AT89C4051-12SU

Operating Temperature Range :
Data Bus Width : 8 bit
Mounting Style : SMD/SMT
Core : 8051
Processor Series : AT89x
Program Memory Size : 4 KB
Data RAM Size : 128 B
On-Chip ADC : No
Maximum Clock Frequency : 24 MHz
Package / Case : SOIC
Operating Supply Voltage : 2.7 V to 6 V


Pinout




Description

The AT89C4051-12SU is one member of the AT89C4051 series.It has the following features including (1)4K bytes of reprogrammable flash memoryendurance: 1,000 write/erase cycles;(2)programmable serial UART channel;(3)low-power idle and power-down modes;(4)green (Pb/Halide-free/RoHS compliant) packaging.

The AT89C4051 is a low-voltage, high-performance CMOS 8-bit microcontroller with 4K bytes of Flash programmable and erasable read-only memory. The device is manufactured using Atmel's high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51instruction set. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C4051 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications.The AT89C4051 provides the following standard features: 4K bytes of Flash,128 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five-vector, two-level interrupt architecture, a full duplex serial port, a precision analog comparator, on-chip oscillator and clock circuitry. In addition, the AT89C4051 is designed with static logic for operation down to zero frequency and supports two software-selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters,serial port and interrupt system to continue functioning. The power-down mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next hardware reset.

The AT89C4051 is an economical and cost-effective member of Atmel's growing family of microcontrollers.It contains 4K bytes of Flash program memory. It is fully compatible with the MCS-51architecture, and can be programmed using the MCS-51 instruction set. However, there are a few considerations one must keep in mind when utilizing certain instructions to program this device.All the instructions related to jumping or branching should be restricted such that the destination address falls within the physical program memory space of the device, which is 4K for the AT89C4051. This should be the responsibility of the software programmer. For example, LJMP 0FE0H would be a valid instruction for the AT89C4051 (with 4K of memory), whereas LJMP 1000H would not.

Parameters:

Technical/Catalog Information	AT89C4051-12SU
Vendor	Atmel
Category	Integrated Circuits (ICs)
Program Memory Size	4K x 8
RAM Size	128 x 8
Number of I /O	15
Package / Case	20-SOIC
Speed	12MHz
Controller Series	89C
Oscillator Type	Internal
Packaging	Tube
Program Memory Type	FLASH
EEPROM Size	-
Core Processor	8051
Data Converters	-
Core Size	8-Bit
Operating Temperature	-40°C ~ 85°C
Connectivity	UART/USART
Peripherals	Brown-out Detect/Reset, LED, POR
Voltage - Supply (Vcc/Vdd)	2.7 V ~ 6 V
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	AT89C4051 12SU AT89C405112SU