PXA250 INTEL [Intel Corporation], PXA250 Datasheet - Page 34

• Manufacturer Part Number: PXA250
• Description: Intel-R PXA250 and PXA210 Applications Processors
• Manufacturer: INTEL [Intel Corporation]

PXA250 and PXA210 — Electrical, Mechanical, and Thermal Specification
4.5.2
34
Table 12. 3.6864 MHz Oscillator Specifications
3.6864 MHz Oscillator Specifications
The 3.6864 MHz Oscillator is connected between the PXTAL (amplifier input) and PEXTAL
(amplified output). The 3.6864 MHz specifications are shown in Table 12, “3.6864 MHz Oscillator
Specifications”.
To drive the 3.6864 MHz crystal pins from an external source:
Crystal Specifications - Typical is FOX HC49S
Amplifier Specifications
Board Specifications
•
•
COP_XP
Symbol
CIN_XP
RP_XP
CP_XP
IIN_XP
VIH_X
tS_XP
VIL_X
Drive the PEXTAL pin with a digital signal with a low level near 0 volts and a high level near
VCC. Do not exceed VCC or go below VSS by more than 100 mV. The minimum slew rate is
1 volt / 100 ns. The maximum current sourced by the external clock source when the clock is
at its maximum positive voltage should be approximately 1 mA.
Float the PXTAL pin or drive it complementary to the PXTAL pin, with the same voltage
level, slew rate, and input current restrictions. If floated, some degree of noise susceptibility
will be introduced in the system, and it is therefore not recommended.
LMP
CMP
RMP
COP
FXP
CLP
Crystal Frequency, PXTAL/PEXTAL
Motional Inductance, PXTAL/PEXTAL
Motional Capacitance, PXTAL/PEXTAL
Motional Resistance, PXTAL/PEXTAL
Shunt Capacitance PXTAL to PEXTAL
Load Capacitance PXTAL/PEXTAL
Input High Voltage, PXTAL
Input Low Voltage, PXTAL
Input Leakage, PXTAL
Input Capacitance, PXTAL/PEXTAL
Stabilization Time
Parasitic Resistance, PXTAL/PEXTAL to
any node
Parasitic Capacitance, PXTAL/PEXTAL,
total
Parasitic Shunt Capacitance, PXTAL to
PEXTAL
Description
0.8*VCC
VSS
17.8
Min
50
20
0.50593
3.68488
Typical
3.6864
99.3
1.7
20
40
0.2*VCC
VCC
Max
67.8
200
0.4
10
50
5
Datasheet
Units
MHz
M
ms
pF
pF
pF
pF
pF
fF
W
H
V
V
A