At the time of writing this guide, the IAR C-SPY Debugger for the RL78microcontrollers is available with drivers for these target systems and evaluation boards:
Simulator
E1
E2
E2 Lite (including E2 On-Board)
E20
EZ-CUBE
EZ-CUBE2
TK
COM Port
Note
The E1, E2, E2 Lite/E2 On-Board, E20, EZ-CUBE, EZ-CUBE2, TK, and COM Port emulators use the same C-SPY driver—the OCD driver.