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TPS658620ZQZT датащи(PDF) 82 Page - Texas Instruments |
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TPS658620ZQZT датащи(HTML) 82 Page - Texas Instruments |
82 / 104 page TPS658620 Advanced Power Management Unit SLVS993 – OCTOBER 2009 www.ti.com Table 3-66. ADC0 GPIO Trigger Settings ADC0_TRIG2 = 1, ADC0_TRIG4 = 0 ADC0_TRIG2 = 0, ADC0_TRIG4 = 1 ADC TRIGGER ADC TRIGGER WHEN GPIO2 PIN WHEN HOLDOFF=HI GPIO4 PIN SOURCE SOURCE HOLDOFF=HI SUSPEND GPIO2 SUSPEND TRIGGER at GPIO4 NON-INVERTED NON-INVERTED TRIGGER at POSITIVE EDGE GPIO2=LO POSITIVE EDGE GPIO4=LO GPIO2 SUSPEND SUSPEND TRIGGER at GPIO4 NEGATIVE INVERTED NEGATIVE INVERTED TRIGGER at GPIO2=HI EDGE EDGE GPIO4=HI ADC0_TRIG2=HI,ADC0_TRIG4=HI GPIO2 PIN GPIO4 PIN ADC TRIGGER SOURCE WHEN HOLDOFF=HI GPIO2 OR GPIO4 POSITIVE SUSPEND TRIGGER at GPIO2 NON-INVERTED NON-INVERTED EDGE = LO AND GPIO4 = LO GPIO2 POSITIVE EDGE OR SUSPEND TRIGGER at GPIO2 NON-INVERTED INVERTED GPIO4 NEGATIVE EDGE = LO AND GPIO4 = HI GPIO2 NEGATIVE EDGE OR SUSPEND TRIGGER at GPIO2 INVERTED NON-INVERTED GPIO4 POSITIVE EDGE = HI AND GPIO4 = LO GPIO2 OR GPIO4 NEGATIVE SUSPEND TRIGGER at GPIO2 INVERTED INVERTED EDGE = HI AND GPIO4 = HI The procedure to start an externally-triggered conversion cycle has the following steps: 1. Verify that the current conversion cycle has ended (ADC0_BUSY is 0, I2C register STAT4) 2. Clear ADC0_EN to 0 (ADC0_SET[7]). 3. Set the appropriate bit in the corresponding ADC0_DELAY register (example – write 1 to ADC0_DELAY bit B7 to use GPIO4 as trigger source for ADC0). Ensure that the selected GPIOs have the appropriate input and polarity selection – see GPIOSET1 and GPIOSET2 registers. 4. Set ADC0_EN to 1 After step 4 the ADC will be armed, waiting for an external trigger detection to start a conversion cycle. In triggered mode the current cycle will not expire if the converter is armed and an external trigger is not detected. DETAILED DESCRIPTION 82 Submit Documentation Feedback |
Аналогичный номер детали - TPS658620ZQZT |
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Аналогичное описание - TPS658620ZQZT |
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