Power-On Transition To Deep Sleep Mode; Transitions From Deep Sleep Mode; Transition From Deep Sleep To Big Sleep Mode - Texas Instruments OMAP5912 Reference Manual

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Power-on Transition to Deep Sleep Mode

Initiators to Deep Sleep −> Big Sleep Transition

CONF_CAM_CLKMUX_R (register)

CONF_MOD_UART1_CLK_MODE_R (register)

CONF_MOD_UART2_CLK_MODE_R (register)

CONF_MOD_UART3_CLK_MODE_R (register)

CONF_MOD_USB_HOST_HHC_UHOST_EN_R (register)

CONF_MOD_MMC_SD_CLK_REQ_R (register)

At power-up, namely when the power-up input signal PWRON_RESET is

asserted low, the ULPD FSM1 enters deep sleep mode.

In this case, the LOW_PWR signal is reset to inactive state 1.

When PWRON_RESET is released, the FSM automatically switches from

deep sleep to awake.

The transition follows this procedure:

1) PWRON_RESET is asserted low, and LOW_PWR is reset to 1 (inactive).

2) FSM enters the deep sleep mode and stays in this mode until the

PWRON_RESET signal is released.

In deep sleep mode, the FSM monitors the OMAP3.2 wake-up request and

external clock requests. OMAP3.2 propagates asynchronously unmasked

peripheral interrupts to generate a wake-up request.

External clock requests and the OMAP3.2 wake-up request are respectively

initiators of deep sleep to big sleep and deep sleep to awake transitions. The

power-up reset initiates a transition from deep sleep to awake.

Transition to big sleep state occurs when there is at least one specific external

clock request (see Table 2).

Transition from Deep Sleep to Big Sleep

External Clock Request

External Clock Request (Continued)

Ultralow-Power Device

Power Management

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