SA1110 Datasheet, PDF (396/406 Pages) Intel Corporation – Intel StrongARM SA-1110 Microprocessor

3.6864–MHz Oscillator Specifications
B.1.1.1
B.1.1.2
B.1.1.3
B.1.1.4
Note that in some applications, such as a system that includes a socketed SA-1110, it may be
difficult to meet the parasitic capacitances specified. While the 3.6864-MHz oscillator will start
with parasitic capacitances, which are approximately twice the values given, the startup time in this
situation will be about double the specified startup time and the current consumption will increase.
Capacitances larger than twice the specified values may prevent the oscillator from starting.
Parasitic Capacitance Off-chip Between PXTAL and PEXTAL
The parasitic capacitance off-chip between PXTAL and PEXTAL is the board capacitance
between the PXTAL and PEXTAL pins.
Parasitic Capacitance Off-chip Between PXTAL or PEXTAL and VSS
The parasitic capacitance off-chip between PXTAL or PEXTAL and VSS is the parasitic board
capacitance between the PXTAL or PEXTAL pins and the VSS wire surrounding the crystal
connections.
Parasitic Resistance Between PXTAL and PEXTAL
The parasitic resistance between PXTAL and PEXTAL is the parasitic resistance between the
PXTAL and PEXTAL pins due to moisture and other effects.
Parasitic Resistance Between PXTAL or PEXTAL and VSS
The parasitic resistance between PXTAL or PEXTAL and VSS is the parasitic resistance between
the PXTAL or PEXTAL pins to VSS due to moisture and other effects.
The following table describes the system specifications of the oscillator circuit.
Specification
Temperature range
Supply voltage
Ripple voltage on the supply
Current consumption
Startup time
Parasitic capacitance off-chip
between PXTAL and PEXTAL
Parasitic capacitance off-chip
between PXTAL or PEXTAL and
VSS
Parasitic resistance between
PXTAL or PEXTAL to VSS
Parasitic resistance between
PXTAL and PEXTAL
Minimum
0
3
—
—
—
—
—
1
1
Typical
3.3
—
15
15
—
—
—
—
Maximum
100
3.6
0.3
40
150
1
2
—
—
Unit
o_C
V
V
µA
ms
pF
pF
MΩ
MΩ
B-2
SA-1110 Developer’s Manual