TMS320F datasheet(338/389 Pages) TI

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Designing Your Target System’s Emulator Connector (14-Pin Header)

C-3

Design Considerations for Using the XDS510 Emulator

Table C–1. 14-Pin Header Signal Descriptions

Signal

Description

Emulator†

State

Target†

State

EMU0

Emulation pin 0

I/O

EMU1

Emulation pin 1

I/O

GND

Ground

PD(VCC)

Presence detect. Indicates that the emulation

cable is connected and that the target is

powered up. PD must be tied to VCC in the tar-

get system.

TCK

Test clock. TCK is a 10.368-MHz clock

source from the emulation cable pod. This

signal can be used to drive the system test

clock.

TCK_RET

Test clock return. Test clock input to the emu-

lator. May be a buffered or unbuffered version

of TCK.

TDI

Test data input

TDO

Test data output

TMS

Test mode select

TRST‡

Test reset

† I = input; O = output

‡ Do not use pullup resistors on TRST: it has an internal pulldown device. In a low-noise

environment, TRST can be left floating. In a high-noise environment, an additional pulldown

resistor may be needed. (The size of this resistor should be based on electrical current

considerations.)

TMS320F Datasheet(PDF) 338 Page - Texas Instruments

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