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What is data pointer in microcontroller?
DPTR is a 16-bit register DPTR is made up of two 8-bit registers: DPH and DPL DPTR holds the memory addresses for internal and external code access and external data access (eg. MOVC A,@A+DPTR MOVX A,@DPTR MOVX @DPTR,A ) DPTR is under the control of program instructions and can be specified by its 16-bit name, or by each individual byte name, DPH and DPL DPTR does not have a single internal address; DPH and DPL are each assigned an address
What is the function of dptr?
The dptr (data pointer) is a register used in microcontroller architectures, particularly in the 8051 family, to point to data in memory. It facilitates access to data stored in external RAM or in the data memory space, allowing for efficient data manipulation and retrieval. By using dptr, programs can handle larger data sets and perform operations on data located beyond the internal memory limits.
The instruction sequence to store the value 0ABH in external RAM at address 9A00H?
To store the value 0ABH in external RAM at address 9A00H, you would typically use the following instruction sequence in assembly language for a microcontroller like the 8051. First, load the address into the DPTR register with MOV DPTR, #9A00H. Next, move the value 0ABH into the accumulator with MOV A, #0ABH. Finally, use MOVX @DPTR, A to transfer the value from the accumulator to the specified external RAM address.
How do you write a code using MOVC instruction?
clr a movc a,@a+dptr jz exit acall lcd_senddata inc dptr sjmp LCD_sendstring
What is look up table in 8051 microcontrollers?
A look-up table is a table of constants stored in program memory -Look-up tables can be used to speed up arithmetic operations -The look-up table may be accessed using the DPTR or PC as a pointer to the start of the table. The A register is used as an index to the table.
What is the full meaning of DPTR?
It is the stock market symbol for Delta Petroleum Corporation.
What is the value of relocation register?
what is resource allocate register why it is used
What purpose the register serve?
It used for storing bits and it can used to shift the bits from one position to another within the register or out of the register to another circuit.
What is a corporate register used for?
A corporate register is used for maintaining a good and healthy monetary situation, and financial state for the company that the corporate register is using.
What is count register purpose?
The 8085 does not have a specific "count" register. Any register can be used, in the larger context of a block of code, as a count register.
What is a pen register?
A pen register was used to record phone numbers called.
What are cash register software's used for?
Cash register software can be used as a means of looking into records and solving problems for customers in shops. They can be used at point of sale.
