DSP56001 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56001

24-Bit General Purpose Digital Signal Processor

Motorola => Freescale 

DSP56001 Electrical Characteristics

XTAL

•

EXTAL

R

•

•

•

C

C

XTAL1

EXTAL

R1

•

C1

•

L1

C2 XTAL1*

XTAL

R2

•

•

C3

Fundamental Frequency

Crystal Oscillator

Suggested Component Values

For fosc = 4 MHz:

R = 680 KΩ + 10%

C = 20 pf + 20%

For fosc = 30 MHz:

R = 680 KΩ + 10%

C = 20 pf + 20%

Notes:

(1) The suggested crystal source is ICM,

# 433163 - 4.00 (4MHz fundamental, 20

pf load) or # 436163 - 30.00 (30 MHz fun-

damental, 20 pf load).

3rd Overtone

Crystal Oscillator

Suggested Component Values

R1 = 470 KΩ + 10%

R2 = 330 Ω + 10%

C1 = 0.1 µf + 20%

C2 = 26 pf + 20%

C3 = 20 pf + 10%

L1 = 2.37 µH + 10%

XTAL =33 MHz, AT cut, 20 pf load,

5 0Ω max series resistance

Notes:

(1) *3rd overtone crystal.

(2) The suggested crystal source is ICM, # 471163 - 33.00 (33

MHz 3rd overtone, 20 pf load).

(3) R2 limits crystal current

(4) Reference Benjamin Parzen, The Design of Crystal and

Other Harmonic Oscillators, John Wiley& Sons, 1983

Clock Figure 1. Crystal Oscillator Circuits

EXTAL

VILC

1

2

3

4

Midpoint

VIHC

Note: The midpoint is VILC + 0.5 (VIHC - VILC).

Clock Figure 2. External Clock Timing

MOTOROLA

10

DSP56001

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