LM3S317 Luminary Micro, Inc, LM3S317 Datasheet - Page 150
![no-image](/images/no-image-200.jpg)
LM3S317
Manufacturer Part Number
LM3S317
Description
Lm3s317 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S317.pdf
(376 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM3S317-EQN25-C2
Manufacturer:
Texas Instruments
Quantity:
10 000
Company:
Part Number:
LM3S317-EQN25-C2T
Manufacturer:
Texas Instruments
Quantity:
10 000
Company:
Part Number:
LM3S317-IGZ25-C2
Manufacturer:
TI
Quantity:
168
Company:
Part Number:
LM3S317-IQN25-C2
Manufacturer:
Texas Instruments
Quantity:
135
Company:
Part Number:
LM3S317-IQN25-C2
Manufacturer:
TI
Quantity:
78
Part Number:
LM3S317-IQN25-C2
Manufacturer:
TI/德州仪器
Quantity:
20 000
Company:
Part Number:
LM3S317-IQN25-C2T
Manufacturer:
Texas Instruments
Quantity:
10 000
- Current page: 150 of 376
- Download datasheet (3Mb)
General-Purpose Timers
9.2.3.4
150
Figure 9-3. 16-Bit Input Edge Time Mode Example
16-Bit PWM Mode
The GPTM supports a simple PWM generation mode. In PWM mode, the timer is configured as a
down-counter with a start value (and thus period) defined by GPTMTnILR. PWM mode is enabled
with the GPTMTnMR register by setting the TnAMS bit to 0x1, the TNCMR bit to 0x0, and the TnMR
field to 0x2.
PWM mode can take advantage of the 8-bit prescaler by using the GPTM Timern Prescale
Register (GPTMTnPR) and the GPTM Timern Prescale Match Register (GPTMTnPMR). This
effectively extends the range of the timer to 24 bits.
When software writes the TnEN bit in the GPTMCTL register, the counter begins counting down
until it reaches the 0x0000 state. On the next counter cycle, the counter reloads its start value from
GPTMTnILR (and GPTMTnPR if using a prescaler) and continues counting until disabled by
software clearing the TnEN bit in the GPTMCTL register. No interrupts or status bits are asserted
in PWM mode.
The output PWM signal asserts when the counter is at the value of the GPTMTnILR register (its
start state), and is deasserted when the counter value equals the value in the GPTM Timern
Match Register (GPTMnMATCHR). Software has the capability of inverting the output PWM
signal by setting the TnPWML bit in the GPTMCTL register.
Figure 9-4 shows how to generate an output PWM with a 1-ms period and a 66% duty cycle
assuming a 50-MHz input clock and TnPWML=0 (duty cycle would be 33% for the TnPWML=1
configuration). For this example, the start value is GPTMnIRL=0xC350 and the match value is
GPTMnMR=0x411A.
Input Signal
0xFFFF
Count
Z
Y
X
GPTMTnR=X
Preliminary
GPTMTnR=Y
GPTMTnR=Z
February 6, 2007
Time
Related parts for LM3S317
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![LM3S1110](/images/no-image3.png)
Part Number:
Description:
Lm3s1110 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1133](/images/no-image3.png)
Part Number:
Description:
Lm3s1133 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1138](/images/no-image3.png)
Part Number:
Description:
Lm3s1138 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1150](/images/no-image3.png)
Part Number:
Description:
Lm3s1150 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1162](/images/no-image3.png)
Part Number:
Description:
Lm3s1162 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1165](/images/no-image3.png)
Part Number:
Description:
Lm3s1165 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1332](/images/no-image3.png)
Part Number:
Description:
Lm3s1332 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1435](/images/no-image3.png)
Part Number:
Description:
Lm3s1435 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1439](/images/no-image3.png)
Part Number:
Description:
Lm3s1439 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1512](/images/no-image3.png)
Part Number:
Description:
Lm3s1512 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1538](/images/no-image3.png)
Part Number:
Description:
Lm3s1538 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1601](/images/no-image3.png)
Part Number:
Description:
Lm3s1601 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1607](/images/no-image3.png)
Part Number:
Description:
Lm3s1607 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S1608](/images/no-image3.png)
Part Number:
Description:
Lm3s1608 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet: