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ATmega88 Datasheet(PDF) 300 Page - ATMEL Corporation |
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ATmega88 Datasheet(HTML) 300 Page - ATMEL Corporation |
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300 / 340 page  300 7530H–AVR–02/09 ATmega48/88/168 Automotive If IOH exceeds the test condition, VOH may exceed the related specification. Pins are not guaranteed to source current greater than the listed test condition. 5. All DC Characteristics contained in this datasheet are based on actual ATmega88 microcontrollers characterization. 6. Values with “Power Reduction Register - PRR” enabled (0xEF). 26.3 External Clock Drive Waveforms Figure 26-1. External Clock Drive Waveforms 26.4 External Clock Drive VIL1 VIH1 Table 26-1. External Clock Drive Symbol Parameter VCC=2.7-5.5V VCC=4.5-5.5V Units Min. Max. Min. Max. 1/tCLCL Oscillator Frequency 0 8 0 16 MHz tCLCL Clock Period 125 62.5 ns tCHCX High Time 50 25 ns tCLCX Low Time 50 25 ns tCLCH Rise Time 1.6 0.5 µs tCHCL Fall Time 1.6 0.5 µs Δt CLCL Change in period from one clock cycle to the next 22 % |
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