Figure ...
.. plus ground, the host controller can address the target device and exchange data, whereas SPI requires three wires data, clock, and chip-selection plus ground. Multiple SPI-target devices can share data and clock lines, but each device ...
.. resolution. Alternatively, you can take those three bits from the top of the original PWM duty-cycle value, multiplying its clock rate by eight. You still get the 8:1 ripple reduction, but the increased clock rate pushes PWM noise further ...
.. rise-time, and faster PWM frequency translates to lower resolution when achieved by reducing the counter size at a given clock frequency. I am going to talk about an interesting Design Idea that focuses on lowering the ripple of PWM DACs ...
.. inverter. This negative-going edge is used as an interrupt to the processor. The Arduino Uno, operating with a 16-MHz clock, is programmed to use Timer0 to set up the PWM output OCRA at 244 Hz with the pulse-width set to 224/255 ...
.. desired to check the state of the batteries more often. This code segment can be used to test the circuit: Init(GPIO,Clock,etc..); void Test_BattMon(void) { // Using pin PA0 to drive and to sample the Battery monitor while(l) { ...
.. amplify the LED's minuscule output voltage. The circuit also exploits the microprocessor's onboard low-frequency clock oscillator, which allows low-powered operation without an external crystal. The resultant circuit includes only ...