MCF53017CMJ240 Ver la hoja de datos (PDF) - Freescale Semiconductor

Número de pieza

componentes Descripción

Fabricante

MCF53017CMJ240

MCF5301x Data Sheet

Freescale Semiconductor 

Hardware Design Considerations

Board IVDD

10 Ω

10 µF

0.1 µF

PLL VDD Pin

GND

Figure 1. 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 2 should be

connected between the board EVDD and each of the USBVDD pins. The resistor and capacitors should be placed as close to the

dedicated USBVDD pin as possible.

Board EVDD

0Ω

10 µF

0.1 µF

USB VDD Pin

GND

Figure 2. 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.

3.3 Supply Voltage Sequencing

Figure 3 shows situations in sequencing the I/O VDD (EVDD), SDRAM VDD (SDVDD), PLL VDD (PVDD), and internal logic /

core VDD (IVDD). The relationship between SDVDD and EVDD is non-critical during power-up and power-down sequences.

Both SDVDD (2.5V or 1.8V) and EVDD are specified relative to IVDD.

MCF5301x Data Sheet, Rev. 5

6

Preliminary—Subject to Change Without Notice

Freescale Semiconductor

Share Link: