ATTINY261-20SU Atmel, ATTINY261-20SU Datasheet - Page 238

• Manufacturer Part Number: ATTINY261-20SU
• Description: IC MCU AVR 2K FLASH 20MHZ 20SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY261-20SU

• 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: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 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: 20-SOIC (7.5mm Width)
• Processor Series: ATTINY2x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: SPI, USI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 55 C
• On-chip Adc: 10 bit, 11 Channel
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRBC100 - REF DESIGN KIT BATTERY CHARGER770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATSTK505 - ADAPTER KIT FOR 14PIN AVR MCU
• 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