ATTINY461-20SUR Atmel, ATTINY461-20SUR Datasheet - Page 238

• Manufacturer Part Number: ATTINY461-20SUR
• Description: MCU AVR 4KB FLASH 20MHZ 20SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY461-20SUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ii
ATtiny261/461/861
8
9
10 I/O Ports .................................................................................................. 55
11 Timer/Counter0 ...................................................................................... 71
12 Timer/Counter1 ...................................................................................... 89
System Control and Reset .................................................................... 41
Interrupts ................................................................................................ 50
7.2
7.3
7.4
8.1
8.2
8.3
8.4
9.1
9.2
9.3
10.1
10.2
10.3
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
12.1
12.2
12.3
12.4
12.5
12.6
Power Reduction Register ...............................................................................37
Minimizing Power Consumption ......................................................................37
Register Description ........................................................................................39
Reset Sources .................................................................................................42
Internal Voltage Reference ..............................................................................44
Watchdog Timer ..............................................................................................44
Register Description ........................................................................................47
Interrupt Vectors ..............................................................................................50
External Interrupts ...........................................................................................51
Register Description ........................................................................................52
Ports as General Digital I/O .............................................................................56
Alternate Port Functions ..................................................................................60
Register Description ........................................................................................69
Features ..........................................................................................................71
Overview ..........................................................................................................71
Clock Sources .................................................................................................72
Counter Unit ....................................................................................................74
Input Capture Unit ...........................................................................................75
Output Compare Unit .......................................................................................76
Modes of Operation .........................................................................................77
Timer/Counter Timing Diagrams .....................................................................79
Accessing Registers in 16-bit Mode ................................................................80
Register Description ........................................................................................84
Features ..........................................................................................................89
Overview ..........................................................................................................89
Clock Sources .................................................................................................92
Counter Unit ....................................................................................................93
Output Compare Unit .......................................................................................94
Dead Time Generator ......................................................................................96
2588E–AVR–08/10