Midterm Exam Solutions Fall 2023

PwnHero I Student Name: Student ID: Ql [18 marks (1.5 marks each)] Use a pen to circle the right answer(s) a) For applications with more than one managed PSV pages, JSR declaration header is / i. void _attribute_ (( _interrupt_)) mylnterruptHandler(void) +- ® void _attribute_ (( _interrupt_,no_auto_psv)) mylnterruptHandler(void) ~iii. void _attribute_ (( _interrupt_, auto_psv)) mylnterruptHandler(void) iv. void _attribute_ (( _interrupt_,multiple_psv)) mylnterruptHandler(void) b) Instruction frequency Fcv is derived from the oscillator frequency as follow: q) Fcv=Fosd2 11. Fcv=Fosd4 iii. Fcv=Fosc iv. Fcv=Fosd8 c) .,.Q.ne of these registers is used to c nfigure MCU oscillator at power on '-!.) OSCCON ii. CLKDIV 111. OSCTUN ~v. CONFIG2 d) #J>ragma config FNOSC = FRCPLL sets thC/e MCU oscillator as GJ Fast RC oscillator with PLL ii. Primary oscillator with PLL 111. Low-power RC oscillator 1v. Fat RC oscillator with postscalller divider e) The result of the logical bit shift operation 0xC9<<3 is i. 0x4F i2-. q @ 0x48 c_/, do 1 00 I 111. 0xC8 o \ o o I o D o IV. None of the above l-\ -~ f) Interrupt Vector is / i. The starting address of the main function code V ii. Contains the interrupt vectors for all ISRs @ The starting address of~ ISR . . . iv. A single bit is set each time an mterrupt IS activated g) The test statement in while((PORTF & 0x0008)=0), i. Returns true if RF8 = 0 / \ oo D ii. Returns false if_ RF8 = 0 V '.!i 1 ' 0 @Returns true if _RF3 = 0 iv. Returns true if RF3 = 1 h) For 20 milliseconds delay, Fcv=4 MHz, and Timer 2 prescaler 1:64, the Period Register (PR2) is set to 1. 1251 ii. 1250 -' 2 PwnHero.com