What are input and output registers?

The instruction read from memory is placed in the Instruction register (IR). The Temporary Register (TR) is used for holding the temporary data during the processing. The Input Registers (IR) holds the input characters given by the user. The Output Registers (OR) holds the output after processing the input data.

Which register is useful to set the direction either input or output?

The ports, often designated as data registers A and B (‘DRA’ and ‘DRB’) each have an associated data direction register (‘DDRA’ and ‘DDRB’), which is used for setting a bit on a port as either an input or an output.

Which of the following registers is used to select the functionality of a port pin in MSP430?

Selecting the Pins In MSP430 the port pins are shared among various peripherals like ADC inputs, Timers,Comparator inputs etc. To select the various functions associated with the same pins MSP430has two 8 bit registers called PxSEL and PxSEL2.

What is the function of input output address register?

Each I/O device monitors the CPU’s address bus and responds to any CPU access of an address assigned to that device, connecting the data bus to the desired device’s hardware register.

What is the purpose of port registers in 8051?

The 8051 Microcontroller Special Function Registers are used to program and control different hardware peripherals like Timers, Serial Port, I/O Ports etc. In fact, by manipulating the 8051 Microcontroller Special Function Registers (SFRs), you can assess or change the operating mode of the 8051 Microcontroller.

Which of the following registers is useful for deciding the direction of port pins to input or output?

DDRx register
DDRx register: These registers are used for determining whether port pins will be used for input or output.

What is the purpose of the PxOUT registers?

PxIN is for reading the input bits of pins that are in Digital I/O mode. PxOUT is for setting the value of pins that are in Digital I/O mode. PxDIR is for setting the direction of pins that are in Digital I/O mode. PxREN sets whether or not a pullup/pulldown resistor is enabled on inputs in Digital I/O mode.

What is the voltage range for MSP 432 to recognize an input as logic high?

1.62–3.7V supply voltage.

Why the address register is connected directly to the memory?

The memory address register is used to handle the address transferred to the memory unit, and this can be handled either using a bus approach (which we have used in this architecture) or direct input declaration for the memory.