 English |
|
|
|
|
|
|
|
| LM3S1651 Datasheet, PDF (287/1033 Pages) Texas Instruments – ARM and Thumb are registered trademarks and Cortex is a trademark | |||
| |||
| ◁ |
Stellaris® LM3S1651 Microcontroller
Figure 6-2. Using a Crystal as the Hibernation Clock Source
Input
Voltage
Regulator
or Switch
IN
OUT
EN
Stellaris® Microcontroller
VDD
XOSC0
X1
RL
XOSC1
C1
C2
RPU1
Open drain
external wake
up circuit
HIB
WAKE
VBAT
RPU2
GND
3V
Battery
Note:
X1 = Crystal frequency is fXOSC_XTAL.
C1,2 = Capacitor value derived from crystal vendor load capacitance specifications.
RL = Load resistor is RXOSC_LOAD.
RPU1 = Pull-up resistor 1 (value and voltage source (VBAT or Input Voltage) determined by regulator
or switch enable input characteristics).
RPU2 = Pull-up resistor 2 is 200 kΩ
See âHibernation Clock Source Specificationsâ on page 978 for specific parameter values.
Figure 6-3. Using a Dedicated Oscillator as the Hibernation Clock Source with VDD3ON Mode
Input
Voltage
Regulator
Stellaris® Microcontroller
IN OUT
Clock
Source
(fEXT_OSC)
N.C.
VDD
XOSC0
XOSC1
Open drain
external wake
up circuit
HIB
WAKE
VBAT
RPU
GND
3V
Battery
6.3.3
Note: RPU = Pull-up resistor is 1 MΩ
System Implementation
Several different system configurations are possible when using the Hibernation module:
â Using a single battery source, where the battery provides both VDD and VBAT.
January 21, 2012
287
Texas Instruments-Production Data
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese