ATtiny28L-4AI 반도체 회로 부품 판매점
8-bit AVR Microcontroller with 2K Bytes of Flash
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 ATMEL Corporation |
Features
• 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°C
– 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
Pin Configurations
PDIP
TQFP/MLF
RESET
PD0
PD1
PD2
PD3
PD4
VCC
GND
XTAL1
XTAL2
PD5
PD6
PD7
(AIN0) PB0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 PA0
27 PA1
26 PA3
25 PA2 (IR)
24 PB7
23 PB6
22 GND
21 NC
20 VCC
19 PB5
18 PB4 (INT1)
17 PB3 (INT0)
16 PB2 (T0)
15 PB1 (AIN1)
PD3
PD4
NC
VCC
GND
NC
XTAL1
XTAL2
1
2
3
4
5
6
7
8
24 PB7
23 PB6
22 NC
21 GND
20 NC
19 NC
18 VCC
17 PB5
8-bit
Microcontroller
with 2K Bytes of
Flash
ATtiny28L
ATtiny28V
Rev. 1062E–10/01
1
Description
Block Diagram
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
VCC
GND
PROGRAM
COUNTER
PROGRAM
FLASH
INSTRUCTION
REGISTER
INSTRUCTION
DECODER
XTAL1
XTAL2
8-BIT DATA BUS
INTERNAL
OSCILLATOR
OSCILLATOR
INTERNAL
CALIBRATED
OSCILLATOR
STACK
POINTER
WATCHDOG
TIMER
TIMING AND
CONTROL
HARDWARE
STACK
GENERAL
PURPOSE
REGISTERS
Z
MCU CONTROL
REGISTER
TIMER/
COUNTER
INTERRUPT
UNIT
CONTROL
LINES
PROGRAMMING
LOGIC
ALU
STATUS
REGISTER
HARDWARE
MODULATOR
RESET
DATA REGISTER
PORTB
PORTB
DATA REGISTER
PORTD
DATA DIR
REG. PORTD
DATA REGISTER PORTA CONTROL
PORTA
REGISTER
PORTD
PORTA
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-
2 ATtiny28L/V
1062E–10/01
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PDF 파일 내의 페이지 : 총 70 페이지
제조업체: ATMEL Corporation
( atmel )
ATtiny28L-4AI controller
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