LM3S6950 Luminary Micro, Inc, LM3S6950 Datasheet - Page 532

• Manufacturer Part Number: LM3S6950
• Description: Lm3s6950 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Electrical Characteristics
22.2.6
532
Figure 22-3. External XTLP Oscillator Characteristics
Table 22-21. External XTLP Oscillator Characteristics
a. IEEE 802.3 frequency tolerance ±50 ppm.
b. IEEE 802.3 frequency tolerance ±50 ppm.
Hibernation Module
The Hibernation Module requires special system implementation considerations since it is intended
to power-down all other sections of its host device. The system power-supply distribution and
interfaces to the device must be driven to 0 V
regulator controlled by HIB.
The external voltage regulators controlled by HIB must have a settling time of 250 μs or less.
Table 22-22. Hibernation Module AC Characteristics
XTLN Input Low Voltage
Parameter No
Parameter Name
XTLP Frequency
XTLP Duty Cycle
Rise/Fall Time
Absolute Jitter
XTLP Period
H1
H2
H3
H4
H5
H6
T
r
t
t
HIB_REG_WRITE
t
WAKE_ASSERT
XOSC_SETTLE
Parameter
t
b
WAKETOHIB
t
t
HIB_HIGH
HIB_LOW
a
T
clkhi
Symbol
XTLN
XTLP
T
XTLP
T
clkper
r
, T
DC
T
f
f
f
ILV
Internal 32.768 KHz clock reference rising edge to /HIB asserted
Internal 32.768 KHz clock reference rising edge to /HIB deasserted
/WAKE assertion time
/WAKE assert to /HIB desassert
XOSC settling time
Time for a write to non-volatile registers in HIB module to complete
T
Min
40
40
clkper
-
-
-
-
-
Nom
25.0
40
-
-
-
-
Preliminary
T
Max
0.8
4.0
0.1
60
60
clklo
-
-
a
Unit
ns
ns
%
-
-
-
DC
Parameter Name
or powered down with the same external voltage
Min
62
62
20
92
-
-
Nom
200
July 25, 2008
30
-
-
-
-
Max
124
-
-
-
-
-
Unit
ms
μs
μs
μs
μs
μs