IAR SYSTEMS I-jet User manual

I-jet-1:1
I-jet®
I-jet®User Guide
for Advanced RISC Machines Ltd's ARM®Cores
I-jet-1

I-jet-1:1
COPYRIGHT NOTICE
© 2012 IAR Systems AB.
No part of this document may be reproduced without the prior written consent of IAR
Systems AB. The software described in this document is furnished under a license and
may only be used or copied in accordance with the terms of such a license.
DISCLAIMER
The information in this document is subject to change without notice and does not
represent a commitment on any part of IAR Systems. While the information contained
herein is assumed to be accurate, IAR Systems assumes no responsibility for any errors
or omissions.
In no event shall IAR Systems, its employees, its contractors, or the authors of this
document be liable for special, direct, indirect, or consequential damage, losses, costs,
charges, claims, demands, claim for lost profits, fees, or expenses of any nature or kind.
TRADEMARKS
IAR Systems, IAR Embedded Workbench, C-SPY, visualSTATE, The Code to Success,
IAR KickStart Kit, I-jet, IAR, and the logotype of IAR Systems are trademarks or
registered trademarks owned by IAR Systems AB.
Microsoft and Windows are registered trademarks of Microsoft Corporation.
Adobe and Acrobat Reader are registered trademarks of Adobe Systems Incorporated.
All other product names are trademarks or registered trademarks of their respective
owners.
EDITION NOTICE
First edition: September 2012
Part number: I-jet-1
Internal reference: IMAE.

I-jet-1:1
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Contents
Introduction .......................................................................................................... 5
The I-jet In-Circuit Debugging Probe .............................................. 5
Requirements ............................................................................................. 6
Supported ARM core families ............................................................. 7
Supported operating systems ............................................................. 7
Connections ................................................................................................ 7
Working with I-jet .............................................................................................. 9
Setup and installation ............................................................................. 9
Software ............................................................................................... 9
Probe setup ........................................................................................... 9
Connecting the target system ............................................................ 9
Power-on sequence .............................................................................. 9
Power up your evaluation board ........................................................ 10
Technical specifications .................................................................................. 11
Model specifications ............................................................................... 11
Version history ......................................................................................... 12
Target interface ...................................................................................... 13
JTAG/SWD - MIPI-20 ....................................................................... 13
JTAG/SWD - MIPI-10 ....................................................................... 15
Indicators .................................................................................................... 16
USB .................................................................................................... 16
JTAG .................................................................................................. 16
TPWR (Target power) ....................................................................... 16
Adapters ..................................................................................................... 17
The ARM-20 adapter ......................................................................... 17
The ADA-MIPI20-TI14 adapter ........................................................ 19
The ADA-MIPI20-cTI20 adapter ...................................................... 23

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I-jet®
User Guide

UCSARM-4:3
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Introduction
This chapter gives a short overview of the I-jet in-circuit debugging probe.
More specifically, this means:
●The I-jet In-Circuit Debugging Probe
●Requirements
●Supported ARM core families
●Supported operating systems
●Connections.
The I-jet In-Circuit Debugging Probe
I-jet is an in-circuit debugging probe, which connects to the target board via a JTAG or
SWD connection, and to the host PC via the USB port. I-jet is also referred to as a debug
probe, debug adapter, or JTAG in-circuit emulator by different tool vendors.
Figure 1: The I-jet in-circuit debugging probe

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Requirements
I-jet®
User Guide
Besides the typical JTAG debugging, I-jet is capable of providing power to the target
board and measuring it with sufficient accuracy to provide a power profile during
program execution in real time. This feature is referred to as power debugging.
Figure 2: Communication overview
For debugging Cortex-M devices, I-jet supports the SWO (Serial Wire Output) feature,
which can be used for tracing the program execution and sending variables at predefined
points in your code. I-jet streams the program counter, variables, and power
measurement data to the host PC to provide a much better view into program execution
in real time.
Requirements
I-jet needs to be controlled by the IAR C-SPY® Debugger which comes with the IAR
Embedded Workbench® IDE.
C-SPY debugger
C-SPY driver
USB connection
I-jet
JTAG/SWD

UCSARM-4:3
Introduction
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Supported ARM core families
These cores are supported:
●ARM7
●ARM9
●ARM11
●Cortex-M
●Cortex-R
●Cortex-A.
Supported operating systems
I-jet can be used on these operating systems:
●Windows 7 (64-bit)
●Windows 7 (32-bit)
●Windows Vista
●Windows XP.
Connections
These interfaces are supported:
●JTAG
●SWD/SWO.
I-jet has a MIPI-20 connector on the front panel. I-jet comes with MIPI-20 and MIPI-10
cables, as well as a legacy ARM-20 adapter.

