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AT91SAM7S64 Datasheet(PDF) 13 Page - ATMEL Corporation |
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AT91SAM7S64 Datasheet(HTML) 13 Page - ATMEL Corporation |
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13 / 50 page  13 6175GS–ATARM–24-Dec-08 AT91SAM7S Series Summary Adequate input supply decoupling is mandatory for VDDIN in order to improve startup stability and reduce source voltage drop. The input decoupling capacitor should be placed close to the chip. For example, two capacitors can be used in parallel: 100 nF NPO and 4.7 µF X7R. 5.4 Typical Powering Schematics The AT91SAM7S Series supports a 3.3V single supply mode. The internal regulator is con- nected to the 3.3V source and its output feeds VDDCORE and the VDDPLL. Figure 5-1 shows the power schematics to be used for USB bus-powered systems. Figure 5-1. 3.3V System Single Power Supply Schematic Power Source ranges from 4.5V (USB) to 18V 3.3V VDDIN Voltage Regulator VDDOUT VDDIO DC/DC Converter VDDCORE VDDFLASH VDDPLL |
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