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LM3S6G65-IQC80-A2T

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型号: LM3S6G65-IQC80-A2T
PDF文件:
  • LM3S6G65-IQC80-A2T PDF文件
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功能描述: Stellaris® LM3S6G65 Microcontroller
PDF文件大小: 6152.12 Kbytes
PDF页数: 共1044页
制造商: TI1[Texas Instruments]
制造商LOGO: TI1[Texas Instruments] LOGO
制造商网址: http://www.ti.com
捡单宝LM3S6G65-IQC80-A2T
PDF页面索引
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120%
Figure 12-17. High-Band Operation (CIC=0x3 and/or CTC=0x3)
0
0
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Always
Once
Hysteresis Always
Hysteresis Once
COMP0
COMP1
12.4 Initialization and Configuration
In order for the ADC module to be used, the PLL must be enabled and programmed to a supported
crystal frequency in the RCC register (see page 205). Using unsupported frequencies can cause
faulty operation in the ADC module.
12.4.1 Module Initialization
Initialization of the ADC module is a simple process with very few steps: enabling the clock to the
ADC, disabling the analog isolation circuit associated with all inputs that are to be used, and
reconfiguring the sample sequencer priorities (if needed).
The initialization sequence for the ADC is as follows:
1. Enable the ADC clock by using the RCGC0 register (see page 246).
2. Enable the clock to the appropriate GPIO modules via the RCGC2 register (see page 263). To
find out which GPIO ports to enable, refer to “Signal Description” on page 535.
3. Set the GPIO AFSEL bits for the ADC input pins (see page 430). To determine which GPIOs to
configure, see Table 21-4 on page 941.
4. Configure the AINx and VREFA signals to be analog inputs by clearing the corresponding DEN
bit in the GPIO Digital Enable (GPIODEN) register (see page 441).
5. Disable the analog isolation circuit for all ADC input pins that are to be used by writing a 1 to
the appropriate bits of the GPIOAMSEL register (see page 446) in the associated GPIO block.
July 24, 2012552
Texas Instruments-Production Data
Analog-to-Digital Converter (ADC)
OBSOLETE: TI has discontinued production of this device.
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