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MCF52277 bảng dữ liệu(PDF) 5 Page - Freescale Semiconductor, Inc |
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MCF52277 bảng dữ liệu(HTML) 5 Page - Freescale Semiconductor, Inc |
5 / 46 page Ordering Information MCF5227x ColdFire® Microprocessor Data Sheet, Rev. 6 Preliminary—Subject to Change Without Notice Freescale Semiconductor 5 2 Ordering Information 3 Hardware Design Considerations 3.1 PLL Power Filtering To further enhance noise isolation, an external filter is strongly recommended for PLL analog VDD pins. The filter shown in Figure 2 should be connected between the board VDD and the PLLVDD pins. The resistor and capacitors should be placed as close to the dedicated PLLVDD pin as possible. Figure 2. System PLL VDD Power Filter 3.2 USB Power Filtering To minimize noise, external filters are required for each of the USB power pins. The filter shown in Figure 3 should be connected between the board EVDD and the USBVDD pin. The resistor and capacitors should be placed as close to the dedicated USBVDD pin as possible. Figure 3. USB VDD Power Filter NOTE In addition to the above filter circuitry, a 0.01 F capacitor is also recommended in parallel with those shown. Table 2. Orderable Part Numbers Freescale Part Number Description Package Speed Temperature MCF52274CLU120 MCF52274 RISC Microprocessor 176 LQFP 120 MHz –40 ° to +85° C MCF52277CVM160 MCF52277 RISC Microprocessor 196 MAPBGA 166.67 MHz –40 ° to +85° C Board IVDD 10 Ω 0.1 µF PLL VDD Pin 10 µF GND Board EVDD 0 Ω 0.1 µF USB VDD Pin 10 µF GND |
Số phần tương tự - MCF52277 |
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Mô tả tương tự - MCF52277 |
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