TMS320VC5504 datasheet(47/128 Pages) TI

47 / 128 page

CLKSEL =1

InternalConfiguration

SetupPLL to

x375

Start Timer0toCount

200ms

NORBoot

Yes

NANDBoot

Yes

16-bitSPI

EEPROM

Boot

Yes

I2CBoot

Yes

MMC/SD0Boot

(NotSupported)

UART Boot

(NotSupported)

USBBoot

(NotSupported)

SetRegister

Configuration

CopyBoot

ImageSections

toSystem

Memory

Has Timer0

CounterExpired

Yes

JumptoStored

ExecutionPoint

Yes

4.4.1

Boot Modes

4.4.2

Boot Configuration

TMS320VC5504

Fixed-Point Digital Signal Processor

www.ti.com

SPRS609A – JUNE 2009 – REVISED JULY 2009

Figure 4-1. Bootloader Software Architecture

The VC5504 DSP supports the following boot modes in the following device order: NOR Flash, NAND

Flash, 16-bit SPI EEPROM, and I2C EEPROM. The boot mode is determined by checking for a valid boot

signature on each supported boot device. The first boot device with a valid boot signature will be used to

load and execute the user code. If none of the supported boot devices have a valid boot signature, the

Bootloader goes into an endless loop checking the unsupported UART and USB boot modes and the

device must be reset to look for another valid boot image in the supported boot modes.

After reset, the on-chip Bootloader programs the system clock generator based on the input clock selected

via the CLK_SEL pin. If CLK_SEL = 0, the Bootloader programs the system clock generator and sets the

system clock to 12.288 MHz (multiply the 32.768-KHz RTC oscillator clock by 375). If CLK_SEL = 1, the

Bootloader bypasses the system clock generator altogether and the system clock is driven by the CLKIN

pin.

Note:

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Device Configuration

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