29. To get a 60-ms delay, what decimal value should be loaded into the 8o51 time

Question

29. To get a 60-ms delay, what decimal value should be loaded into the 8o51 timer register using 16-bit mode? Assume that XTAL MHz. A 19456 B. 5536 C. 46080 D. 65536 and Timer 1? 30. For all available timer modes in the 8051, which is the largest bit size for Timer 0 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 down. 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 D. either the TR control bits or an external gating signal 33. After a reset, the SP will contain 34. The stack must exist in type memory. 35. A PUSH instruction will cause the SP to be 36. A POP instruction will cause the SP to be 37. Subroutine call will cause the current PC to be 38. The PSEN control when active is used for memory access ---------cycle. 39. The ALE control is used when active to indicate a complete on the bus. 40. On return from a subroutine, the PC is updated by

Explanation / Answer

Multiple Questions : ANswering 4.

30. c) 16 bit

[8, 13 and 16 are availabe bit sizes]

33. FFFFh.

[The last address of memory in 8085]

35.SP is decremented by two

36. SP is incremented by two

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