DSP96002UMSLASHAD datasheet(85/111 Pages) NXP

85 / 111 page

Design Considerations

Electrical Design Considerations

MOTOROLA

DSP96002/D, Rev. 2

4-3

ELECTRICAL DESIGN CONSIDERATIONS

Use the following list of recommendations to assure correct DSP operation:

•

Provide a low-impedance path from the board power supply to each VCC

pin on the DSP, and from the board ground to each GND pin.

•

Use at least six 0.01–0.1

µF bypass capacitors positioned as close as

possible to the four sides of the package to connect the VCC power source

to GND.

•

Ensure that capacitor leads and associated printed circuit traces that

connect to the chip VCC and GND pins are less than 0.5” per capacitor

lead.

•

Use at least a four-layer Printed Circuit Board (PCB) with two inner layers

for VCC and GND.

•

Because the DSP output signals have fast rise and fall times, PCB trace

lengths should be minimal. This recommendation particularly applies to

the address and data buses, as well as the IRQA, IRQB, IRQC, TA, TS, BG,

HS, and HA pins. Maximum PCB trace lengths on the order of 6" are

recommended.

•

Consider all device loads, as well as parasitic capacitance due to PCB

traces when calculating capacitance. This is especially critical in systems

with higher capacitive loads that could create higher transient currents in

the VCC and GND circuits.

•

All inputs must be terminated (i.e., not allowed to float) using CMOS

levels.

•

Take special care to minimize noise levels on the VCCPLL and VSSPLL pins.

CAUTION

This device contains protective circuitry to

guard against damage due to high static

voltage or electrical fields. However, normal

precautions are advised to avoid application

of any voltages higher than maximum rated

voltages

this

high-impedance

circuit.

Reliability of operation is enhanced if unused

inputs are tied to an appropriate logic voltage

level (e.g., either GND or VCC).

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

DSP96002UM/AD Datasheet(PDF) 85 Page - NXP Semiconductors

DSP96002UM/AD Datasheet(HTML) 85 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Descarga

Enlace URL