ATTINY25-20SUR Atmel, ATTINY25-20SUR Datasheet - Page 230

• Manufacturer Part Number: ATTINY25-20SUR
• Description: MCU AVR 2KB FLASH 20MHZ 8SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY25-20SUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 6
• 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 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ii
ATtiny25/45/85
8
9
10 I/O Ports .................................................................................................. 55
11 8-bit Timer/Counter0 with PWM ............................................................ 67
12 8-bit Timer/Counter1 .............................................................................. 86
13 8-bit Timer/Counter1 in ATtiny15 Mode ............................................... 98
System Control and Reset .................................................................... 41
Interrupts ................................................................................................ 50
7.2
7.3
7.4
7.5
8.1
8.2
8.3
8.4
8.5
9.1
9.2
9.3
10.1
10.2
10.3
10.4
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
12.1
12.2
12.3
Software BOD Disable .....................................................................................36
Power Reduction Register ...............................................................................37
Minimizing Power Consumption ......................................................................37
Register Description ........................................................................................38
Resetting the AVR ...........................................................................................41
Reset Sources .................................................................................................41
Internal Voltage Reference ..............................................................................44
Watchdog Timer ..............................................................................................44
Register Description ........................................................................................47
Interrupt Vectors in ATtiny25/45/85 .................................................................50
External Interrupts ...........................................................................................51
Register Description ........................................................................................52
Introduction ......................................................................................................55
Ports as General Digital I/O .............................................................................56
Alternate Port Functions ..................................................................................60
Register Description ........................................................................................66
Features ..........................................................................................................67
Overview ..........................................................................................................67
Timer/Counter0 Prescaler and Clock Sources ................................................68
Counter Unit ....................................................................................................70
Output Compare Unit .......................................................................................71
Compare Match Output Unit ............................................................................72
Modes of Operation .........................................................................................74
Timer/Counter Timing Diagrams .....................................................................78
Register Description ........................................................................................80
Timer/Counter1 Prescaler ...............................................................................86
Counter and Compare Units ............................................................................86
Register Description ........................................................................................92
2586M–AVR–07/10