Atmel 89S52 The Atmel AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set and pin out. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with in-system programmable Flash on a monolithic chip, the Atmel AT89S52 is a powerful micro controller which provides a highly-flexible and cost-effective solution to many embedded control applications. The AT89S52 provides the following standard features like 8K bytes of Flash, 256 bytes of RAM, 32 I/O lines, Watchdog timer, two data pointers, three 16-bit timer/counters, a six-vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator, and clock circuitry. In addition, the AT89S52 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. Pinout: Pinout Of Atmel 89S52 1 P1.0 (T2) Timer/Counter or 0th GPIO pin of PORT 1 2 P1.1 (T2.EX) Timer/Counter/External Counter or 1st GPIO pin of PORT 1 3 P1.2 2nd GPIO pin of PORT 1 4 P1.3 3rd GPIO pin of PORT 1 5 P1.4 4th GPIO pin of PORT 1 6 P1.5 (MOSI) MOSI for in System Programming or 5th GPIO pin of PORT 1 7 P1.6 (MISO) MISO for in System Programming or 6th GPIO pin of PORT 1 8 P1.7 (SCK) SCK for in System Programming or 7th GPIO pin of PORT 1 9 RST Making this pin high will reset the Microcontroller 10 P3.0 (RXD) RXD Serial Input or 0th GPIO pin of PORT 3 11 P3.1 (TXD) TXD Serial Output or 1st GPIO pin of PORT 3 12 P3.2 (INT0’) External Interrupt 0 or 2nd GPIO pin of PORT 3 13 P3.3 (INT1’) External Interrupt 1 or 3rd GPIO pin of PORT 3 14 P3.4 (T0) Timer 0 or 4th GPIO pin of PORT 3 15 P3.5 (T1) Timer 1 or 5th GPIO pin of PORT 3 16 P3.6 (WR’) Memory Write or 6th GPIO pin of PORT 3 17 P3.7 (RD’) Memory Read or 7th GPIO pin of PORT 3 18 XTAL2 External Oscillator Output 19 XTAL1 External Oscillator Input 20 GND Ground pin of MCU 21 P2.0(A8) 0th GPIO pin of PORT 2 22 P2.1 (A9) 1st GPIO pin of PORT 2 23 P2.2 (A10) 2nd GPIO pin of PORT 2 24 P2.3 (A11) 3rd GPIO pin of PORT 2 25 P2.4 (A12) 4th GPIO pin of PORT 2 26 P2.5 (A13) 5th GPIO pin of PORT 2 27 P2.6 (A14) 6th GPIO pin of PORT 2 28 P2.7 (A15) 7th GPIO pin of PORT 2 29 PSEN’ Program store Enable used to read external program memory 30 ALE / PROG’ Address Latch Enable / Program Pulse Input 31 EA’ / VPP External Access Enable / Programming enable Voltage 32 P0.7 (AD7) Address / Data pin 7 or 7th GPIO pin of PORT 0 33 P0.6 (AD6) Address / Data pin 6 or 6th GPIO pin of PORT 0 34 P0.5 (AD5) Address / Data pin 5 or 5th GPIO pin of PORT 0 35 P0.4 (AD4) Address / Data pin 4 or 4th GPIO pin of PORT 0 36 P0.3 (AD3) Address / Data pin 3 or 3rd GPIO pin of PORT 0 37 P0.2 (AD2) Address / Data pin 2 or 2nd GPIO pin of PORT 0 38 P0.1 (AD1) Address / Data pin 1 or 1st GPIO pin of PORT 0 39 P0.0 (AD0) Address / Data pin 0 or 0th GPIO pin of PORT 0 40 VCC Positive pin of MCU (+5V) Applications: Home automation Industrial automation Robotics Automotive Medical devices Communication devices Package Includes: 1 x Atmel 89S52 Specifications:  Programmable (ISP) Flash Memory  8K Bytes Endurance 1000 Write/Erase Cycles Operating Range 4.0V to 5.5V  Fully Static Operation 0 Hz to 33 MHz Internal RAM 256 x 8-bit Programmable I/O Lines 32 Dimensions 40x15x4mm Weight 2g

ATMEL 89C2051 IC The Atmel AT89C2051 IC is a low-voltage, high-performance CMOS 8-bit microcomputer with 2K bytes of Flash programmable and erasable read-only memory (PEROM). The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C2051 is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications. The AT89C2051 provides standard features like 2K 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 AT89C2051 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. Pinout: Pinout Of ATMEL AT89C2051 IC Pinout Applications: Electronic Timers Temperature Control Systems Home Automation Robotics Automotive Applications Package Includes: 1 x ATMEL 89C2051 IC Specifications: Reprogrammable Flash Memory 2K Bytes Endurance 10,000 Write/Erase Cycles Operating Range 2.7V to 6V Fully Static Operation 0Hz to 24MHz Internal RAM 128 x 8-bit Programmable I/O Lines 15

