LM3S8971 Luminary Micro, Inc, LM3S8971 Datasheet - Page 478

• Manufacturer Part Number: LM3S8971
• Description: Lm3s8971 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Pulse Width Modulator (PWM)
18.2.3
478
Figure 18-3. PWM Count-Down Mode
CompA
Figure 18-4. PWM Count-Up/Down Mode
CompA
CompB
PWM Signal Generator
The PWM generator takes these pulses (qualified by the direction signal), and generates two PWM
signals. In Count-Down mode, there are four events that can affect the PWM signal: zero, load,
match A down, and match B down. In Count-Up/Down mode, there are six events that can affect
the PWM signal: zero, load, match A down, match A up, match B down, and match B up. The match
CompB
Load
Load
Zero
Zero
Load
Load
Zero
Zero
Dir
Dir
A
B
A
B
BUp
ADown
AUp
BDown
ADown
BDown
Preliminary
July 26, 2008