The CDD software is designed to work with Renesas' Winning Combination BMS reference hardware design kit, which includes the ISL78714 IC and the RH850/P1M MCU. The CDD includes configuration and integration of the Microcontroller Abstraction Layer Modules (MCALs) provided by Renesas for the RH850 MCU. It provides a complete low-level software solution for collecting battery cell voltage and temperature measurements and controlling the ISL78714's cell balancing functions. Configurable parameters determine the number of cells in the BMS system and the desired rate of battery cell data collection.

The CDD software features a simple yet comprehensive API that allows end-user application software to receive battery cell measurements in real time. The software interfaces and protocol management required for the operation of the ISL78714 are integrated into the CDD software and operate on top of the existing lower-level SPI, GPIO, and general-purpose timer (GPT) controllers included in the MCAL modules. The CDD software provides customers with a practical architecture to simplify their software design and allows them to focus their efforts on the features of their unique application.

The new ISL78714 CDD software follows the ISO26262 ASIL D development processes (the highest level of functional safety in automotive technology). The RH850/P1M MCU and MCAL modules also achieve ASIL D level. The ISL78714 CDD software, as a template for successful ASIL D software development, is a tremendous asset. Customers seeking design assistance can work under contract with Renesas' partner, TATA Elxsi, to develop their system.

Renesas' new CDD software and BMS reference design hardware kit (ISL78714BMS5XBEKIT1Z) are now available to qualified customers.

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