LM3S5656 Datasheet, PDF (1074/1140 Pages) Texas Instruments – Stellaris® LM3S5656 Microcontroller

Electrical Characteristics
24.8.6
24.8.7
24.9
Table 24-14. Supported MOSC Crystal Frequencies (continued)
Crystal Frequency (MHz) Not Using the PLL
Crystal Frequency (MHz) Using the PLL
4.9152 MHz
5 MHz (USB)
5.12 MHz
6 MHz (reset value)(USB)
6.144 MHz
7.3728 MHz
8 MHz (USB)
8.192 MHz
10.0 MHz (USB)
12.0 MHz (USB)
12.288 MHz
13.56 MHz
14.31818 MHz
16.0 MHz (USB)
16.384 MHz
a. Frequencies that may be used with the USB interface are indicated in the table.
System Clock Specification with ADC Operation
Table 24-15. System Clock Characteristics with ADC Operation
Parameter Parameter Name
Min
Nom
Max
Unit
F_sysadc
System clock frequency when the ADC
15.9952
module is operating (when PLL is bypassed).^a
16
16.0048
MHz
a. Clock frequency (plus jitter) must be stable inside specified range. ADC can be clocked from the PLL or directly from an
external clock source, as long as frequency absolute precision is inside specified range.
System Clock Specification with USB Operation
Table 24-16. System Clock Characteristics with USB Operation
Parameter
F_sysusb
Parameter Name
System clock frequency when the USB module is
operating (note that MOSC must be the clock source,
either with or without using the PLL)
Min
Nom
Max
30
-
-
Unit
MHz
Sleep Modes
Table 24-17. Sleep Modes AC Characteristics^a
Parameter
No
D1
D2
Parameter
T_{WAKE_S}
T_{WAKE_DS}
T_{WAKE_PLL_S}
Parameter Name
Min Nom
Time to wake from interrupt in sleep mode, not -
-
using the PLL^b
Time to wake from interrupt deep-sleep mode, -
-
not using the PLL^b
Time to wake from interrupt in sleep or
deep-sleep mode when using the PLL^b
-
-
Max
2
7
T_READY
Unit
system clocks
system clocks
ms
1074
Texas Instruments-Production Data
January 21, 2012