DSP56156ROM datasheet(73/76 Pages) MOTOROLA

Part #	DSP56156ROM

Description	16-bit Digital Signal Processor

PDF	76 Pages

Scroll/Zoom	100%

Manufacturer	MOTOROLA [Motorola, Inc]

Direct Link	http://www.freescale.com

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73 / 76 page

Design Considerations

DSP56156 Data Sheet

MOTOROLA

Figure 48 Suggested Bottom Layer Routing

The output should be used differentially if at all possible. Analog signal traces should be

shielded by running traces connected to analog ground next to them. Unused board area on

both interconnect levels should be copper filled and connected to analog ground. The copper

fill is only shown on this page for clarity and simplicity. The ADC input anti-aliasing should

be done with respect to VREF.

Figure 49 presents four options for good power supply connections.

0.25

µF

47 k

Ω

47 k

Ω

Copper Fill of unused board space

should be connected to the analog ground plane.

BIAS

AUX

MIC

47 k

Ω

1nF

47 k

Ω

5.6 k

Ω

MIC IN

SPK OUT

Analog I/O Considerations

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

DSP56156ROM Datasheet(PDF) 73 Page - Motorola, Inc