LUPXA255A0C200 Datasheet, PDF (28/40 Pages) Intel Corporation – Electrical, Mechanical, and Thermal Specification

Electrical Specifications
Table 12. Standard Input, Output, and I/O Pin AC Operating Conditions
Symbol
Description
Min
Typical
Max
CIN
Input capacitance, all standard input and
IO pins
10
Output capacitance, all standard high-
COUT_H
25¹
50¹
strength output and IO pins
tdF_H
Output de-rating, falling edge on all
standard, high-strength output and I/O
pins, from 50pF load.
tdR_H
Output de-rating, rising edge on all
standard, high-strength output and I/O
pins, from 50pF load.
NOTE: ¹AC specifications guaranteed for loads in this range. All testing is done at 50pF
Units
pF
pF
ns/pF
ns/pF
4.6
Oscillator Electrical Specifications
The processor contains two oscillators, each for a specific crystal: a 32.768-kHz oscillator and a
3.6864-MHz oscillator. When choosing a crystal, match the crystal parameters as closely as
possible.
4.6.1
32.768-kHz Oscillator Specifications
The 32.768-kHz oscillator is connected between the TXTAL (amplifier input) and TEXTAL
(amplified output). Table 13, “32.768-kHz Oscillator Specifications” shows the 32.768-kHz
specifications.
Table 13. 32.768-kHz Oscillator Specifications
Symbol
Description
Crystal Specifications - Typical is FOX NC38
F_XT
ESR
Crystal Frequency, TXTAL/TEXTAL
Equivalent series resistance, TXTAL/TEXTAL
P
Drive Level
Amplifier Specifications
VIH_X Input High Voltage, TXTAL
VIL_X Input Low Voltage, TXTAL
IIN_XT Input Leakage, TXTAL
CIN_XT Input Capacitance, TXTAL/TEXTAL
tS_XT Stabilization Time
Board Specifications
RP_XT Parasitic Resistance, TXTAL/TEXTAL to any node
CP_XT Parasitic Capacitance, TXTAL/TEXTAL, total
COP_XT Parasitic Shunt Capacitance, TXTAL to TEXTAL
Min Typical Max Units
—
32.768
—
kHz
6
—
65
kΩ
—
—
1
uW
0.8*VCC
VCC
V
VSS
0.2*VCC V
1
µA
18
25
pF
2
-
10
s
20
MΩ
5
pF
0.4
pF
28
Intel® PXA255 Processor Electrical, Mechanical, and Thermal Specification