SPRUIV7B May 2022 – September 2023 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
I/O power management is useful when the main oscillator is clock gated and the power domains for the peripherals connected to LVCMOS I/Os are OFF (power-gated state) in DeepSleep or MCU-Only. Since the I/Os are controlled by modules in power-gated state, I/O power management is required to have flexibility when interfacing with external devices. During DeepSleep or MCU-Only, the wakeup feature is active, described in Wakeup below. Isolation is required to be activated and deactivated during sleep and wakeup sequencing, respectively (see following description of Isolation).
Three aspects comprise I/O cell power management:
The following terminal signal names are unique and are excluded from the isolation and wakeup daisy chains. Control of these signals can remain with GPIO even when I/O isolation is enabled. Refer to the device datasheet to determine which pins map to each signal name. Each pin has a corresponding GPIO that can be mapped to one of the GPIOs in the GPIO module.
The following terminal signal names are excluded from the isolation and wakeup daisy chains and not muxed with GPIO signals. Hence, these signals cannot be used as a wakeup event.