Its a 8051 based CPU with inbuilt flash memory(ISP - In-System Programming). It can be flashed through SPI(serial peripheral Interface). AT89C51RD2 has similar features but its flash memory can be programmed through serial interface (RS-232).
There is no bootloader available for at89s51(atmel version of 8051)....bcos of absence of bootloader section in at8s51....but u can always use bootloader if u have p89vrs51...this is also an 8051 based controller but it has a bootloader section in it....
That depends on the specific microcontroller.
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The PIC is a specific architecture of microcontroller.
The voltage of the 8031 microcontroller is 2.7V to 5.5V.
The 8051 Microcontroller is a microcontroller ("chip") developed by Intel in 1980.
PIC Microcontroller which means Peripheral Interface Controller. PIC Microcontroller is originally developed by General Instrument's Microelectronics Division.
to determine the state condition of microcontroller's input when microcontroller is reading the input port
Segger Microcontroller Systems was created in 1991.
The difference is base on the requirement of their0 application.
microcontroller is a computer on a chip (IC) which contains processor which is programmed mainly by C language and used to control systems such as elevator, cars.... and so on.PIC is a type of microcontroller products from micochip company.
Microcontroller = (microprocessor+memory+peripherals) on a single chip