Externals Clocks; Dynamic Management; Autogating Mechanisms; Omap3.2 Autogating - Texas Instruments OMAP5912 Reference Manual

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Externals Clocks

Table 48. OMAP3.2 Modules With Clock Autogating Enable Feature

Traffic controller (TC)

OCP−T1, OCP−T2

Fill the field RESET_COUNT (bits 11−6) with zeros. The ring oscillators are

Stop the OCP clock in OMAP and the RNG is OFF.

Clocks to external interfaces can be requested on demand. See Chapter 5,

Initialization, for additional information.

Some modules provide internal mechanisms to allow automatic cutting of their

internal clocks when they are not required; in this way, the power is decreased.

With this automatic clock gating, the internal clock can be halted when no

external request is active or when the last task is ended.

These mechanisms can be enabled or disabled by software configuration;

when enabled, the clock gating is completely transparent to the user.

Table 48 lists the OMAP3.2 modules that provide the autogating clock feature

along with the relevant bit register to enable or disable the feature.

SDRAM_CONFIG_2

Table 49 lists the OMAP5912 peripherals that provide the autogating clock

feature along with the relevant bit register to enable or disable the feature.

Power Management User Services

Autogating Enable Bit (Register Field)

Bit 3, CLK_AUTOGATING_ON

Bit 0, AUTO_GATED_CLK

Bit 2, PWD_EN

Bit 2, SD_AUTO_CLK

Power Management

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