ATTINY28L-4AU Atmel, ATTINY28L-4AU Datasheet - Page 2

• Manufacturer Part Number: ATTINY28L-4AU
• Description: IC MCU AVR 2K FLASH 4MHZ 32-TQFP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY28L-4AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 11
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Processor Series: ATTINY2x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 32 B
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 11
• Number Of Timers: 1
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Package: 32TQFP
• Device Core: AVR
• Family Name: ATtiny
• Maximum Speed: 4 MHz
• Ram Size: 32 Byte
• Operating Supply Voltage: 3.3|5 V
• For Use With: ATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIPATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Ram Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

Description
Block Diagram
2
ATtiny28L/V
The ATtiny28 is a low-power CMOS 8-bit microcontroller based on the AVR RISC archi-
tecture. 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 con-
nected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be
accessed in one single instruction executed in one clock cycle. The resulting architec-
ture is more code efficient while achieving throughputs up to ten times faster than
conventional CISC microcontrollers.
Figure 1. The ATtiny28 Block Diagram
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 inter-
GND
VCC
PROGRAMMING
INSTRUCTION
INSTRUCTION
CONTROL
PROGRAM
COUNTER
PROGRAM
REGISTER
DECODER
LINES
FLASH
LOGIC
DATA REGISTER
PORTB
PORTB
HARDWARE
REGISTERS
REGISTER
GENERAL
PURPOSE
POINTER
STATUS
STACK
STACK
ALU
Z
8-BIT DATA BUS
DATA REGISTER
PORTD
MCU CONTROL
OSCILLATOR
WATCHDOG
INTERRUPT
COUNTER
REGISTER
INTERNAL
TIMER/
TIMER
UNIT
PORTD
XTAL1
REG. PORTD
DATA DIR
OSCILLATOR
TIMING AND
CONTROL
XTAL2
DATA REGISTER
CALIBRATED
OSCILLATOR
PORTA
INTERNAL
MODULATOR
PORTA
HARDWARE
PORTA CONTROL
REGISTER
1062FS–AVR–07/06
RESET