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Connections
I-jet®
User Guide

UCSARM-4:3
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Working with I-jet
This chapter describes how to work with I-jet. More specifically, this means:
●Setup and installation
●Connecting the target system.
For information about debugging using I-jet, see the C-SPY® Debugging Guide
for ARM.
Setup and installation
SOFTWARE
I-jet requires IAR Embedded Workbench for ARM to be installed.
PROBE SETUP
I-jet does not require any special driver software installation. All drivers for I-jet are part
of the installation of IAR Embedded Workbench for ARM.
If you need to install the driver manually, navigate to
\Program Files\IAR Systems\Embedded Workbench x.x\arm\drivers\jet
\USB\32-bit or 64-bit (depending on your system). Start the dpinst.exe
application. This will install the driver.
For information about using multiple I-jet probes on the same PC, see the C-SPY®
Debugging Guide for ARM.
Connecting the target system
POWER-ON SEQUENCE
When the target power is not provided by I-jet, you do not need to follow any special
powering sequence. Connect I-jet to a powered and running target board and start
debugging.
When hot-plugging, the target GND and the USB host GND must be at the same level.
To prevent damage due to GND differences, make sure that the PC and the target board
power supply are connected to the same wall outlet or a common desktop power strip.

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Connecting the target system
I-jet®
User Guide
POWER UP YOUR EVALUATION BOARD
If you have an evaluation board that is prepared for it, you can power the board via I-jet
through pin 19 on the 20-pin 0.1 in pitch JTAG connector, or pin 11/13 on the small 0.05
in pitch MIPI-20 connector. Target power of up to 400 mA can be supplied from I-jet
with overload protection. Most of the IAR Systems KickStart Kits contain an evaluation
board that can be powered this way.
Note: The target board will get power via I-Jet once you start the compile and
download routine, but not before.

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Technical specifications
This chapter provides technical specifications for the I-jet In-Circuit Debugger.
More specifically, this means:
●Model specifications
●Version history
●Target interface
●Indicators
●Adapters.
Model specifications
These are the specifications of I-jet:
USB speed 480 Mbps (USB 2.0)
USB connection Micro-B
JTAG connection MIPI-20, MIPI-10
Adapters included ARM-20
I-jet debug interface JTAG and SWD
JTAG/SWD maximum clock 32 MHz
SWO protocols supported Manchester and UART
SWO maximum clock speed 60 MHz
Power supplied to target 420 mA max at 4.4 V-5 V
Over-current protection 520 mA (± 1%)
Target power measurement resolution ~160 μA
Target power measurement speed up to 200 ksps (kilo samples per second)
JTAG voltage range (auto-sensing) 1.8 V to 5 V (± 10%)

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Ve rs io n h is to r y
I-jet®
User Guide
I-jet comes with a 20-pin MIPI connector (0.05 in × 0.05 in pitch) on the front panel. It
includes two cables:
●A 6-inch cable with 20-pin MIPI connectors on both ends for the Cortex-M targets
with 20-pin MIPI headers. Pin 7 on each end is keyed with a white plug.
●A 6-inch cable with 20-pin MIPI connectors on one side (to connect to I-jet), and
10-pin MIPI connector on the other side for connection to Cortex-M targets with
10-pin headers. Pin 7 on each end is keyed with a white plug.
Version history
These are the versions of I-jet:
JTAG VTref measurement resolution ~2 mV
Current draw from VTref < 50 μA
Version A The first version.

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Technical specifications
13
Target interface
This section contains descriptions of pinout, signals, and connectors.
JTAG/SWD - MIPI-20
I-jet comes with a 6-inch cable with 20-pin MIPI connectors on both ends for the
Cortex-M targets with 20-pin MIPI headers. Pin 7 on each end is keyed with a white
plug:
Figure 3: The MIPI-20 connector
These are the MIPI-20 pin definitions:
Pin Signal Type Description
1 VTref Input The target reference voltage. Used by I-jet to check
whether the target has power, to create the logic-level
reference for the input comparators, and to control the
output logic levels to the target. It is normally fed from
Vdd of the target board.
2 SWDIO/TMS I/O, output JTAG mode set input of taget CPU. This pin should be
pulled up on the target. Typically connected to TMS of
the target CPU.
4 SWCLK/TCK Output JTAG clock signal to target CPU. It is recommended that
this pin is pulled to a defined state of the target board.
Typically connected to TCK of the target CPU.
Table 1: MIPI-20 pin definitions

