NOTE !! You must answer them all OR leave them to another Instructor.

Be aware These multiple choices from class "8051 Microcontroller and Embedded Systems"

Give direct answers!

29. To get a 50-ms delay, what decimal value should be loaded into the 8051 timer register using 16-bit mode? Assume that XTAL 12 MHz. A. 19456 )15536 C. 46080 D. 65536 30. For all available timer modes in the 8051, which is the largest bit size for Timer 0 and Timer 1? A. 8 B. 13 C) 16 D. 32 31. Which of the following is a true statement regarding 8051 timers? A 8051 timers only count up B. 8051 timers only count down. C. 8051 timers can count both up and dowr. D. All 8051 timers can be used to control baud rate. 32. In timing applications, 8051 timers can be started or stopped by A. the TF control bits B. the TR control bits C. an external gating signal DJ either the TR control bits or an external gating signal 33. After a reset, the SP will contain 34, The stack mus exit in A s. tye memory. type memory. 35. A PUSH instruction will cause the SP to be acte 36. A POP instruction will cause the SP to be - 37. Subroutine call will cause the current PC to be um 38. The PSEN control when active is used foe memory access 39. The ALE control is used when active to indicate a complete 40. On return from a subroutine, the PC is updated by ne ll cause the SPto be da th uncon when knch .cycle. on the bus