LM3S6422 Luminary Micro, Inc, LM3S6422 Datasheet - Page 60

• Manufacturer Part Number: LM3S6422
• Description: Lm3s6422 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

System Control
6.1.3
60
The watchdog reset timing is shown in Figure 19-13 on page 448.
Power Control
The Stellaris
power to the majority of the controller's internal logic. The LDO regulator provides software a
mechanism to adjust the regulated value, in small increments (VSTEP), over the range of 2.25 V
to 2.75 V (inclusive)—or 2.5 V ± 10%. The adjustment is made by changing the value of the VADJ
field in the LDO Power Control (LDOPCTL) register. Figure 6-2 on page 61 shows the power
architecture.
Note:
On the printed circuit board, use the LDO output as the source of VDD25 input. In addition,
the LDO requires decoupling capacitors. See “On-Chip Low Drop-Out (LDO) Regulator
Characteristics” on page 437.
®
microcontroller provides an integrated LDO regulator that may be used to provide
Preliminary
July 25, 2008