ATTINY461A-MU Atmel, ATTINY461A-MU Datasheet - Page 290

• Manufacturer Part Number: ATTINY461A-MU
• Description: IC MCU AVR 4K FLASH 20MHZ 32QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY461A-MU

• 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): 1.8 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Processor Series: ATTINY4x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 16
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

iv
ATtiny261A/461A/861A
17 Self-Programming the Flash ............................................................... 162
18 Memory Programming ......................................................................... 167
19 Electrical Characteristics .................................................................... 184
20 Typical Characteristics ........................................................................ 193
16.5
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
Limitations of debugWIRE .............................................................................161
Register Description ......................................................................................161
Performing Page Erase by SPM ....................................................................162
Filling the Temporary Buffer (Page Loading) .................................................162
Performing a Page Write ...............................................................................163
Addressing the Flash During Self-Programming ...........................................163
EEPROM Write Prevents Writing to SPMCSR ..............................................164
Reading Fuse and Lock Bits from Software ..................................................164
Preventing Flash Corruption ..........................................................................165
Programming Time for Flash when Using SPM ............................................165
Register Description ......................................................................................166
Program And Data Memory Lock Bits ...........................................................167
Fuse Bytes .....................................................................................................168
Signature Bytes .............................................................................................169
Calibration Byte .............................................................................................169
Page Size ......................................................................................................170
Serial Programming .......................................................................................170
Parallel Programming ....................................................................................174
Absolute Maximum Ratings* .........................................................................184
DC Characteristics .........................................................................................184
Speed Grades ...............................................................................................185
Clock Characteristics .....................................................................................186
System and Reset Characteristics ................................................................187
ADC Characteristics ......................................................................................188
Serial Programming Characteristics ..............................................................189
Parallel Programming Characteristics ...........................................................190
Supply Current of I/O modules ......................................................................193
ATtiny261A ....................................................................................................195
ATtiny461A ....................................................................................................221
ATtiny861A ....................................................................................................247
8197B–AVR–01/10