Datasheet

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TMS320C6472

SPRS612G–JUNE 2009– REVISED JULY 2011

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Table 2-2. C6472 Memory Map Summary (continued)

MEMORY BLOCK DESCRIPTION BLOCK SIZE (BYTES) HEX ADDRESS RANGE

DSP5 L2 SRAM 608K 15800000 - 15897FFF

Reserved 5M + 416K 15898000 - 15DFFFF

DSP5 L1P SRAM 32K 15E00000 - 15E07FFF

Reserved 992K 15E08000 - 15EFFFFF

DSP5 L1D SRAM 32K 15F00000 - 15F07FFF

Reserved 161M + 992K 15F08000 - 1FFFFFFF

DATA SPACE ON DMA

Reserved 1408M 20000000 - 77FFFFFF

DDR2 EMIF Config 128M 78000000 - 7FFFFFFF

Reserved 1536M 80000000 - DFFFFFFF

CE0-CE1 DDR2 SDRAM 512M E0000000 - FFFFFFFF

2.4 Boot Mode Sequence

The boot sequence is a process by which the DSP's internal memory is loaded with program and data

sections and the DSP's internal registers are programmed with predetermined values. The boot sequence

is started automatically after each power-on, warm, and system reset. For more details on the initiators of

these resets, see Section 7.7, Reset Controller.

There are several methods by which the memory and register initialization can take place. Each of these

methods is referred to as a boot mode. The boot mode to be used is selected at reset through the

BOOTMODE[3:0] pins.

2.4.1 Boot Modes Supported

The TMS320C6472 has a dedicated Boot Controller, which is responsible for managing the boot process

for single and multiple C64x+ megamodule core boots. There are two types of resets on the C6472

device:

1. Device-level Resets (Global Resets)

– Power-on Reset; initiated by POR

– Chip-level Warm Reset (or Device Reset); initiated by RESET

– System Reset; initiated by a watchdog timeout or emulation

2. C64x+ megamodule-level Resets (Local Resets)

– External C64x+ megamodule selectable LRESET

– Local reset of the C64x+ megamodule initiated by on-chip Reset Controller

– Power Sleep Controller initiated by local C64x+ megamodule reset

After POR and RESET asserted resets, the boot controller selects the boot mode based on the status of

BOOTMODE[3:0] pins. When a system reset occurs, the boot mode used is determined by the

BOOTMODE field in the DEVSTAT register. All possible bootmodes are listed in Table 2-3. For a detailed

explanation of this operation, see the TMS320C645x/C647x Bootloader User's Guide (literature number

SPRUEC6).

Following a device-level reset, each C64x+ megamodule core can set its boot mode choice for

subsequent local resets using the registers BOOTMODE0 through BOOTMODE5 to either immediate boot

mode or host boot mode. The default values of these registers are set to immediate boot mode.

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