I-jet LED status indicators

Technical Note 99069

Targets:
ARM

Component:
Debugger

Updated:
10/9/2012 10:46 AM

Introduction

This Technical Note discusses LED status indicators on an I-jet.

Excerpt from I-jet User Guide for Advanced RISC Machines Ltd's ARM Cores
Part number I-jet-1

USB

Indicator status
Off
Green steady
Green blinking
Red blinking
Red steady

Description
No USB power.
Initial state or no transfer.
USB transfers to or from I-jet.
USB enumeration.
USB did not enumerate or broken hardware.                                                                        

JTAG

Indicator status
Off
Green
Green blinking

Description
vTRef on JTAG header is too low.
vTRef is at or above 1.8 V.
Indicates JTAG/SWD communication activity.                                                                      

TPWR (TARGET POWER)

Indicator status
Off
Green
Yellow
Red

Description
Power to target is not provided by I-jet.
Power to target is provided by I-jet.
Warning. Power to target is above 420 mA.
Error. Overcurrent limit (520 mA) detected and power to target was switched off for protection.

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