Atmel AT89 series

{{Short description|Intel 8051-compatible family of 8 bit microcontrollers}}

Image:Atmel 89c2051 gfdl.jpg in circuit]]

The Atmel AT89 series is an Intel 8051-compatible family of 8 bit microcontrollers (μCs) manufactured by the Atmel Corporation.

Based on the Intel 8051 core, the AT89 series remains very popular as general purpose microcontrollers, due to their industry standard instruction set, their low unit cost, and the availability of these chips in DIL (DIP) packages. This allows a great amount of legacy code to be reused without modification in new applications. While less powerful than the newer AT90 series of AVR RISC microcontrollers, new product development has continued with the AT89 series for the aforementioned advantages.

More recently, the AT89 series has been augmented with 8051-cored special function microcontrollers, specifically in the areas of USB, I²C (two wire interface), SPI and CAN bus controllers, MP3 decoders and hardware PWM.

Atmel has also created an LP (low power) series of these chips with a "Single Cycle Core", making the execution speed of these chips considerably faster.

AT89 Series Microcontrollers

class="wikitable"

! Device name

! Flash memory size

! Data memory size

AT80C51RD2{{cite web |title=AT80C51RD2 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT80C51RD2 |website=www.microchip.com |accessdate=13 September 2020}}

| 64KB Flash{{cite web |title=Ferret |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc4113.pdf |website=www.microchip.com |accessdate=13 September 2020}}

| 1024 bytes RAM

AT83C5134{{cite web |title=AT83C5134 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT83C5134 |website=www.microchip.com |accessdate=13 September 2020}}

| -none-

| 1024 bytes RAM

AT83C5135{{cite web |title=AT83C5135 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT83C5135 |website=www.microchip.com |accessdate=13 September 2020}}

| -none-

| 1024 bytes RAM

AT83C5136{{cite web |title=AT83C5136 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT83C5136 |website=www.microchip.com |accessdate=13 September 2020}}

| -none-

| 1024 bytes RAM

AT83EB5114{{cite web |title=AT83EB5114 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT83EB5114 |website=www.microchip.com |accessdate=13 September 2020}}

| -none-{{cite web |title=AT83EB5114 AT89EB5114 |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc4311.pdf |website=www.microchip.com |accessdate=13 September 2020}}

| 256 bytes RAM

AT89C1051

| 1KB Flash

| 64 bytes RAM

AT89C2051{{cite web |title=AT89C2051 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C2051 |website=www.microchip.com |accessdate=13 September 2020}}

| 2KB Flash

| 128 bytes RAM{{cite web |title=AT89C2051 |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc0368.pdf |website=microchip.com |accessdate=13 September 2020}}

AT89C4051{{cite web |title=AT89C4051 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C4051 |website=www.microchip.com |accessdate=13 September 2020}}

| 4KB Flash

| 128 bytes RAM{{cite web |title=AT89C4051 |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc1001.pdf |website=microchip.com |accessdate=13 September 2020 |date=5 August 2012}}

AT89C51/S51

| 4KB Flash

| 128 bytes RAM

AT89C5115{{cite web |title=AT89C5115 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C5115 |website=www.microchip.com |accessdate=13 September 2020}}

| 16KB Flash

| 256 bytes RAM{{cite web |title=Low Pin Count 8-bit MCU with A/D converter and 16 KB Flash Memory |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc4128.pdf |website=www.microchip.com |accessdate=13 September 2020}}

AT89C5130A-M{{cite web |title=AT89C5130A-M - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C5130A-M |website=www.microchip.com |accessdate=13 September 2020}}

| 16KB Flash

| 1024 bytes RAM

AT89C5131A-L{{cite web |title=AT89C5131A-L - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C5131A-L |website=www.microchip.com |accessdate=13 September 2020}}

| 32KB Flash

| 1024 bytes RAM

AT89C5131A-M{{cite web |title=AT89C5131A-M - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C5131A-M |website=www.microchip.com |accessdate=13 September 2020}}

| 32KB Flash

| 1024 bytes RAM

AT89C51AC2{{cite web |title=AT89C51AC2 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C51AC2 |website=www.microchip.com |accessdate=13 September 2020}}

| 32KB Flash

| 1024 bytes RAM

AT89C51AC3{{cite web |title=AT89C51AC3 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C51AC3 |website=www.microchip.com |accessdate=13 September 2020}}

| 64KB Flash

| 2048 bytes RAM

AT89C51ED2{{cite web |title=AT89C51ED2 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C51ED2 |website=www.microchip.com |accessdate=13 September 2020}}

| 64KB Flash

| 1792 bytes RAM

AT89C51IC2{{cite web |title=AT89C51IC2 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C51IC2 |website=www.microchip.com |accessdate=13 September 2020}}

| 32KB Flash

| 256 bytes RAM

AT89C51ID2{{cite web |title=AT89C51ID2 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C51ID2 |website=www.microchip.com |accessdate=13 September 2020}}

| 64KB Flash

| 1792 bytes RAM

AT89C51RC{{cite web |title=AT89C51RC - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C51RC |website=www.microchip.com |accessdate=13 September 2020}}

| 32KB Flash

| 512 bytes RAM

AT89C51RD2{{cite web |title=AT89C51RD2 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C51RD2 |website=www.microchip.com |accessdate=13 September 2020}}

| 64KB Flash

| 1792 bytes RAM

AT89C52/S52{{cite web |title=AT89S52 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89S52 |website=www.microchip.com |accessdate=13 September 2020}}

| 8KB Flash

| 256 bytes RAM{{cite web |title=AT89S52 |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc1919.pdf |website=www.microchip.com |accessdate=13 September 2020}}

