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AMC7836IPAPR bảng dữ liệu(PDF) 39 Page - Texas Instruments

tên linh kiện AMC7836IPAPR
Giải thích chi tiết về linh kiện  AMC7836 High-Density, 12-Bit Analog Monitor and Control Solution With Multichannel ADC, Bipolar DACs, Temperature Sensor, and GPIO Ports
PDF  91 Pages
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Trang chủ  https://www.ti.com
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AMC7836IPAPR bảng dữ liệu(HTML) 39 Page - Texas Instruments

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GPIOn
ENABLE
GPIOn Bit
(when reading)
GPIOn Bit
(when writing)
IOVDD
48 k
Ÿ
39
AMC7836
www.ti.com
SLAS986D – NOVEMBER 2014 – REVISED FEBRUARY 2018
Product Folder Links: AMC7836
Submit Documentation Feedback
Copyright © 2014–2018, Texas Instruments Incorporated
7.3.5 General Purpose I/Os
The AMC7836 device includes eight GPIO pins, each with an internal 48-kΩ pullup resistor to the IOVDD pin. The
GPIO[0:3] pins have dual functionality and can be programmed as either bidirectional digital I/O pins or interrupt
signals in the GPIO configuration register (address 0x12). The GPIO[4:7] pins are dedicated GPIOs. Table 4 lists
the dual function of the GPIO[0:3] pins.
Table 4. Dual Functionality GPIO Pins
PIN
DEFAULT PIN NAME
ALTERNATIVE PIN NAME
ALTERNATIVE
FUNCTIONALITY
7
GPIO0
ALARMIN
DAC clear control signal.
8
GPIO1
ALARMOUT
Global alarm output.
9
GPIO2
ADCTRIG
External ADC conversion trigger.
10
GPIO3
DAV
ADC data available indicator.
The GPIOs can receive an input or produce an output. When the GPIOn pin acts as an output, the status of the
pin is determined by the corresponding GPIO bit in the GPIO register (address 0x7A).
To use a GPIOn pin as an input, the corresponding GPIO bit in the GPIO register must be set to 1. When a
GPIOn pin acts as input, the digital value on the pin is acquired by reading the corresponding GPIO bit. After a
power-on reset (POR) or any forced reset, all GPIO bits are set to 1, and the GPIOn pins have a 48-k
Ω input
impedance to the IOVDD pin (see Figure 60). The unused GPIO pins can be left floating.
Figure 60. AMC7836 GPIO Pin



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