LM3S8930 Luminary Micro, Inc, LM3S8930 Datasheet - Page 494
LM3S8930
Manufacturer Part Number
LM3S8930
Description
Lm3s8930 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S8930.pdf
(526 pages)
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Electrical Characteristics
20.2.5
20.2.6
494
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 20-20. Hibernation Module AC Characteristics
a. This parameter is highly sensitive to PCB layout and trace lengths, which may make this parameter time longer. Care
Figure 20-4. Hibernation Module Timing
Synchronous Serial Interface (SSI)
Table 20-21. SSI Characteristics
Parameter No
Parameter No.
32.768 KHz
(internal)
must be taken in PCB design to minimize trace lengths and RLC (resistance, inductance, capacitance).
/WAKE
H1
H2
H3
H4
H5
H6
H7
S1
S2
S3
S4
S5
S6
S7
/HIB
t
t
t
HIB_REG_WRITE
HIB_TO_VDD
Parameter
t
WAKE_ASSERT
XOSC_SETTLE
Parameter
t
WAKETOHIB
t
t
t
t
t
clk_high
HIB_HIGH
clk_low
HIB_LOW
clk_per
t
t
t
t
H1
DMd
DMs
DMh
clkrf
Parameter Name
SSIClk cycle time
SSIClk high time
SSIClk low time
SSIClk rise/fall time
Data from master valid delay time
Data from master setup time
Data from master hold time
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
HIB deassert to VDD and VDD25 at minimum operational level
Preliminary
a
DC
Parameter Name
or powered down with the same external voltage
Min
20
40
2
0
-
-
-
Nom
1/2
1/2
7.4
-
-
-
-
H3
65024
Max
H4
26
20
-
-
-
-
system clocks
t clk_per
t clk_per
H2
Unit
ns
ns
ns
ns
Min
62
62
20
92
-
-
-
Nom
200
July 25, 2008
30
-
-
-
-
-
Max
124
250
-
-
-
-
-
Unit
ms
μs
μs
μs
μs
μs
μs
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