Texas Instruments TMS320DM643x manual Device Identification, Device Configuration

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Overview

9.1Overview

The TMS320DM643x DMP System Module is a system-level module containing status and top-level control logic required by the device. The System Module consists of a set of status and control registers, accessible by the DSP, supporting all of the following system features and operations:

∙Device Identification

∙Device Configuration

–Pin multiplexing control

–Device boot configuration status

∙Power Management

–VDD 3.3 V I/O power-down control

∙Special Peripheral Status and Control

–Timer control

–VPSS clock and DAC control

–DDR2 VTP control

–HPI control

∙Bandwidth Management

–Bus master DMA priority control

–EDMA Transfer Channel configuration

∙Boot Control

This chapter describes the System Module.

9.2Device Identification

The DEVICE_ID register of the System Module contains a software readable version of the JTAG ID device. Software can use this register to determine the version of the device on which it is executing. The register format and description are shown in the device-specific data manual.

9.3Device Configuration

The System Module contains registers for controlling pin multiplexing and registers that reflect the boot configuration status.

9.3.1 Pin Multiplexing Control

The DM643x DMP makes extensive use of pin multiplexing to accommodate the large number of peripheral functions in the smallest possible package. A combination of hardware configuration (configuration pins latched at device reset) and register program control (PINMUX0 and PINMUX1 registers) controls pin multiplexing to accomplish this. Hardware does not attempt to ensure that the proper pin multiplexing is selected for the peripherals or that interface mode is being used.

Detailed information about the pin multiplexing and control is covered in the device-specific data manual.

9.3.2 Device Boot Configuration Status

The device boot and configuration settings are latched at device reset (POR or RESET), and captured in the BOOTCFG register. See the device-specific data manual for details on this register and the boot and configuration settings.

86 System Module SPRU978E–March 2008

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