TMS320UC5409 datasheet(12/81 Pages) TI1

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TMS320UC5409

FIXEDPOINT DIGITAL SIGNAL PROCESSOR

SPRS101E − APRIL 1999 − REVISED OCTOBER 2008

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

Terminal Functions (Continued)

TERMINAL

NAME

DESCRIPTION

I/O†

TERMINAL

NAME

DESCRIPTION

I/O†

TEST PINS (CONTINUED)

EMU0

I/O/Z

Emulator 0 pin. When TRST is driven low, EMU0 must be high for activation of the OFF condition. When TRST is

driven high, EMU0 is used as an interrupt to or from the emulator system and is defined as input/output by way of

the IEEE standard 1149.1 scan system.

EMU1/OFF

I/O/Z

Emulator 1 pin/disable all outputs. When TRST is driven high, EMU1/OFF is used as an interrupt to or from the

emulator system and is defined as input/output by way of the IEEE standard 1149.1 scan system. When TRST is

driven low, EMU1/OFF is configured as OFF. The EMU1/OFF signal, when active low, puts all output drivers into the

high-impedance state. Note that OFF is used exclusively for testing and emulation purposes (not for multiprocessing

applications). Therefore, for the OFF feature, the following apply:

TRST = low

EMU0 = high

EMU1/OFF = low

† I = Input, O = Output, Z = High-impedance, S = Supply

‡ Although this pin includes an internal pulldown resistor, a 470-Ω external pulldown is required. If the TRST pin is connected to multiple DSPs,

a buffer is recommended to ensure the VIL and VIH specifications are met.

memory

The UC5409 device provides both on-chip ROM and RAM memories to aid in system performance and

integration.

on-chip ROM with bootloader

The 5409 features a 16K-word

× 16-bit on-chip maskable ROM. Customers can arrange to have the ROM of

the 5409 programmed with contents unique to any particular application. A security option is available to protect

a custom ROM. This security option is described in the TMS320C54x DSP CPU and Peripherals Reference Set,

Volume 1 (literature number SPRU131). Note that only the ROM security option, and not the ROM/RAM option,

is available on the 5409 .

A bootloader is available in the standard 5409 on-chip ROM. This bootloader can be used to automatically

transfer user code from an external source to anywhere in the program memory at power up. If the MP/MC pin

is sampled low during a hardware reset, execution begins at location FF80h of the on-chip ROM. This location

contains a branch instruction to the start of the bootloader program. The standard 5409 bootloader provides

different ways to download the code to accomodate various system requirements:

D Parallel from 8-bit or 16-bit-wide EPROM

D Parallel from I/O space 8-bit or 16-bit mode

D Serial boot from serial ports 8-bit or 16-bit mode

D Host-port interface boot

D SPI serial EEPROM 8-bit boot mode

Not Recommended For New Designs

TMS320UC5409 Datasheet(PDF) 12 Page - Texas Instruments

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