LM3S6100 Datasheet, PDF (166/559 Pages) Texas Instruments – Stellaris® LM3S6100 Microcontroller

System Control
Figure 5-4. Power Architecture
VDD
VCCPHY
VCCPHY
VCCPHY
VCCPHY
Ethernet
PHY
VDD25
VDD25
VDD25
VDD25
LDO
+3.3V
VDDA
VDDA
Internal
Logic and PLL
Low-noise
LDO
Analog circuits
GNDPHY
GNDPHY
GNDPHY
GNDPHY
GND
GND
GND
GND
GNDA
GNDA
VDD
GND
VDD
GND
VDD
I/O Buffers
GND
VDD
GND
5.2.4
5.2.4.1
Clock Control
System control determines the control of clocks in this part.
Fundamental Clock Sources
There are multiple clock sources for use in the device:
■ Internal Oscillator (IOSC). The internal oscillator is an on-chip clock source. It does not require
the use of any external components. The frequency of the internal oscillator is 12 MHz ± 30%.
166
June 18, 2012
Texas Instruments-Production Data