1. 8051 Microcontrollers

1.1. 8051/8052 Microcontroller Features

The following list shows the most important features of the 8051/8052 family microcontrollers.

• 80C51 based architecture with 8-bit CPU.
• Processor with support Boolean operations on bits.
• Integrated Program Memory 8K × 8 EPROM (87C52 case).
• No internal program memory ROMless (case 80C32).
• Internal RAM of 256 x 8.
• Three meters of 16-bit timers (counter / timers).
• A channel for full duplex asynchronous serial RS-232 communications.
• Memory addressing capability 64k ROM and 64k RAM.
• Modes in low power consumption (Idle mode Power-down mode).
• Compatible with TTL and CMOS digital technologies.
• Clock frequencies including body work 3.5 to 33MHz.
• Internal oscillator.
• 6 interrupt sources with different levels of priority.
• 2 external interrupts.
• 3 breaks counters / timers (timers).
• 1 interrupt for serial port.

The block diagram of the 80C32 microcontroller can be seen in the figure below.

Bloquesde diagram the internal structure of microcontroller 8051