Microchip

8051 MİCROPROCESSOR AND AT89S8253 MİCROCONTROLLER

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KL Intel P8051

8051 MİCROPROCESSOR AND AT89S8253 MİCROCONTROLLER

 

8051 is the world’s most popular 8-bit microprocessor, presented by the Intel firm to the market in the early 1980s. For this microprocessor, many manufacturers (such as Microchip,Philips, Dallas,Siemens, Oki and Matra/Harris), especially Intel, have offered a wide range of hardwareand software support and, as a result, 8051 has been an industry standard since 1980s.
The 8051 family is sometimes referred to as the MCS-51 (Microcomputer System – MCS) family. Theletters “MCS” have traditionally been used by Intel to describe a system or microcomputer and its components that include CPUs, memories, clock generators, input/output units, and etc. The 8051 and MCS-51 representations are used synonymously to indicate the same family, and generally do notspecify a processor, but are used as names of the family. However, 8051 is also the name of one of thefirst members of the MCS-51 family, 8051, 8751 and 8031 microprocessors. Today, among the various microprocessor families, the 8051 family has a market share of about 40% with advanced products.

 

The main features of the 8051 microcontroller

• 8-bit CPU for control applications
• Ability to perform intensive Boolean operations (single-bit logic operations)
• 64K Program Memory
• 64K Data Memory
• 4K on-chip program memory
• 128 byte on-chip data RAM
• 32 bidirectional addressable I/O lines
• Two 16-bit Timer/Counter
• Full duplex UART (Universal Asynchronous Receiver Transmitter)
• On-chip clock oscillator

8051 ve 8052 microcontrollers simplified block diagram

(8051  ve 8052  microcontrollers simplified block diagram)

 

AT89S8253 Microcontroller

Peripherals built in microcontroller architectures are constantly developing in parallel with the needs and technological developments in industrial applications, and new peripherals are added to microcontroller architectures. The 8051 family, which was originally produced by the Intel company in 1980, is constantly developed and the new generation members of the 8051 family, which can meet the needs of industrial applications while preserving the essential features of the standard 8051 architecture, are produced by many companies.

AT89S8253 Microcontroller has the following features:

• Compatible with MCS-51 Products
• 12K Bytes of In-System Programmable (ISP) Flash Program Memory
– SPI Serial Interface for Program Downloading
– Endurance: 10,000 Write/Erase Cycles
• 2K Bytes EEPROM Data Memory
– Endurance: 100,000 Write/Erase Cycles
• 2.7V to 5.5V Operating Range
• Fully Static Operation: 0 Hz to 24 MHz
• Three-level Program Memory Lock
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• 256 x 8-bit Internal RAM
• 32 Programmable I/O Lines
• Three 16-bit Timer/Counters
• Nine Interrupt Sources
• Enhanced UART Serial Port with Framing Error Detection and Automatic Address Recognition
• Enhanced SPI (Double Write/Read Buffered) Serial Interface
• Low-power Idle and Power-down Modes
• Interrupt Recovery from Power-down Mode
• Programmable Watchdog Timer
• Dual Data Pointer
• Power-off Flag
• Flexible ISP Programming (Byte and Page Modes)
– Page Mode: 64 Bytes/Page for Code Memory, 32 Bytes/Page for Data Memory
• Four-level Enhanced Interrupt Controller
• Programmable and Fuseable x2 Clock Option
• Internal Power-on Reset
• 42-pin PDIP Package Option for Reduced EMC Emission

AT89S8253 block diagram

(AT89S8253 block diagram)

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