TCA9548A_16 Datasheet, PDF (18/36 Pages) Texas Instruments – Low-Voltage 8-Channel I2C Switch with Reset

TCA9548A
SCPS207F – MAY 2012 – REVISED NOVEMBER 2016
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8.5.5 RESET Input
The RESET input is an active-low signal that may be used to recover from a bus-fault condition. When this signal
is asserted low for a minimum of t_WL, the TCA9548A resets its registers and I²C state machine and deselects all
channels. The RESET input must be connected to V_CC through a pull-up resistor.
8.5.6 Power-On Reset
When power (from 0 V) is applied to V_CC, an internal power-on reset holds the TCA9548A in a reset condition
until V_CC has reached V_POR. At that point, the reset condition is released and the TCA9548A registers and I²C
state machine initialize to their default states. After that, V_CC must be lowered to below V_POR and then back up to
the operating voltage for a power-reset cycle.
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