LM3S6422 Luminary Micro, Inc, LM3S6422 Datasheet - Page 443

• Manufacturer Part Number: LM3S6422
• Description: Lm3s6422 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

19.2.6
July 25, 2008
a. If the internal crystal oscillator is used, select a crystal with the following characteristics.
Figure 19-2. External XTLP Oscillator Characteristics
Table 19-20. External XTLP Oscillator Characteristics
a. IEEE 802.3 frequency tolerance ±50 ppm.
b. IEEE 802.3 frequency tolerance ±50 ppm.
Synchronous Serial Interface (SSI)
Table 19-21. SSI Characteristics
Parameters at 25° C ±2° C; Drive level = 0.5 mW
XTLN Input Low Voltage
Parameter No.
Parameter Name
XTLP Frequency
XTLP Duty Cycle
Rise/Fall Time
Absolute Jitter
XTLP Period
S1
S2
S3
S4
T
r
Motional capacitance (min)
Spurious response (max)
Shunt capacitance (max)
Serious resistance (max)
Drive level (typ)
Parameter
b
t
t
t
clk_high
clk_low
clk_per
a
t
clkrf
Name
T
clkhi
Symbol
XTLN
XTLP
T
XTLP
T
clkper
r
, T
Parameter Name
SSIClk cycle time
SSIClk high time
SSIClk low time
SSIClk rise/fall time
DC
T
f
f
f
ILV
T
Min
40
40
clkper
-
-
-
-
-
Nom
25.0
40
-
-
-
-
Preliminary
T
Max
0.8
4.0
0.1
60
60
clklo
-
-
Unit
> 5 dB below main within 500 kHz
ns
ns
%
-
-
-
Min
2
-
-
-
50-100
Value
10
10
60
Nom
1/2
1/2
7.4
-
65024
Max
26
-
-
system clocks
t clk_per
t clk_per
Unit
ns
LM3S6422 Microcontroller
Condition
µW
pF
fF
Ω
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