Because cost reduction due to its utility is almost negligible in comparison to total cost of microcontroller boardģ7) Which version of MCS-51 requires the necessary connection of external clock source to XTAL2 in addition to the XTAL1 connectivity to ground level?ģ8) Which signal from CPU has an ability to respond the clocking value of D- flipflop (bit latch) from the internal bus?ģ9) Which among the below mentioned statements are precisely related to quasi-bidirectional port?Ī. Because they are unstable as compared to quartz crystalsĬ. Because they do not avail for 12 MHz higher order frequenciesī.
Eon timer 1.6 for 64 bit serial#
Ability to store the result after the execution of an instructionġ0) Which general purpose register holds eight bit divisor and store the remainder especially after the execution of division operation?ġ1) How many registers can be utilized to write the programs by an effective selection of register bank in program status word (PSW)?ġ2) Which operations are performed by stack pointer during its incremental phase?ġ3) Which is the only register without internal on-chip RAM address in MCS-51?ġ4) What kind of instructions usually affect the program counter?ġ5) What is the default value of stack once after the system undergoes the reset condition?ġ6) Which bit/s play/s a significant role in the selection of a bank register of Program Status Word (PSW)?ġ7) Which flags represent the least significant bit (LSB) and most significant bit (MSB) of Program Status Word (PSW) respectively?ġ8) Which register bank is supposed to get selected if the values of register bank select bits RS1 & Rs0 are detected to be ‘1’ & ‘0’ respectively?ġ9) It is possible to set the auxiliary carry flag while performing addition or subtraction operations only when the carry exceeds _Ģ0) Which locations of 128 bytes on-chip additional RAM are generally reserved for special functions?Ģ1) Which commands are used for addressing the off-chip data and associated codes respectively by data pointer?Ģ2) Which instruction find its utility in loading the data pointer with 16 bits immediate data?Ģ3) What is the maximum capability of addressing the off-chip data memory & off-chip program memory in a data pointer?Ģ4) Which among the below stated registers does not belong to the category of special function registers?Ģ5) Which timer is attributed to the register pair of RCAP2H & RCAP2L for capture mode operation?Ģ6) Which registers are supposed to get copied into RCAP2H & RCAP2L respectively due to the transition at 8052 T2EX pin in the capture mode operation?Ģ7) Which mode of timer 2 allow to hold the reload values with an assistance of RCAP2H & RCAP2L register pair?Ģ8) Where should the pin 19 (XTAL1), acting as an input of inverting amplifier as well as part of an oscillator circuit, be connected under the application of external clock?Ģ9) Which port does not represent quasi-bidirectional nature of I/O ports in accordance to the pin configuration of 8051 microcontroller?ģ0) What is the required baud rate for an efficient operation of serial port devices in 8051 microcontroller?ģ1) Which among the below mentioned functions does not belong to the category of alternate functions usually performed by Port 3 (Pins 10-17)?ģ2) What is the constant activation rate of ALE that is optimized periodically in terms of an oscillator frequency?ģ3) Which output control signal is activated after every six oscillator periods while fetching the external program memory and almost remains high during internal program execution?ģ4) Which memory allow the execution of instructions till the address limit of 0FFFH especially when the External Access (EA) pin is held high?ģ5) Which value of disc capacitors is preferred or recommended especially when the quartz crystal is connected externally in an oscillator circuit of 8051?ģ6) Why are the resonators not preferred for an oscillator circuit of 8051?Ī.
Ability to store one of the operands before the execution of an instructionī.
Eon timer 1.6 for 64 bit code#
size of code = size of on-chip program memoryĪNSWER: (a) size of code < size of on-chip program memoryĨ) Which among the below mentioned devices of MCS-51 family does not possess two 16 -bit timers/counters?ĩ) Which characteristic/s of accumulator is /are of greater significance in terms of its functionality?Ī. size of code size of on-chip program memoryĬ. 6) Why is CHMOS technology preferred over HMOS technology for designing the devices of MCS-51 family?ħ) Which condition approve to prefer the EPROM/ROM versions for mass production in order to prevent the external memory connections?Ī.
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