ATmega8 The ATmega8A IC is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega8A achieves throughputs approaching 1 MIPS per MHz, allowing the system designer to optimize power consumption versus processing speed. The ATmega has 16 KB programmable flash memory, static RAM of 1 KB and EEPROM of 512 Bytes. The endurance cycle of flash memory and EEPROM is 10,000 and 100,000, respectively. Pinout: Pinout of ATmega8A Applications: Home automation Industrial automation Robotics Automotive Medical devices Communication devices Also check ATmega32, a high-performance, low-power 8-bit AVR RISC-based microcontroller by Atmel. It features 32KB of programmable flash memory, 2KB SRAM, 1KB EEPROM, an 8-channel 10-bit A/D converter, and a JTAG interface for on-chip debugging. The device supports a throughput of 16 MIPS at 16 MHz and operates between 4.5-5.5 volts. Package Include: 1 x ATmega8 IC Specifications: Package/Case PDIP-28 Minimum Supply Voltage (V) 2.7 Maximum Supply Voltage (V) 5.5 Product Type 8-bit Microcontrollers – MCU Product Series AT89x Maximum Clock Frequency (MHz) 16 Data Bus Width 8 bit Interface Type SPI, TWI, USART Program Memory Size (kB) 8 Data RAM size and Type 1KB SRAM Data ROM Size and Type 512-B EEPROM No. of Timers/Counters 3 Timer Operating Temperature Range (°C) -24 to 84 Dimensions 34.8 x 7.5 x 4.57mm Weight 2g

ATmega16 The ATmega ATmega16 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega16 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. Pinout: Pinout of ATmega16 1 PB0(XCK/T0) Pin 0 of  PORTB T0( Timer0 External Counter Input) XCK ( USART External Clock I/O) 2 PB1(T1) Pin 1 of  PORTB T1(Timer1 External Counter Input) 3 PB2(INT2/AIN0) Pin 2 of  PORTB AIN0(Internal Analog Comparator Positive Input) INT2( External Interrupt 2 Input) 4 PB3(OC0/AIN1) Pin 3 of  PORTB AIN1(Internal Analog Comparator Negative Input)  OC0 (Timer0 Output Compare Match Output) or  PWM output 5 PB4(SS ) Pin 4 of  PORTB SS (SPI Slave Select Input).  This pin is low when controller acts as slave. [Serial Peripheral Interface (SPI) for programming] 6 PB5(MOSI) Pin 5 of  PORTB MOSI (Master Output Slave Input). When controller acts as slave, the data is received by this pin. [Serial Peripheral Interface (SPI) for programming] 7 PB6(MISO) Pin 6 of  PORTB MISO (Master Input Slave Output). When controller acts as slave, the data is sent to master through this pin.  [Serial Peripheral Interface (SPI) for programming] 8 PB7(SCK) Pin 7 of  PORTB SCK (SPI Bus Serial Clock). This is the clock shared between this controller and other system for accurate data transfer. [Serial Peripheral Interface (SPI) for programming] 9 RESET  Reset Pin (Active Low Reset)   10 VCC Connected to +5V   11 GND Connected to GROUND   12 XTAL2 Connected to Crystal Oscillator   13 XTAL1 Connected to Crystal Oscillator   14 PD0(RXD) Pin 0 of  PORTD RXD (USART Input Pin) [USART Serial Communication Interface can be used for programming] 15 PD1(TXD) Pin 1 of  PORTD TXD (USART Output Pin) [USART Serial Communication Interface can be used for programming] 16 PD2(INT0) Pin 2 of  PORTD External Interrupt INT0 17 PD3(INT1) Pin 3 of  PORTD External Interrupt INT1 18 PD4(OC1B) Pin 4 of  PORTD OC1B (Timer Output Compare Match Output) or  PWM output 19 PD5(OC1A) Pin 5 of  PORTD OC1A (Timer Output Compare Match Output) or  PWM output 20 PD6(ICP) Pin 6 of  PORTD Timer/Counter1 Input Capture Pin 21 PD7 (OC2) Pin 7 of  PORTD Timer/Counter2 Output Compare Match Output 22 PC0 (SCL) Pin 0 of  PORTC TWI Interface 23 PC1 (SDA) Pin 1 of  PORTC TWI Interface 24 PC2 (TCK) Pin 2 of  PORTC JTAG Interface 25 PC3 (TMS) Pin 3 of  PORTC JTAG Interface 26 PC4 (TDO) Pin 4 of  PORTC JTAG Interface 27 PC5 (TDI) Pin 5 of  PORTC JTAG Interface 28 PC6 (TOSC1) Pin 6 of  PORTC Timer Oscillator Pin 1 29 PC7 (TOSC2) Pin 7 of  PORTC Timer Oscillator Pin 2 30 AVcc Vcc for Internal ADC  Converter   31 GND GROUND   32 AREF Analog Reference Pin for ADC   33 PA7 (ADC7) Pin 7 of  PORTA ADC (Analog to Digital Converter) Channel 7 34 PA6 (ADC6) Pin 6 of  PORTA ADC (Analog to Digital Converter) Channel 6 35 PA5 (ADC5) Pin 5 of  PORTA ADC (Analog to Digital Converter) Channel 5 36 PA4 (ADC4) Pin 4 of  PORTA ADC (Analog to Digital Converter) Channel 4 37 PA3 (ADC3) Pin 3 of  PORTA ADC (Analog to Digital Converter) Channel 3 38 PA2 (ADC2) Pin 2 of  PORTA ADC (Analog to Digital Converter) Channel 2 39 PA1 (ADC1) Pin 1 of  PORTA ADC (Analog to Digital Converter) Channel 1 40 PA0 (ADC0) Pin 0 of  PORTA ADC (Analog to Digital Converter) Channel 0 Applications: Hobbyists applications Engineers design Temperature control systems Analog signal measuring and manipulations. Embedded systems like coffee machine, vending machine. Motor control systems. Digital signal processing. Peripheral Interface system. Package Includes: 1 x ATmega16 IC Specifications: CPU 8-bit AVR Number of Pins 40 Operating Voltage For ATMEGA16:+4.5 to +5.5 V (+5.5V being absolute maximum) For ATMEGA16L:+2.7 to 5.5V(+5.5V being absolute maximum) Number of Input/output pins 32 Communication Interface JTAG Interface(24,25,26,27 PINS)[Can be used for programming this controller] SPI Serial Interface(5,6,7,8 PINS) [Can be used for programming this controller] Programmable Serial USART(14,15 PINS) [Can be used for programming this controller] Two-wire Serial Interface(22,23 PINS)[Can be used to connect peripheral devices like sensors and servos] ADC Module 8 channels , 10-bit resolution ADC Timer Module Two 8-bit counters, One 16-bit counter [Total three] Analog Comparators 1 DAC Module Nil PWM channels 4 External Oscillator 0-8MHz for ATMEGA16L 0-16MHz for ATMEGA16 Internal Oscillator 0-8MHz  Calibrated Internal Oscillator Program Memory Type Flash Program Memory 16Kbytes[10000 write/erase cycles] CPU Speed 16 MIPS RAM Bytes 1KBytes Data EEPROM 512 Bytes Operating Temperature -55°C to +125°C(+125 being absolute maximum, -55 being absolute minimum) Dimensions 34x7x4mm Weight 2g

