dsp56001 Freescale Semiconductor, Inc, dsp56001 Datasheet - Page 10

• Manufacturer Part Number: dsp56001
• Description: Available In An 88 Pin Ceramic Through-hole Package.
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
10
EXTAL
Note: The midpoint is V
Suggested Component Values
For f
R = 680 K
C = 20 pf + 20%
For f
R = 680 K
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).
C
XTAL
Fundamental Frequency
osc
osc
•
•
Crystal Oscillator
V
= 4 MHz:
= 30 MHz:
ILC
+ 10%
+ 10%
XTAL1
R
DSP56001 Electrical Characteristics
Clock Figure 1. Crystal Oscillator Circuits
Clock Figure 2. External Clock Timing
1
EXTAL
ILC
•
•
+ 0.5 (V
C
3
IHC
Notes:
(1) *3
(2) The suggested crystal source is ICM, # 471163 - 33.00 (33
(3) R2 limits crystal current
(4) Reference Benjamin Parzen, The Design of Crystal and
Other Harmonic Oscillators, John Wiley& Sons, 1983
2
- V
Suggested Component Values
R1 = 470 K + 10%
R2 = 330
C1 = 0.1 f + 20%
C2 = 26 pf + 20%
C3 = 20 pf + 10%
L1 = 2.37 H + 10%
XTAL =33 MHz, AT cut, 20 pf load,
L1
MHz 3
ILC
rd
overtone crystal.
).
EXTAL
5 0 max series resistance
rd
4
C1
overtone, 20 pf load).
+ 10%
Crystal Oscillator
•
•
3
C2
rd
Overtone
XTAL1*
R1
Midpoint
•
•
C3
R2
XTAL
V
IHC
DSP56001