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J-Link RX Adapter

The J-Link RX Adapter maps from the standard J-Link 20-pin 0.1" connector to the standard 14-pin 0.1" connector defined by Renesas and allows JTAG + FINE connections to Renesas RX devices.

When using the J-Link RX Adapter, please make sure that you are using the latest revision of this adapter, since on older revisions specific features like FINE interface support may not be supported. The back-side of the adapter shows the revision of it. The current revision is 5. Older revisions may not show a revision on the back-side but a production date only. Please replace these adapters by a one with min. revision 5.

Supported Cores

The J-Link RX Adapter supports connecting via JTAG to the following cores:

  • RX610
  • RX621
  • RX62G
  • RX62N
  • RX62T
  • RX630
  • RX631
  • RX63N
  • RX63T


It can also be used for connecting via FINE to the following cores:

  • RX111
  • RX210
  • RX21A
  • RX220


Note: For connecting to RX63x devices via FINE, the J-Link RX FINE Adapter is required.

Pinout and Jumper Settings

JTAG Connection

FINE Connection

The FINED Signal

Since the FINE interface is a open-drain specified interface, there is always a pull-up necessary on the target hardware. Pull-up recommendation is 1k Ohm.

CPU Signal <-> J-Link RX Adapter Connection

TDTDI In the following, for the different Renesas RX CPUs the CPU signal <-> J-Link RX Adapter signal mapping is described.

RX111 CPUs

The following table shows the mapping for FINE. This core does not support JTAG.

FINE
CPU signal / pin nameRX Adapter pin / signal name
FINEC / P27Pin 1 (FINEC)
NCPin 4 (EMLE)
MD_FINED (via pull-up) Pin 7 (FINED)
P14 Pin 10 (UB)
RESn Pin 13 (nRES)



RX210 CPUs

The following table shows the mapping for FINE. This core does not support JTAG.

FINE
CPU signal / pin nameRX Adapter pin / signal name
SCK1 / P27Pin 1 (FINEC)
NCPin 4 (EMLE)
MODE / MD_FINED (via pull-up) Pin 7 (FINED)
UB / PC7 Pin 10 (UB)
RESET_N / nRESPin 13 (nRES)



RX220 CPUs

The following table shows the mapping for FINE. This core does not support JTAG.

FINE
CPU signal / pin nameRX Adapter pin / signal name
SCK1 / P27Pin 1 (FINEC)
NCPin 4 (EMLE)
MODE / MD_FINED (via pull-upPin 7 (FINED)
UB / PC7 Pin 10 (UB)
RESET_N / nRES Pin 13 (nRES)



RX630 CPUs

This core supports FINE and JTAG. The following table shows the mapping for JTAG.
To operate the FINE interface of this core please use the J-Link RX FINE Adapter.

JTAG
CPU signal / pin nameRX Adapter pin / signal name
P27 / TCK / FINECPin 1 (TCK)
TRSTnPin 3 (nTRST)
EMLE Pin 4 (EMLE)
TDO Pin 5 (TDO)
MD_FINED (via pull-up)Pin 7 (MD0)
TMS Pin 9 (TMS)
IRQ14 / PC7Pin 10 (UB)
TDIPin 11 (TDI)
RESn Pin 13 (nRES)



RX631 / RX63N CPUs

This core supports FINE and JTAG. The following table shows the mapping for JTAG.
To operate the FINE interface of this core please use the J-Link RX FINE Adapter.

JTAG
CPU signal / pin nameRX Adapter pin / signal name
P27 / TCK / FINECPin 1 (TCK)
TRSTnPin 3 (nTRST)
EMLEPin 4 (EMLE)
TDOPin 5 (TDO)
MD_FINED (via pull-up)Pin 7 (MD0)
TMSPin 9 (TMS)
IRQ14 / PC7Pin 10 (UB)
TDIPin 11 (TDI)
RESnPin 13 (nRES)


RX63T CPUs

This core supports FINE and JTAG. The following table shows the mapping for JTAG.
To operate the FINE interface of this core please use the J-Link RX FINE Adapter.

JTAG
CPU signal / pin nameRX Adapter pin / signal name
P27 / TCK / FINECPin 1 (TCK)
TRSTnPin 3 (nTRST)
EMLEPin 4 (EMLE)
TDOPin 5 (TDO)
MD_FINED (via pull-up)Pin 7 (MD0)
TMSPin 9 (TMS)
IRQ14 / PC7Pin 10 (UB)
TDIPin 11 (TDI)
RESnPin 13 (nRES)

Powering the Target System Via J-Link RX Adapter

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 (pin 8) when the supply option is jumpered. The J-Link RX Adapter is shipped with option "do not power target" (jumper open)

Block diagram

The following functional block diagram illustrates the connections between the debug probe and the target.