Texas Instruments TMS320DM355 warranty Power and Sleep Controller PSC, System Control Module

TMS320DM355

Digital Media System-on-Chip (DMSoC)

www.ti.com

SPRS463A –SEPTEMBER 2007 –REVISED SEPTEMBER 2007

3.7 Power and Sleep Controller (PSC)

In the DM355 system, the Power and Sleep Controller (PSC) is responsible for managing transitions of system power on/off, clock on/off, and reset. A block diagram of the PSC is shown in Figure 3-5. Many of the operations of the PSC are transparent to software, such as power-on-reset operations. However, the PSC provides you with an interface to control several important clock and reset operations.

The PSC includes the following features:

∙Manages chip power-on/off, clock on/off, and resets

∙Provides a software interface to:

–Control module clock ON/OFF

–Control module resets

∙Supports IcePick emulation features: power, clock, and reset

For more information on the PSC, see the ARM Subsystem User'sGuide.

Emulation

RESETN

VDD

PLLC

clks

PSC

Interrupt

Always￿on

domain

DMSoC

arm_clock ARM arm_mreset arm_power

AINTC

module_clock MODx module_mreset module_power

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Figure 3-5. DM355 Power and Sleep Controller (PSC)

3.8 System Control Module

The DM355’s system control module is a system-level module containing status and top-level control logic required by the device. The system control module consists of a miscellaneous set of status and control registers, accessible by the ARM and supporting all of the following system features and operations:

∙Device identification

∙Device configuration

–Pin multiplexing control

–Device boot configuration status

∙ARM interrupt and EDMA event multiplexing control

∙Special peripheral status and control

–Timer64+

–USB PHY control

–VPSS clock and video DAC control and status

–DDR VTP control

–Clockout circuitry

–GIO de-bounce control

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