link to page 9 link to page 9 ATtiny24A/44A2.8Serial Programming CharacteristicsTable 2-8. Serial Programming Characteristics, T = -40°C to +105°C, V = 1.8 - 5.5V A CC (Unless Otherwise Noted) SymbolParameterMinTypMaxUnits 1/tCLCL Oscillator Frequency 0 4 MHz t Oscillator Period 250 ns CLCL 1/tCLCL Oscillator Frequency (VCC = 4.5V - 5.5V) 0 20 MHz tCLCL Oscillator Period (VCC = 4.5V - 5.5V) 50 ns t SCK Pulse Width High 2 t (1) ns SHSL CLCL t (1) SLSH SCK Pulse Width Low 2 tCLCL ns tOVSH MOSI Setup to SCK High tCLCL ns t MOSI Hold after SCK High 2 t ns SHOX CLCL Note: 1. 2 tCLCL for fck < 12 MHz, 3 tCLCL for fck >= 12 MHz 9 8183D-Appendix A–AVR–08/11 Document Outline Appendix A – ATtiny24A/44A Specification at 105°C 1. Memories 1.1 EEPROM Data Memory 2. Electrical Characteristics 2.1 Absolute Maximum Ratings* 2.2 DC Characteristics 2.3 Speed 2.4 Clock Characteristics 2.4.1 Accuracy of Calibrated Internal Oscillator 2.5 System and Reset Characteristics 2.5.1 Power-On Reset 2.6 Analog Comparator Characteristics 2.7 ADC Characteristics 2.8 Serial Programming Characteristics 3. Typical Characteristics 3.1 ATtiny24A 3.1.1 Current Consumption in Active Mode 3.1.2 Current Consumption in Idle Mode 3.1.3 Current Consumption of Standby Supply 3.1.4 Current Consumption in Power-down Mode 3.1.5 Current Consumption of Peripheral Units 3.1.6 Pull-up Resistors 3.1.7 Output Driver Strength 3.1.8 Input Threshold and Hysteresis (for I/O Ports) 3.1.9 BOD and Bandgap 3.1.10 Analog Comparator Offset 3.1.11 Internal Oscillator Speed 3.2 ATtiny44A 3.2.1 Current Consumption in Active Mode 3.2.2 Current Consumption in Idle Mode 3.2.3 Current Consumption of Standby Supply 3.2.4 Current Consumption in Power-down Supply Mode 3.2.5 Current Consumption of Peripheral Units 3.2.6 Pull-up Resistors 3.2.7 Output Driver Strength 3.2.8 Input Threshold and Hysteresis (for I/O Ports) 3.2.9 BOD and Bandgap and Reset 3.2.10 Analog Comparator Offset 3.2.11 Internal Oscillator Speed 4. Ordering Information 4.1 ATtiny24A 4.2 ATtiny44A 5. Revision History