MICROCHIP ATTINY28V-1MU

The ATtiny28 is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny28 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 the 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.

The ATtiny28 provides the following features: 2K bytes of Flash, 11 general-purpose I/O lines, 8 input lines, a high-current LED driver, 32 general-purpose working registers, an 8-bit timer/counter, internal and external interrupts, programmable Watchdog Timer with internal oscillator and 2 software-selectable power-saving modes. The Idle Mode stops the CPU while allowing the timer/counter and interrupt system to continue functioning. The Power-down mode saves the register contents but freezes the oscillator, disabling all other chip functions until the next interrupt or hardware reset. The wake-up or interrupt on low-level input feature enables the ATtiny28 to be highly responsive to external events, still featuring the lowest power consumption while in the power-down modes.

The device is manufactured using Atmel’s high-density, nonvolatile memory technology. By combining an enhanced RISC 8-bit CPU with Flash on a monolithic chip, the Atmel ATtiny28 is a powerful microcontroller that provides a highly flexible and cost-effective solution to many embedded control applications. The ATtiny28 AVR is supported with a full suite of program and system development tools including: macro assemblers, program debugger/simulators, in-circuit emulators and evaluation kits.

• Utilizes the AVR RISC Architecture
• AVR – High-performance and Low-power RISC Architecture
• 90 Powerful Instructions
• Most Single Clock Cycle Execution
• 32 x 8 General-purpose Working Registers
• Up to 4 MIPS Throughput at 4 MHz
• Nonvolatile Program Memory
• 2K Bytes of Flash Program Memory
• Endurance: 1,000 Write/Erase Cycles
• Programming Lock for Flash Program Data Security
• Peripheral Features
• Interrupt and Wake-up on Low-level Input
• One 8-bit Timer/Counter with Separate Prescaler
• On-chip Analog Comparator
• Programmable Watchdog Timer with On-chip Oscillator
• Built-in High-current LED Driver with Programmable Modulation
• Special Microcontroller Features
• Low-power Idle and Power-down Modes
• External and Internal Interrupt Sources
• Power-on Reset Circuit with Programmable Start-up Time
• Internal Calibrated RC Oscillator
• Power Consumption at 1 MHz, 2V, 25℃
• Active: 3.0 mA
• Idle Mode: 1.2 mA
• Power-down Mode: < 1 μA
• I/O and Packages
• 11 Programmable I/O Lines, 8 Input Lines and a High-current LED Driver
• 28-lead PDIP, 32-lead TQFP, and 32-pad MLF
• Operating Voltages
• Vcc: 1.8V - 5.5V for the ATtiny28V
• Vcc: 2.7V - 5.5V for the ATtiny28L
• Speed Grades
• 0 - 1.2 MHz for the ATtiny28V
• 0 - 4 MHz For the ATtiny28L