ATTINY461-20SUR Atmel, ATTINY461-20SUR Datasheet - Page 240

• 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

iv
ATtiny261/461/861
17 Self-Programming the Flash ............................................................... 165
18 Memory Programming ......................................................................... 170
19 Electrical Characteristics .................................................................... 187
20 Typical Characteristics ........................................................................ 197
16.6
17.1
17.2
17.3
17.4
17.5
17.6
17.7
17.8
17.9
18.1
18.2
18.3
18.4
18.5
18.6
18.7
19.1
19.2
19.3
19.4
19.5
19.6
19.7
19.8
20.1
20.2
20.3
20.4
20.5
20.6
Register Description ......................................................................................164
Performing Page Erase by SPM ....................................................................165
Filling the Temporary Buffer (Page Loading) .................................................165
Performing a Page Write ...............................................................................166
Addressing the Flash During Self-Programming ...........................................166
EEPROM Write Prevents Writing to SPMCSR ..............................................167
Reading Fuse and Lock Bits from Software ..................................................167
Preventing Flash Corruption ..........................................................................168
Programming Time for Flash when Using SPM ............................................168
Register Description ......................................................................................169
Program And Data Memory Lock Bits ...........................................................170
Fuse Bytes .....................................................................................................171
Signature Bytes .............................................................................................172
Calibration Byte .............................................................................................173
Page Size ......................................................................................................173
Serial Programming .......................................................................................173
Parallel Programming ....................................................................................177
Absolute Maximum Ratings* .........................................................................187
DC Characteristics .........................................................................................187
Speed ............................................................................................................188
Clock Characteristics .....................................................................................189
System and Reset Characteristics ................................................................190
ADC Characteristics ......................................................................................192
Serial Programming Characteristics ..............................................................193
Parallel Programming Characteristics ...........................................................194
Supply Current of I/O modules ......................................................................197
Active Supply Current ....................................................................................198
Idle Supply Current ........................................................................................201
Power-down Supply Current ..........................................................................203
Pin Pull-up .....................................................................................................204
Pin Driver Strength ........................................................................................207
2588E–AVR–08/10