Hardware User Manuals

This debug adapter is used to connect the BlueBox to Renesas RL78 based target featuring 14-pin 2.54mm pitch target debug connector with the RL78 pinout.

The debug adapter connects to the 25cm 40-pin ribbon cable coming from the BlueBox and to the target debug connector on the other side. Refer to the BlueBox User Manual for more details on connecting the debug adapter.

The following pinout is valid on the target side:

14-pin RL78 target pinout

Signal Direction is described from the BlueBox perspective.

If the ‘Supply 5V to the target’ option is checked in the ‘Hardware/Emulation Options/CPU Setup/Advanced’ tab, the debugger supplies 5V at the ‘VDD’ pin (pin 8) on the target debug connector, which can be used to power the target. Maximum target current consumption should not exceed 50mA.

Some RL78 devices may have two power supply pins (EVDD and VDD). Both must be connected to the target debug connector, when the power is provided by the BlueBox.

The EVDD voltage from the pin 9 is used as a target reference voltage when ‘Vref’ option under the ‘Debug I/O levels’ setting is checked in the ‘Hardware/Emulation Options/Hardware’ tab.

If ‘RESET IN’ (target reset detection) from the microcontroller is not connected to the target debug connector pin 6, 10k ohm pull-up must be connected to this pin or the debugger may exhibit unpredictable behavior.

The debug adapter connects to the target via a 14-pin 2.54 mm connector, for example Yamaichi FAS-1401-2101-2-OBF. A target should feature a matching part, for example WÜRTH ELEKTRONIK 61201421621.