26. For the 8051, what A. PC FFFFH s the content of the program counter (PC) upon reset? B. PC 00O0H C. PC 3FFFH D. PC value unknown 27. What is the result of NOT (0xAA)? B. 0x55 C. 0x00 D. 0x58 28. What is the magnitude of the unsigned integer data type? A.-128 to +127 B. 0 to 255 C. 0 to 65,535 D.-32,768 to +32,767 29. What is the frequency of the clock that is being used as the clock source for the timer? a) Externally applied frequency b) Controller's crystal frequency /12 c) Controller's crystal frequency d) Externally applied frequency /12 30. What is the function of the TMOD register? a) TMOD register is used to load the count of the timer. b) TMOD register is used to set timers or counter's to their appropriate modes c) Is the destination or the final register where the result is obtained after the operation of the timer d) is used to interrupt the timer 31. What is the maximum delay that can be generated with the crystal frequency of 24MHz? a) 2.9 sec b) 32.768 m sec c) 0.11 m sec d) 24 m sec