ATmega162 The ATmega162 is a low-power CMOS 8-bit microcontroller based on the AVR-enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.The AVR core combines a rich instruction set with 32 general-purpose working registers. All 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers.In order to maximize performance and parallelism, the AVR uses a Harvard architecture – with separate memories and buses for program and data. While one instruction is being executed, the next instruction is pre-fetched from the program memory. Program flow is provided by conditional and unconditional jump and call instructions, able to directly address the whole address space. Most AVR instructions have a single 16-bit word format. Every program memory address contains a 16- or 32-bit instruction. Pinout:   Pinout Of ATmega162 Applications: Industrial Automation Automotive Applications Medical Devices Consumer Electronics Internet of Things (IoT) Package Includes: 1 x ATmega162 IC Specifications: Manufacturer MICROCHIP (ATMEL) Type of integrated circuit AVR microcontroller EEPROM memory capacity 512B SRAM memory capacity 1kB Flash memory capacity 16kB Case DIP40 Clock frequency 16MHz Number of inputs/outputs 35 Number of PWM channels 6 Dimensions 37x5x3mm Weight 2g

ATmega168 The Atmel ATmega168 is a low-power CMOS 8-bit microcontroller based on the AVR-enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega168 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.The AVR core combines a rich instruction set with 32 general-purpose working registers. All 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers. Pinout: Pinout of ATmega168 Applications: Multiple DIY projects. Projects requiring more than logical control for devices. Microcontroller applications for multiple device interface/Control. Package Includes: 1 x ATmega168 IC Specifications: EEPROM 512 Bytes Internal SRAM 1 Kbyte Write/Erase Cycles 10,000 Flash/100,000 EEPROM PWM Channels 4 Data retention 20 years at 85°C/100 years at 25°C(1) Dimensions 13x5x3mm Weight 2g