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AD7147 데이터시트(PDF) 32 Page - Analog Devices

부품명 AD7147
상세설명  CapTouch Programmable Controller
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제조업체  AD [Analog Devices]
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AD7147 데이터시트(HTML) 32 Page - Analog Devices

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Data Sheet
AD7147
Rev. E | Page 31 of 70
GPIO INT OUTPUT CONTROL
The INT output signal can be controlled by the GPIO pin when
the GPIO is configured as an input. The GPIO is con-figured as
an input by setting the GPIO_SETUP bits in the interrupt con-
figuration register to 01. See the General-Purpose Input/Output
(GPIO) section for more information on configuring the GPIO.
Enable the GPIO interrupt by setting the GPIO_INT_ENABLE
bit in Register 0x007 to 1, or disable the GPIO interrupt by
clearing this bit to 0. The GPIO status bit in the conversion-
complete interrupt status register reflects the status of the GPIO
interrupt. This bit is set to 1 when the GPIO has triggered INT.
The bit is cleared upon reading the GPIO_INT_STATUS bit if the
condition that caused the interrupt is no longer present.
The GPIO interrupt can be set to trigger on a rising edge, falling
edge, high level, or low level at the GPIO input pin. Table 15 shows
how the settings of the GPIO_INPUT_CONFIG bits in the inter-
rupt enable (STAGE_LOW_INT_ENABLE) register affect the
behavior of INT.
Figure 43 to Figure 46 show how the interrupt output is cleared
upon a read from the GPIO_INT_STATUS bit.
GPIO
INPUT
INT
OUTPUT
SERIAL
READBACK
GPIO
INPUT
INT
OUTPUT
1
1READ GPIO_INT_STATUS BIT TO RESET INT OUTPUT.
GPIO INPUT HIGH WHEN REGISTER IS READ BACK
GPIO INPUT LOW WHEN REGISTER IS READ BACK
Figure 43. Example of INT Output Controlled by the GPIO Input
(GP IO_SETUP = 01, GPIO_INPUT_CONFIG = 00)
GPIO
INPUT
INT
OUTPUT
SERIAL
READBACK
GPIO
INPUT
INT
OUTPUT
1
1READ GPIO_INT_STATUS BIT TO RESET INT OUTPUT.
GPIO INPUT HIGH WHEN REGISTER IS READ BACK
GPIO INPUT LOW WHEN REGISTER IS READ BACK
Figure 44. Example of INT Output Controlled by the GPIO Input
(GPIO_SETUP = 01, GPIO_INPUT_CONFIG = 01)


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