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SAFC505 Datasheet(PDF) 11 Page - Infineon Technologies AG |
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SAFC505 Datasheet(HTML) 11 Page - Infineon Technologies AG |
11 / 85 page C505L Data Sheet 9 06.99 XTAL2 47 O XTAL2 Output of the inverting oscillator amplifier. XTAL1 48 I XTAL1 Input to the inverting oscillator amplifier and input to the internal clock generator circuits. To drive the device from an external clock source, XTAL1 should be driven, while XTAL2 is left unconnected. To operate above a frequency of 16 MHz, a duty cycle of 50% should be maintained. Minimum and maximum high and low times as well as rise/ fall times specified in the AC characteristics (refer to data Sheet) must be observed. XTAL4 51 O XTAL4 Output of the inverting real-time clock oscillator amplifier. XTAL3 52 I XTAL3 Input to the inverting real-time clock oscillator amplifier. To drive the real-time clock from an external clock source, XTAL3 should be driven, while XTAL4 is left unconnected. Minimum and maximum high and low times as well as rise/ fall times specified in the AC characteristics (refer to Data sheet) must be observed. *) I = Input O = Output Table 1 Pin Definitions and Functions (cont’d) Symbol Pin Number I/O*) Function |
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