# week_3_quiz - 1(TCO 3 Free-running TCNT TOF(timer overflow...

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1. (TCO 3) Free-running TCNT TOF (timer overflow flag) goes high when it makes a transition from (Points : 5) FF to 00. 0000 to FFFF. FFFF to 0000. 3FFF to 0000. Question 2. 2. (TCO 3) Capturing the time of the rising edge of a signal followed by capturing the falling edge of a signal, which statement is correct? (Points : 5) The frequency of the signal can be determined. The duty cycle of the signal can be calculated. The period of the signal can be calculated. The pulse width of the signal can be determined. Question 3. 3. (TCO 3) The operation of combining two independent 9S12G128 8-bit PWM counters as a single 16-bit counter is called which of the following?

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Unformatted text preview: (Points : 5) Concatenation Combination Concurrency Connectivity Question 4. 4. (TCO 3) A PWM is to be programmed to output a signal with a pulse high width of 150 usec and a pulse low width of 250 usec. What are the values required for prescale (if any) PWMPER and PWMDTY? An 8-bit configuration is used and the E-clock is 24 MHz. (Points : 10) Total time of cycle=150+250=400 usec Hence total number of counts minimum required=(400*10^-6)/(1/24*10^(-8))=9600 1198009323 MultipleChoice 4 1198009324 MultipleChoice 12 1198009325 MultipleChoice 15 However maximum count possible =2^8=256 Since 9600/256=37.5 Thus value of PRESCALER required=64...
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• Spring '12
• Pulse-width modulation, usec, 8-bit PWM counters, timer overflow flag, Free-running TCNT TOF

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