MSP3410G Micronas, MSP3410G Datasheet - Page 67

• Manufacturer Part Number: MSP3410G
• Description: Multistandard Sound Processor Family
• Manufacturer: Micronas

DATA SHEET
4.6.2.4. Crystal Recommendations
Micronas
Symbol
General Crystal Recommendations
f
R
C
C
Crystal Recommendations for Master-Slave Applications
f
D
C
f
Crystal Recommendations for FM / NICAM Applications
f
D
C
f
Crystal Recommendations for all analog FM/AM Applications
f
D
f
Amplitude Recommendation for Operation with External Clock Input (C
V
1)
Note: To minimize adjustment tolerances for all MSP-generations, it is strongly recommended to use the so-
called MSP-XTAL-REF ICs (available in all packages) for the capacitor adjustment.
P
TOL
CL
TOL
CL
TOL
CL
XCA
R
0
L
TEM
1
TEM
1
TEM
External capacitors at each crystal pin to ground are required. They are necessary to tune the open-loop fre-
quency of the internal PLL and to stabilize the frequency in closed-loop operation. Due to different layouts, the
accurate capacitor value should be determined with the customer PCB. The suggested values (1.5...3.3 pF) are
figures based on experience and should serve as “start value”.
To adjust the capacitor value, reset the MSP. After the reset, no I
the frequency at AUD_CL_OUT-pin. Change the capacitor value until the free running frequency matches
18.432 MHz as closely as possible. The higher the capacity, the lower the resulting clock frequency.
Parameter
Crystal Parallel Resonance Fre-
quency at 12 pF Load Capacitance
Crystal Series Resistance
Crystal Shunt (Parallel) Capacitance
External Load Capacitance
Accuracy of Adjustment
Frequency Variation
versus Temperature
Motional (Dynamic) Capacitance
Required Open Loop Clock
Frequency (T
Accuracy of Adjustment
Frequency Variation
versus Temperature
Motional (Dynamic) Capacitance
Required Open Loop Clock
Frequency (T
Accuracy of Adjustment
Frequency Variation
versus Temperature
Required Open Loop Clock
Frequency (T
External Clock Amplitude
amb
amb
amb
= 25 C)
= 25 C)
= 25 C)
1)
May 27, 2003; 6251-476-1DS
Pin Name
XTAL_IN,
XTAL_OUT
AUD_CL_OUT
AUD_CL_OUT
AUD_CL_OUT
XTAL_IN
(No MSP-clock synchronization to I
(MSP-clock must perform synchronization to I
(No MSP-clock synchronization to I
2
C telegrams should be transmitted. Measure
Min.
PSDIP
PMQFP approx. 3.3
19
18.431
15
18.4305
18.429
0.7
20
20
30
30
100
50
load
after reset typ. 22 pF)
Typ.
18.432
8
6.2
approx. 1.5
24
MSP 34x0G
2
S clock possible)
Max.
25
18.433
18.4335
18.435
7.0
20
20
30
30
100
50
2
S clock possible)
2
S clock)
Unit
MHz
pF
pF
pF
ppm
ppm
fF
MHz
ppm
ppm
fF
MHz
ppm
ppm
MHz
V
pp
67