WARNING:
In case of a target current consumption exceeding 400 mA,
including a short circuit on the target board, ARM-JTAG-EW will
shutdown its power output U
TGPWR
. Some USB hosts and hubs, however,
have faster short-circuit-detectors and will shutdown the power to ARM-
JTAG-EW before it has a chance to react.
Target power can be turned ON and OFF using the C-SPY macro
__jlinkExecCommand() like this:
//Turn power ON
execUserPreload() {
__jlinkExecCommand("SupplyPower = 1");
}
//Turn power OFF
execUserPreload() {
__jlinkExecCommand("SupplyPower = 0");
}
2.4. LED Indication
ARM-JTAG-EW has a single dual color LED. Its states are shown below.
Slow blinking is with a period of 1s, and fast blinking is with a period of
128ms.
LED State
Description
OFF
ARM-JTAG-EW is not connected to USB, or it is
in USB suspended state.
Slow RED blinking
No target connected.
GREEN constantly on
Target connected.
Fast RED blinking
Target error caused by target current
overconsumption or MCU voltage out of
bounds.
GREEN blinking
USB communication is taking place.
Slow blinking sequence
GREEN→RED→OFF
ARM-JTAG-EW is in boot loader mode.
3. Software Installation
Please follow the following procedure exactly in the order it is written:
1. Install the Visual Studio 2008 SP1 Redistributable Package
vcredist_x86.exe
freely
available
from
Microsoft:
2. Install the .NET framework available freely from Microsoft:
