SC2200UFH233F33 AMD (ADVANCED MICRO DEVICES), SC2200UFH233F33 Datasheet - Page 84
SC2200UFH233F33
Manufacturer Part Number
SC2200UFH233F33
Description
Manufacturer
AMD (ADVANCED MICRO DEVICES)
Datasheet
1.SC2200UFH233F33.pdf
(429 pages)
Specifications of SC2200UFH233F33
Operating Temperature (min)
0C
Operating Temperature (max)
85C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / Rohs Status
Compliant
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4.5.1
The internal oscillator employs an external crystal con-
nected to the on-chip amplifier. The on-chip amplifier is
accessible on the X27I input and X27O output signals. See
Figure 4-3 for the recommended external circuit and Table
4-5 for a list of the circuit components.
Choose C
capacitance. The load capacitance C
is comprised of C
parasitic capacitance of the circuit. The parasitic capaci-
tance is caused by the chip package, board layout and
socket (if any), and can vary from 0 to 10 pF. The rule of
thumb in choosing these capacitors is:
Example 1:
Example 2:
1.
88
Component
Crystal
Resistor R
Resistor R
Capacitor C
Capacitor C
C
Crystal C
C
Crystal C
C
The value of these components is recommended. It should be tuned according to crystal and board parameters.
L
1
1
= (C
= 3.6 pF, C
= 24 pF, C
27 MHz Crystal Oscillator
1
1
1
2
and C
1
1
2
* C
L
L
1
1
= 10 pF, C
= 20 pF, C
2
1
) / (C
2
2
2
in series with C
= 24 pF
= 3.6 pF
capacitors to match the crystal’s load
Parameters
Resonance Frequency
Type
Serial Resistance
Shunt Capacitance
Load Capacitance, C
Temperature Coefficient
Resistance
Resistance
Capacitance
Capacitance
1
32580B
+ C
PARASITIC
PARASITIC
2
) + C
Table 4-5. Crystal Oscillator Circuit Components
PARASITIC
2
= 8.2 pF
= 8 pF
and in parallel with the
L
“seen” by crystal Y
L
27.00 MHz Parallel mode
20 MΩ
3-24 pF
3-24 pF
Values
AT-cut or BT-cut
40 Ω
7 pF
10-20 pF
User-defined
100 Ω
Figure 4-3. Recommended Oscillator External
X27I
AMD Geode™ SC2200 Processor Data Book
C
Circuitry
1
R
Y
1
Tolerance
50 PPM or better
Max
Max
5%
5%
5%
5%
General Configuration Block
R
2
C
X27O
2
To other
modules
External
Internal
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