GENERAL DESCRIPTION
After power-up, theMxL82201 and MxL82211 provide internal 100k pull-up resistors on each I/O pin. In addition, the GPIOs on the MxL82201 and MxL82211 can individually be controlled and configured. As outputs, the GPIOs can be outputs that are high, low, or in three-state mode. The three-state mode feature is useful for applications where the power is removed from the remote devices, but they can still be connected to the GPIO expander. As inputs, the internal pull-up resistors can be enabled or disabled and the input polarity can be inverted. The interrupt behavior is configurable. It can be set to trigger on a rising edge, falling edge, or both edges. The interrupt condition is cleared either when the input returns to its original state or when the current input state is read. The MxL82201 and MxL82211 are enhanced versions of other 16-bit GPIO expanders with an I2C/SMBus interface. The MxL82201 is pin and software compatible with the PCA9535, TCA9535 and MAX7312. The MxL82211 is pin and software compatible with the CAT9555, PCA9555, TCA9555, MAX7311 and MAX7318.
MaxLinear
