PDG (Ver. 2) does not support multiple interrupts.
Development of PDG was terminated in 2013. Therefore, PDG will not support this capability.
However, you can achieve multiple interrupts by using an interrupt function declared by #pragma interrupt to enable multiple interrupts. For details, see the following manual.
CC-RX Compiler User's Manual
4. COMPILER LANGUAGE SPECIFICATIONS
4.2 Extended Language Specifications
4.2.4 Using Extended Specifications
(3) Interrupt Function Creation
|C/C++ Compiler Package for RX Family|
|Peripheral Driver Generator|