AMC7834 Datasheet, PDF (46/93 Pages) Texas Instruments – AMC7834 12-Bit Integrated Power-Amplifier Monitor and Control System with Temperature, Current and Voltage Supervision Capabilities

AMC7834
SLAS972B – NOVEMBER 2014 – REVISED MARCH 2016
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7.3.8 General Purpose I/Os
The AMC7834 device includes four GPIO pins. The GPIO pins can receive an input or produce an output (see
Figure Figure 62). When the GPIOn pin acts as an output, it has an open-drain, and the status of this pin is
determined by the corresponding GPIO bit in the GPIO register (address 0x58). The output state is high
impedance when the GPIOn bit is set to 1, and is logic low when the GPIOn bit is cleared to 0.
NOTE
A 10-kΩ pullup resistor is required when using a GPIO pin as an output. The pullup
voltage must not exceed the AV_DD supply.
To use a GPIO pin as an input, the corresponding GPIO bit in the GPIO register must be set to 1. When a GPIO
pin acts as input, the digital value on the pin is acquired by reading the corresponding GPIO bit. After a power-on
reset or any forced reset, all GPIO bits are set to 1, and the GPIO pins enter a high impedance state.
AVDD
GPIOn Bit
(when writing)
GPIOn Bit
(when reading)
ENABLE
GPIOn
Figure 62. AMC7834 GPIO Pin
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