Renesas RTCRL7800CB01WNRLT

Overview

RTCRL7800CB01WNRLT from Renesas Electronics is a software license key enabling the CC-RL V1.14.00 compiler to process C++14 source code (ISO/IEC 14882:2014) for RL78 family microcontrollers. It activates the -lang=cpp14 option, supports UTF-8 source encoding, enforces C++14 language rules, and generates RL78-targeted object code with defined data types including int (16-bit), long (32-bit), and float (IEEE 754 single-precision).

For engineers reviewing the RTCRL7800CB01WNRLT datasheet, RTCRL7800CB01WNRLT pinout, RTCRL7800CB01WNRLT application, or RTCRL7800CB01WNRLT equivalent, this license is required to compile C++14 projects targeting RL78 MCUs using the CC-RL toolchain, configure supported compiler options like -signed_char and -dbl_size, and leverage implementation-defined behavior such as __cplusplus macro value 201402L.

Technical Context

The RTCRL7800CB01WNRLT license enables strict C++14 standard compliance within the CC-RL V1.14.00 compiler environment, targeting only the RL78 CPU architecture. It defines fixed data layouts: char is unsigned by default (8-bit), int and short are 16-bit signed types, and double size is configurable via -dbl_size={4|8}.

This license explicitly disables unsupported C++14 features including exception handling, runtime type identification (RTTI), threads, and atomic operations. It mandates UTF-8 source file encoding and implements __STDC__ as 1 while leaving __STDC_VERSION__ undefined, aligning with freestanding C++ implementation requirements for embedded microcontrollers.

Key Specifications

Availability

RTCRL7800CB01WNRLT is available at Aetrix Electronics and suitable for RL78-based firmware development, C++14 migration projects, and embedded toolchain licensing requiring stable component supply, long-term compiler version consistency, and Renesas-authorized tool access.

Supply support for RTCRL7800CB01WNRLT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor manufacturer specializing in microcontrollers, analog devices, power management ICs, and embedded development tools for automotive, industrial, and IoT applications.

The CC-RL compiler product line is designed specifically for Renesas RL78 8/16-bit microcontrollers, providing optimized code generation, low-memory footprint operation, and seamless integration with e2 studio IDE to accelerate resource-constrained embedded C and C++ development.

FAQ

What does the RTCRL7800CB01WNRLT license enable in the CC-RL compiler?

The RTCRL7800CB01WNRLT license activates the -lang=cpp14 option in CC-RL V1.14.00, allowing compilation of C++14 source code targeting RL78 MCUs. It configures the compiler to enforce ISO/IEC 14882:2014 syntax, define __cplusplus as 201402L, and apply RL78-specific data layouts and calling conventions. Without RTCRL7800CB01WNRLT, the CC-RL compiler operates in C-only mode.

Does RTCRL7800CB01WNRLT support C++ exceptions or RTTI?

No, RTCRL7800CB01WNRLT explicitly disables C++ exception handling (try/catch/throw) and runtime type identification (RTTI) as stated in Section 3.1.1 of the manual. These features are unsupported in the CC-RL C++14 implementation due to RL78 memory constraints and real-time determinism requirements. Attempting to use them with RTCRL7800CB01WNRLT will result in compilation errors.

What is the effect of the -signed_char option under RTCRL7800CB01WNRLT?

Under RTCRL7800CB01WNRLT, the -signed_char option changes the default signedness of the char type from unsigned (0 to +255) to signed (-128 to +127), as documented in Table 4. This affects arithmetic operations, comparisons, and array indexing involving char variables. The option has no effect on other integer types and is fully compatible with the C++14 standard as implemented by RTCRL7800CB01WNRLT.

How does RTCRL7800CB01WNRLT handle double precision?

RTCRL7800CB01WNRLT supports configurable double size via the -dbl_size={4|8} option. When set to 4, double is IEEE 754 single-precision (32-bit); when set to 8, it is double-precision (64-bit). Both variants use 2-byte alignment. This flexibility allows developers to balance memory usage and numerical accuracy based on RL78 application requirements, and is a core capability enabled by the RTCRL7800CB01WNRLT license.

Is multithreading supported when using RTCRL7800CB01WNRLT?

No, multithreading is not supported under RTCRL7800CB01WNRLT. Section 3.1.2 explicitly states that multi-threaded execution is not supported in the CC-RL C++14 implementation, and std::thread or related concurrency primitives are unavailable. The RTCRL7800CB01WNRLT license configures the compiler for freestanding, single-threaded embedded execution consistent with RL78 resource limitations and deterministic real-time behavior.