TMS320UVC5402GGU datasheet(9/60 Pages) TI

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TMS320UVC5402

FIXED-POINT DIGITAL SIGNAL PROCESSOR

SPRS100A – APRIL 1999 – REVISED AUGUST 1999

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

memory

The ’UVC5402 device provides both on-chip ROM and RAM memories to aid in system performance and

integration.

on-chip ROM with bootloader

The ’UVC5402 features a 4K-word

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

of the ’UVC5402 programmed with contents unique to any particular application.

A bootloader is available in the standard ’UVC5402 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 ’UVC5402 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

The standard on-chip ROM layout is shown in Table 1.

Table 1. Standard On-Chip ROM Layout†

ADDRESS RANGE

DESCRIPTION

F000h – F7FFh

Reserved

F800h – FBFFh

Bootloader

FC00h – FCFFh

µ-law expansion table

FD00h – FDFFh

A-law expansion table

FE00h – FEFFh

Sine look-up table

FF00h – FF7Fh

Reserved

FF80h – FFFFh

Interrupt vector table

† In the ’UVC5402 ROM, 128 words are reserved for factory device-testing purposes. Application

code to be implemented in on-chip ROM must reserve these 128 words at addresses

FF00h–FF7Fh in program space.

on-chip RAM

The ’UVC5402 device contains 16K

× 16-bit of on-chip dual-access RAM (DARAM). The DARAM is composed

of two blocks of 8K words each. Each block in the DARAM can support two reads in one cycle, or a read and

a write in one cycle. The DARAM is located in the address range 0080h–3FFFh in data space, and can be

mapped into program/data space by setting the OVLY bit to one.

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