AT89C55/55WD{{cite web |title=AT89C55/55WD - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89C55WD |website=www.microchip.com |accessdate=13 September 2020}}

| 20KB Flash

| 256 bytes RAM

AT89EB5114{{cite web |title=AT89EB5114 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89EB5114 |website=www.microchip.com |accessdate=13 September 2020}}

| 4KB Flash

| 256 bytes RAM

AT89LP213{{cite web |title=AT89LP213 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89LP213 |website=www.microchip.com |accessdate=13 September 2020}}

| 2KB Flash

| 128 bytes RAM{{cite web |title=3538E.book |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc3538.pdf |website=microchip.com |accessdate=13 September 2020}}

AT89LP214{{cite web |title=AT89LP214 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89LP214 |website=www.microchip.com |accessdate=13 September 2020}}

| 2KB Flash

| 128 bytes RAM

AT89LP216{{cite web |title=AT89LP216 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89LP216 |website=www.microchip.com |accessdate=13 September 2020}}

| 2KB Flash

| 128 bytes RAM{{cite web |title=3621E.book |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc3621.pdf |website=microchip.com |accessdate=13 September 2020}}

AT89LP2052{{cite web |title=AT89LP2052 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89LP2052 |website=www.microchip.com |accessdate=13 September 2020}}

| 2KB Flash

| 256 bytes RAM{{cite web |title=3547J.book |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc3547.pdf |website=microchip.com |accessdate=13 September 2020}}

AT89LP3240{{cite web |title=AT89LP3240 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89LP3240 |website=www.microchip.com |accessdate=13 September 2020}}

| 64KB Flash

| 4352 bytes RAM

AT89LP4052{{cite web |title=AT89LP4052 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89LP4052 |website=www.microchip.com |accessdate=13 September 2020}}

| 4KB Flash

| 256 bytes RAM

AT89LP6440{{cite web |title=AT89LP6440 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89LP6440 |website=www.microchip.com |accessdate=13 September 2020}}

| 64KB Flash

| 4352 bytes RAM

AT89LS51{{cite web |title=AT89LS51 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89LS51 |website=www.microchip.com |accessdate=13 September 2020}}

| 4KB Flash

| 128 bytes RAM{{cite web |title=AT89LS51 |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc3053.pdf |website=www.microchip.com |accessdate=13 September 2020}}

AT89LS52{{cite web |title=AT89LS52 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89LS52 |website=www.microchip.com |accessdate=13 September 2020}}

| 8KB Flash

| 256 bytes RAM{{cite web |title=AT89LS52 |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc2601.pdf |website=www.microchip.com |accessdate=13 September 2020}}

AT89S2051{{cite web |title=AT89S2051 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89S2051 |website=www.microchip.com |accessdate=13 September 2020}}

| 2KB Flash

| 256 bytes RAM{{cite web |title=AT89S2051/S4051 Preliminary Datasheet |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc3390.pdf |website=microchip.com |accessdate=13 September 2020}}

AT89S4051{{cite web |title=AT89S4051 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89S4051 |website=www.microchip.com |accessdate=13 September 2020}}

| 4KB Flash

| 256 bytes RAM

AT89S51{{cite web |title=AT89S51 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89S51 |website=www.microchip.com |accessdate=13 September 2020}}

| 4KB Flash

| 128 bytes RAM{{cite web |title=AT89S51 |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc2487.pdf |website=www.microchip.com |accessdate=13 September 2020}}

AT89S53

| 12KB Flash

| 256 bytes RAM

AT89S8252{{cite web |title=AT89S8252 |url=http://ww1.microchip.com/downloads/en/DeviceDoc/doc0401.pdf |website=microchip.com |accessdate=13 September 2020}}

| 8KB Flash

| 256 bytes RAM

AT89S8253{{cite web |title=AT89S8253 - Microcontrollers and Processors |url=https://www.microchip.com/wwwproducts/en/AT89S8253 |website=microchip.com |accessdate=13 September 2020}}

| 8KB Flash

| 256 bytes RAM

Port Structures and Operation

All four ports in the AT89C51 and AT89C52 are bidirectional. Each consists of a latch (Special Function Registers P0 through P3), an output driver, and an input buffer. The output drivers of Ports 0 and 2, and the input buffers of Port 0, are used in accesses to external memory. In this application, Port 0 outputs the low byte of the external memory address, time-multiplexed with the byte being written or read. Port 2 outputs the high byte of the external memory address when the address is 16 bits wide. Otherwise the Port 2 pins continue to emit the P2 SFR content. All the Port 3 pins, and two Port 1 pins (in the AT89C52)are multifunctional. The alternate functions can only be activated if the corresponding bit latch in the port SFR contains a 1. Otherwise the port pin is stuck at 0.

External links

[https://web.archive.org/web/20131015140634/http://www.atmel.com/products/microcontrollers/8051architecture/default.aspx Atmel's 8051 family product page, updated link 09/23/2012]

References

Category:Atmel microcontrollers