TMS320VC5421 datasheet(59/104 Pages) TI1

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Functional Overview

December 1999 − Revised October 2008

SPRS098D

Table 3−24. Bit Functions for IMR and IFR Registers for Each DSP Subsystem (Continued)

BIT

NO.

FUNCTION

BIT

VALUE

BIT

NAME

TINT

IFR/IMR: Timer has no interrupt pending/is disabled (masked).

TINT

IFR/IMR: Timer has an interrupt pending/is enabled.

Reserved

INT1

IFR/IMR: Ext user interrupt pin 1 has no interrupt pending/is disabled (masked).

INT1

IFR/IMR: Ext user interrupt pin 1 has an interrupt pending/is enabled.

INT0

IFR/IMR: Ext user interrupt pin 0 has no interrupt pending/is disabled (masked).

INT0

IFR/IMR: Ext user interrupt pin 0 has an interrupt pending/is enabled.

3.14 IDLE3 Power-Down Mode

The IDLE1 and IDLE2 power-down modes operate as described in the TMS320C54x DSP Reference Set,

Volume 1: CPU and Peripherals (literature number SPRU131). The IDLE3 mode is special in that the clocking

circuitry is shut off to conserve power. The 5421 cannot enter an IDLE3 mode unless both subsystems execute

an IDLE3 instruction. The power-reduced benefits of IDLE3 cannot be realized until both subsystems enter

the IDLE3 state and the internal clocks are automatically shut off. The order in which subsystems enter IDLE3

does not matter.

3.15 Emulating the 5421 Device

The 5421 is a single device, but actually consists of two independent subboundary systems that contain

device by modifying the board.cfg file. The board.cfg file is an ASCII file that can be modified with most editors.

This provides the emulator with a description of the JTAG chain. The board.cfg file must identify two

processors when using the 5421. The file contents would look something like this:

“CPU_B” TI320C5xx

“CPU_A” TI320C5xx

Use Code Composer Studio to convert this file into a binary file (board.dat), readable by the emulation tools.

Place the board.dat file in the directory that contains the emulator software.

The subsystems are serially connected together internally. Emulation information is serially transmitted into

the device using the TDI pin. The device responds with serial scan information transmitted out the TDO pin.

TMS320VC5421 Datasheet(PDF) 59 Page - Texas Instruments

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