WebInstead, some special registers in some processor architectures require special instructions to modify them. In the 8051, register A, B, DPTR, and PSW are a part of the group of registers commonly referred to as SFR (special function registers). An SFR can be accessed by its name or by its address. WebThe Data Pointer (DPTR) is the 8051’s only user-accessible 16-bit (2-byte) register. The Accumulator, R0–R7 registers and B register are 1-byte value registers. DPTR is meant for pointing to data. It is used by the 8051 to access external memory using the address … Embedded Systems Registers Bank Stack - The 8051 microcontroller has a total of … Embedded Systems Overview - A system is an arrangement in which all its unit … Embedded Systems Timer Counter - A timer is a specialized type of clock which … Embedded Systems 8051 Microcontroller - The first microprocessor 4004 was … Embedded Systems Interrupts - An interrupt is a signal to the processor emitted by … Embedded Systems Processors - Processor is the heart of an embedded … Embedded Systems Architecture Types - The 8051 microcontrollers work with 8 … A Special Function Register (or Special Purpose Register, or simply Special … Embedded Systems Instructions - The flow of program proceeds in a sequential … Embedded Systems Quick Guide - A system is an arrangement in which all its …
Virtual function access (C++ only) - IBM
WebSelection of a register bank is made possible through a Special Function Register (SFR) named Processor Status Word (PSW). PSW is an 8-bit SFR where each bit can be programmed as required. Bits are designated from PSW.0 to PSW.7. ... MOVC A, @A+DPTR. and. MOVC A, @A+PC. where DPTR is the data pointer and PC is the … WebDPTR can address the maximum RAM space of 0000h to FFFFh. A register Data External RAM Data Internal And External ROM R0 or R1 DPTR DPTR + A PC + A 8051 Microcontroller ... The stack pointer (SP) is special function register. SP holds the indirect address whenever PUSHing or POPing. The SP register is set to 07h, when the 8051 … chris sainato election
8051 Data Pointer (DPTR) Register - Hobby Projects
WebJan 5, 2012 · Lets come to the point. There are 21 Special function registers (SFR) in 8051 micro controller and this includes Register A, Register B, Processor Status Word (PSW), PCON etc etc. There are 21 unique locations for these 21 special function registers and each of these register is of 1 byte size. Some of these special function registers are bit ... WebNov 25, 2024 · DPTR is meant for pointing to data. It is the 8051’s only user-accessible 16-bit (2-byte) register. The accumulator, R 0 –R 7 registers and B register are 1-byte value registers. It is used by the 8051 to access external memory using the address indicated by DPTR. DPTR is the only 16-bit register available and is often used to store 2-byte values. WebWe would like to show you a description here but the site won’t allow us. chris sainato facebook