Embedded Software Solutions
J-Link Adapters
The following adapters are available for J-Link:
J-Link JTAG Isolator
The J-Link JTAG Isolator can be connected between J-Link and any ARM-board that uses the standard 20-pin JTAG-ARM connector to provide
electricalisolation. This is essential when the development tools are not connected to the same ground as the application. It is also useful to
protect the developmenttools from electrical spikes that often occur in some applications, such as motor control applications. Another typical
field of application is development ofproducts with sensors or other analog circuitry, in which case the target hardware is protected from
electrical noise originating from the development PC.This product is compatible with J-Link, J-Link Pro and Flasher ARM.
J-Link RX Adapter
The J-Link RX Adapter allows JTAG connections between J-Link and target hardware which comes with the Renesas RX600 series MCUs.The J-
Link RX adapter is able to optionally power the connected target hardware.3.3V or 5V supply voltage can be selected using a Jumper. The target
is supplied via the VTref connection when the supply option is jumpered.
Embedded Software Solutions
J-Link 19-pin Cortex-M Adapter
The J-Link 9-pin Cortex-M Adapter allows JTAG, SWD and SWO connections between J-Link and Cortex-
M based target hardware systems. It adapts from the 20-pin 0.1'' JTAG connector to a 19-pin 0.05''
Samtec FTSH connector as defined by ARM.
The J-Link 19-pin Cortex-M Adapter may also be used to connect J-Link to a non Cortex-M target as far
as the target connector uses the same pinout as shown below.
By default, TRST is not connected, but the Cortex-M Adapter comes with a solder bridge (NR1) which
allows TRST to be connected to pin 9 of the Cortex-M adapter.
J-Link 9-pin Cortex-M Adapter
The J-Link 9-pin Cortex-M Adapter allows JTAG, SWD and SWO connections between J-Link and Cortex-
M based target hardware systems. It adapts from the 20-pin 0.1'' JTAG connector to a 9-pin 0.05''
Samtec FTSH connector as defined by ARM.
The J-Link 9-pin Cortex-M Adapter may also be used to connect J-Link to a non Cortex-M target as far as
the target connector uses the same pinout as shown below.
By default, TRST is not connected, but the Cortex-M Adapter comes with a solder bridge (NR1) which
allows TRST to be connected to pin 9 of the Cortex-M adapter.
Embedded Software Solutions
J-Link ARM 14-pin Adapter
This adapter allows to use J-Link with ARM7/9/11 targets using this 14-pin 0.1" mating JTAG connector
defined by ARM.
The 14-pin connector, though defined by ARM as an alternative to the 20-pin connector is not widely
used on modern eval boards.
J-Link TI 14-pin Adapter
The J-Link TI 14 pin Adapter allows JTAG connections between J-Link and target hardware which use a TI
MCU and provides a 14-pin connector (e.g. the BeagleBoard with an OMAP3530 on it), defined by TI. It
adapts from the 20-pin 0.1'' to a 14-pin 0.1'' JTAG connector.
Embedded Software Solutions
J-Link 5V JTAG Adapter
The 5V JTAG adapter extends the output voltage range of J-Link to 5V. Most targets have JTAG signals at
voltage levels between 1.2V and 3.3V. These targets can be used with J-Link ARM without a 5V adapter.
Higher voltages are common primarily in the automotive sector.
Note: Current J-Links are 5V tolerant, but output levels are limited to about 4V (See J-Link specifications
for more details).
These output levels are sufficient for most 5V targets, meaning that current J-Links can be used with
most 5V targets without adapter. The adapter is only required for 5V targets that require (input) signals
above 3.3V.
Technical data:
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20 pin connector, female (plugs into J-Link)
20 pin connector male, for target ribbon cable
LED shows power status
Adapter is powered by target
Power consumption < 20 mA
Target supply voltage: 3.3V - 5V
Max. JTAG-frequency: 12 MHz
Compatibility Note
The J-Link ARM 5V JTAG adapter is compatible to J-Link ARM revisions 5 or newer.
Usage
The 5V JTAG adapter should be plugged directly into J-Link ARM with the 20 pin female connector. The target ribbon cable is then attached to
the 20 pin male connector of the adapter. The picture below shows a J-Link ARM with a connected 5 volt adapter.
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