Toradex Apalis Series - Page 68

Apalis Carrier Board Design Guide
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The available suspend capabilities depends on the Apalis module. The standard approach for the
carrier board is keep all peripheral supplies up, even in suspend mode. If some of the peripheral
rails need to be switched off in the suspended state, a free GPIO can be used for this purpose.
Ensure that the voltage power-up and power-down sequencing requirements are not violated.
Figure 60: Suspend sequence
Different wake sources are available for different modules. The standard wake source is
WAKE1_MICO#. If peripheral voltage rails are switched off by GPIO signals, make sure that the
ramping up of the voltages follows the requirement.
Figure 61: Resume from suspend sequence
7-27V Carrier Board in
VCC input for Module
Module internal Rails
POWER_ENABLE_MOCI
5V for Perpherals on CB
3.3V for Perpherals on CB
RESET_MOCI#
WAKE1_MICO#
Suspend (RUN -> SUS)
State SUSRUN -> SUSRUN
Module internal Reset
RESET_MICO#
>0ms
Some Peripherals might be
Switched off by a GPIO
Some Peripherals might be
Switched off by a GPIO
7-27V Carrier Board in
VCC input for Module
Module internal Rails
POWER_ENABLE_MOCI
5V for Perpherals on CB
3.3V for Perpherals on CB
RESET_MOCI#
WAKE1_MICO#
Resume from Suspend (SUS -> RUN)
State SUS SUS -> RUN RUN
Module internal Reset
RESET_MICO#
>0ms
Some Peripherals might be
Switched on by a GPIO
Some Peripherals might be
Switched on by a GPIO