– “OSCCAL – Oscillator Calibration Register” on page 32
– “MCUCR – MCU Control Register” on page 38
– “MCUCR – MCU Control Register” on page 51
– “MCUCR – MCU Control Register” on page 68
– “Speed” on page 187
– “Enhanced Power-On Reset” on page 189
– “ATtiny261A” on page 199
– “Register Summary” on page 277
5. Updated tables:
– “DC Characteristics. TA = -40°C to +85°C, VCC = 1.8V to 5.5V (unless otherwise
noted).” on page 185
– “Additional Current Consumption for the different I/O modules (absolute values).” on
page 197
– “Additional Current Consumption (percentage) in Active and Idle mode.” on page
198
20 ATtiny261A/461A/861A
8197CS–AVR–05/11