INTRODUCTION TO MICROPEOCESSOR
MICRO PROCESSOR AND MICRO CONTROLLER
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Detailed explanation-1: -3. 8051 series has how many 16 bit registers? Explanation: It has two 16 bit registers DPTR and PC.
Detailed explanation-2: -DPTR – Data pointer is the 8051’s only user-accessible 16 bit (2-byte) register. DPTR is meant for pointing to data. It is used by the 8051 to access external memory using the address indicated by DPTR. It is used to stone 2-byte value.
Detailed explanation-3: -In Intel 8051, there are two 16-bit timer registers. These registers are known as Timer0 andTimer1. The timer registers can be used in two modes. These modes areTimer mode and the Counter mode.
Detailed explanation-4: -The block diagram of 8051 microcontroller is shown in Fig 3. below1.It consists of an 8-bit ALU, one 8-bit PSW(Program Status Register), A and B registers, one 16-bit Program counter, one 16-bit Data pointer register(DPTR), 128 bytes of RAM and 4kB of ROM and four parallel I/O ports each of 8-bit width.