ATTINY461-20PU Atmel, ATTINY461-20PU Datasheet - Page 237

• Manufacturer Part Number: ATTINY461-20PU
• Description: Microcontrollers (MCU) 4kB Flash 0.256kB EEPROM 16 I/O Pins
• Manufacturer: Atmel

Specifications of ATTINY461-20PU

• Processor Series: ATTINY4x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: 2-Wire/SPI/USI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 2
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 11-ch x 10-bit
• Program Memory Type: Flash
• Program Memory Size: 4 KB
• Package / Case: PDIP-20
• Package: 20PDIP
• Device Core: AVR
• Family Name: ATtiny
• Maximum Speed: 20 MHz
• Ram Size: 256 Byte
• Operating Temperature: -40 to 85 °C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table of Contents
2588E–AVR–08/10
1
2
3
4
5
6
7
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 4
About ......................................................................................................... 6
CPU Core .................................................................................................. 7
Memories ................................................................................................ 15
Clock System ......................................................................................... 24
Power Management and Sleep Modes ................................................. 36
1.1
2.1
3.1
3.2
3.3
3.4
4.1
4.2
4.3
4.4
4.5
4.6
4.7
5.1
5.2
5.3
5.4
5.5
6.1
6.2
6.3
6.4
6.5
7.1
Pin Descriptions .................................................................................................3
Block Diagram ...................................................................................................4
Resources .........................................................................................................6
Code Examples .................................................................................................6
Data Retention ...................................................................................................6
Disclaimer ..........................................................................................................6
Architectural Overview .......................................................................................7
ALU – Arithmetic Logic Unit ...............................................................................8
Status Register ..................................................................................................8
General Purpose Register File ........................................................................10
Stack Pointer ...................................................................................................11
Instruction Execution Timing ...........................................................................11
Reset and Interrupt Handling ...........................................................................12
In-System Re-programmable Flash Program Memory ....................................15
SRAM Data Memory ........................................................................................15
EEPROM Data Memory ..................................................................................16
I/O Memory ......................................................................................................20
Register Description ........................................................................................20
Clock Subsystems ...........................................................................................24
Clock Sources .................................................................................................25
System Clock Prescaler ..................................................................................31
Clock Output Buffer .........................................................................................32
Register Description ........................................................................................32
Sleep Modes ....................................................................................................36
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