| 主权项 |
1. A microcontroller operable in a low-power mode, the microcontroller comprising:
one or more input/output (I/O) connectors; an I/O controller to configure the one or more I/O connectors in accordance with respective user-programmable functions, wherein at least some of the I/O connectors are coupled to the I/O controller, which is operable to provide, as its output, a signal from a selected one of the I/O connectors, wherein the I/O controller is arranged so that it is powered off or deactivated when the microcontroller is in the low-power mode; a backup domain comprising at least the following components that remain powered on when the microcontroller is in the low-power mode:
a multiplexer coupled to the output of the I/O controller, and also coupled to a particular one of the I/O connectors by a connection line that bypasses the I/O controller, wherein the multiplexer is operable to select, in accordance with user-programmable input, either the output of the I/O controller or the connection line from the particular one of the I/O connectors; anda unit to receive a signal passing through the multiplexer based on the selection by the multiplexer, the unit being operable, to take a specified action in response to receiving the signal from the multiplexer. |