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Target interface
I-jet®
User Guide
* Not used.
Pins 3, 5, 9, 15, 17, and 19 are GND pins connected to GND in I-jet. They should also
be connected to GND in the target system.
6 SWO/TDO Input JTAG data output from target CPU. Typically connected
to TDO of the target CPU. When using SWD, this pin is
used as Serial Wire Output trace port. (Optional, but not
required for SWD communication.)
-- -- -- This pin (normally pin 7) does not exist.
8 TDI Output JTAG data input of target CPU. It is recommended that
this pin is pulled to a defined state on the target board.
Typically connected to TDI of the target CPU. For CPUs
which do not provide TDI (SWD-only devices), this pin is
not used. I-jet will ignore the signal on this pin when using
SWD.
10 nRESET I/O Target CPU reset signal. Typically connected to the
RESET pin of the target CPU, which is typically called
nRST, nRESET, or RESET.
11 TgtPwr Output This pin can be used for supplying 5 V power to the
target hardware from I-jet.
12*TRACECLK Input Input trace clock.
13 Tgt Pwr Output This pin can be used for supplying 5 V power to the
target hardware from I-jet.
14*TRACEDATA[0] Input Input Trace data pin 0.
16*TRACEDATA[1] Input Input Trace data pin 1.
18*TRACEDATA[2] Input Input Trace data pin 2.
20*TRACEDATA[3] Input Input Trace data pin 3.
Pin Signal Type Description
Table 1: MIPI-20 pin definitions

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Technical specifications
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JTAG/SWD - MIPI-10
I-jet also comes with a 6-inch cable with a 20-pin MIPI connector on one side (to
connect to I-jet) and a 10-pin MIPI connector on the other side for connection to Cortex
targets with 10-pin headers. Pin 7 on each end is keyed with a white plug:
Figure 4: The MIPI-10 connector
These are the MIPI-10 pin definitions:
Pin Signal Type Description
1 VTref Input The target reference voltage. Used by I-jet to check
whether the target has power, to create the logic-level
reference for the input comparators, and to control the
output logic levels to the target. It is normally fed from Vdd
of the target board.
2 SWDIO/TMS I/O, output JTAG mode set input of target CPU. This pin should be
pulled up on the target. Typically connected to TMS of the
target CPU. When using SWD, this pin is used as Serial
Wire Output trace port. (Optional, not required for SWD
communication)
3 GND GND Connected to logic GND on I-jet.
4 SWCLK/TCK Output JTAG clock signal to target CPU. It is recommended that
this pin is pulled to a defined state of the target board.
Typically connected to TCK of the target CPU.
5 GND GND Connected to logic GND on I-jet.
6 SWO/TDO Input JTAG data output from target CPU. Typically connected to
TDO of the target CPU.
-- -- -- This pin (normally pin 7) does not exist.
Table 2: MIPI-10 pin definitions

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Indicators
I-jet®
User Guide
Indicators
I-jet has three LED indicators on the front. This section describes the indicators and their
statuses.
USB
JTAG
TPWR (TARGET POWER)
8 TDI Output JTAG data input of target CPU. It is recommended that this
pin is pulled to a defined state on the target board. Typically
connected to TDI of the target CPU. For CPUs which do
not provide TDI (SWD-only devices), this pin is not used.
I-jet will ignore the signal on this pin when using SWD.
Pin Signal Type Description
Table 2: MIPI-10 pin definitions
Indicator status Description
Off No USB power.
Green steady Initial state or no transfer.
Green blinking USB transfers to or from I-jet.
Red blinking USB enumeration.
Red steady USB did not enumerate or broken hardware.
Table 3: USB indicator statuses
Indicator status Description
Off vTRef on JTAG header is too low.
Green vTRef is at or above 1.8 V.
Green blinking Indicates JTAG/SWD communication activity.
Table 4: JTAG indicator statuses
Indicator status Description
Off Power to target is not provided by I-jet.
Green Power to target is provided by I-jet.
Yellow Warning. Power to target is above 420 mA.
Table 5: TPWR indicator statuses

