7. If the 8051 can operate using a 16 MHz crystal connected to its XTAL1 and XTAL2 inputs, and MOVX instructions are not used, what is the frequency of the signal on ALE? 8. If an 8051 is operating from a 6MHz crystal, what is the duration of the machine cycle? 9. How much time the reset needs to be high? 10. What is the bit address of bit 3 in byte address 2FH in the 8051's internal data memory? 11.Identify the bit position and byte address for each of the following SETB instructions. a. SETB 37H b. SETB OF7H c. SETB 0A8H 12. What is the state of the P bit in the program status word after execution of each of the following instructions? a. MOV A,#0F8H b. MOV A,#OFFH c. CLR A 13. Consider the instruction MOV SP, # OBFH. What is the effect of this instruction if executed on an 8051? 14. What is the difference between the 8051's idle mode and power-down mode?

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