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ATXMEGA8E5 Datasheet(PDF) 87 Page - ATMEL Corporation |
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ATXMEGA8E5 Datasheet(HTML) 87 Page - ATMEL Corporation |
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87 / 147 page  87 XMEGA E5 [DATASHEET] Atmel-8153I–AVR-ATxmega8E5-ATxmega16E5-ATxmega32E5_Datasheet–08/2014 Note: 1. The maximum frequency vs. supply voltage is linear between 1.6V and 2.7V, and the same applies for all other parameters with supply voltage conditions. Table 36-26. External clock with prescaler (1)for system clock. Notes: 1. System Clock Prescalers must be set so that maximum CPU clock frequency for device is not exceeded. 2. The maximum frequency vs. supply voltage is linear between 1.6V and 2.7V, and the same applies for all other parameters with supply voltage conditions. 36.13.7 External 16MHz Crystal Oscillator and XOSC Characteristics Table 36-27. External 16MHz crystal oscillator and XOSC characteristics. tCL Clock Low Time VCC = 1.6 - 1.8V 30.0 ns VCC = 2.7 - 3.6V 12.5 tCR Rise Time (for maximum frequency) VCC = 1.6 - 1.8V 10 ns VCC = 2.7 - 3.6V 3 tCF Fall Time (for maximum frequency) VCC = 1.6 - 1.8V 10 ns VCC = 2.7 - 3.6V 3 Δt CK Change in period from one clock cycle to the next 10 % Symbol Parameter Condition Min. Typ. Max. Units 1/tCK Clock Frequency (2) VCC = 1.6 - 1.8V 0 90 MHz VCC = 2.7 - 3.6V 0 142 tCK Clock Period VCC = 1.6 - 1.8V 11 ns VCC = 2.7 - 3.6V 7 tCH Clock High Time VCC = 1.6 - 1.8V 4.5 ns VCC = 2.7 - 3.6V 2.4 tCL Clock Low Time VCC = 1.6 - 1.8V 4.5 ns VCC = 2.7 - 3.6V 2.4 tCR Rise Time (for maximum frequency) VCC = 1.6 - 1.8V 1.5 ns VCC = 2.7 - 3.6V 1.0 tCF Fall Time (for maximum frequency) VCC = 1.6 - 1.8V 1.5 ns VCC = 2.7 - 3.6V 1.0 Δt CK Change in period from one clock cycle to the next 10 % Symbol Parameter Condition Min. Typ. Max. Units Symbol Parameter Condition Min. Typ. Max. Units Cycle to cycle jitter XOSCPWR=0 FRQRANGE=0 <10 ns FRQRANGE=1, 2, or 3 <1 XOSCPWR=1 <1 |
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