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Technical specifications
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Adapters
THE ARM-20 ADAPTER
The ARM-20 adapter is included with I-jet. It converts the MIPI-20 I-jet cable to the
legacy ARM-20 (0.1 in × 0.1 in pitch) JTAG headers. This is a diagram of the adapter:
Figure 5: MIPI-20 to ARM-20 JTAG adapter
Red Error. Overcurrent limit (520 mA) detected and power to target was
switched off for protection.
Indicator status Description
Table 5: TPWR indicator statuses

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Adapters
I-jet®
User Guide
These are the pin definitions of the ARM-20 adapter:
Pin I-jet
direction Name Description
nTRST Output Test Reset Active LOW signal that resets the TAP controller's
state machine.
TCK Output Test Clock TCK synchronizes all JTAG transactions. TCK
connects to all JTAG devices in the scan chain. TCK
flows down the stack of modules and connects to
each JTAG device. However, if there is a device in the
scan chain that synchronizes TCK to some other
clock, then all down-stream devices are connected to
the RTCK signal on that processor.
TMS Output Test Mode Select TMS controls transitions in the tap controller state
machine. TMS connects to all JTAG devices in the
scan chain as the signal flows down the module stack.
TDI Output Test Data Input TDI is the test data input signal that is routed to the
TDI input of the first device in the scan chain.
TDO Input Test Data Output TDO is the return path of the test data input signal
TDI. In a multi-device JTAG chain, the TDO of the
first device connects to the TDI of the next device,
etc. The last device's TDO is connected to the TDO
on the JTAG header.
RTCK Input TCK Return RTCK is a mechanism for returning the sampled
clock to the JTAG equipment, so that the clock is not
advanced until the synchronizing device captured the
data. In adaptive clocking mode, I-jet is required to
detect an edge on RTCK before changing TCK. In a
multi-device JTAG chain, the RTCK output from a
device connects to the TCK input of the
down-stream device.
If there are no synchronizing devices in the scan
chain, it is unnecessary to use the RTCK signal and it
is connected to ground on the target board.
Table 6: ARM-20 pin definitions

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Technical specifications
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The R2 pull-down on pin 17 of the I-jet MIPI20 connector is a signal to the I-jet that a
legacy ARM-20 adapter is being used. Other adapters will have different resistors so that
I-jet can identify them if needed. A solid GND on this pin means no adapter is being
used and the MIPI cable is connected directly between the I-jet and the target board.
ARM-20 header information (for target board)
The ARM-20 header is manufactured by Tyco Electronics. The part number is
103308-5. For more information, see the manufacturer's web page
http://www.te.com/catalog/pn/en/103308-5?RQPN=103308-5.
THE ADA-MIPI20-TI14 ADAPTER
The ADA-MIPI20-TI14 adapter adapts the I-jet standard MIPI-20 cable pinout to the
Texas Instruments 14-pin JTAG interface used on many OMAP, DaVinci, and other
TMS320, TMS470, and TMS570 target boards.
VTref Input Voltage Target
Reference
This is the target reference voltage. It indicates that
the target has power. VTref is normally fed from Vdd
on the target hardware and might have a series
resistor (though this is not recommended).
VTref is used by I-jet to detect if target power is
active and to set JTAG signal voltage reference for
level translators.
nSRST I/O System Reset Active LOW open-collector signal that is driven by
I-jet to reset the device and/or the target board.
I-jet senses this line to determine when you have
reset the device.
Vsupply Output -- This pin is not connected to I-jet.
DBGRQ Output -- This pin is not connected on I-jet.
DBGAC
K/TRGP
WR
Output Target Power This pin is used under SW control to supply 5 V
power to the target board. It should be routed
through a jumper shunt to the 5 V DC board input to
eliminate the power adapter during debugging. The
maximum current supplied by I-jet on this pin is
about 420 mA. When the current supplied reaches
~500 mA, the power will be shut down for
protection.
Pin I-jet
direction Name Description
Table 6: ARM-20 pin definitions

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Adapters
I-jet®
User Guide
The adapter has the MIPI-20 male header on top for connecting the I-jet MIPI-20 cable,
and a TI-14-style female header (socket) on the bottom. The TI-14 JTAG header is a
14-pin, double-row, 0.1 in × 0.1 in (2.54 mm × 2.54 mm) pitch connector with a key
(plug) in position 6 to prevent misconnections. In case the key plug is missing, a white
arrow on pin 1 of the TI-14 connector helps you ensure proper orientation.
Figure 6: The ADA-MIPI20-TI14 adapter
This is a diagram of the adapter:
Figure 7: Diagram of the ADA-MIPI20-TI14 adapter