CANopen protocol stack for Renesas' 32-Bit RX600 MCU series

July 04, 2012 // By Christoph Hammerschmidt
Chipmaker Renesas Electronics Europe and CAN software expert company port GmbH announced the availability of an efficient CANopen protocol stack and an engineering tool (CDT – CANopen Design Tool) for Renesas' high performance 32-bit RX600 series of microcontrollers (MCUs). Renesas ported the widely used and popular CANopen software stack in cooperation with its business partner port GmbH.

With up to 128 KB RAM and up to 2 MB embedded flash , the Renesas RX600 series offers up to three channels of Controller Area Network (CAN) interfaces, which are fully compliant with the CAN 2.0B and the ISO11898-1 (standard and extended frames) standards, and is therefore well-suited to industrial and consumer applications requiring CAN interfaces. 

Each of the embedded CAN modules includes 32 mailboxes, of which eight can also be configured as FIFO mailboxes. A powerful acceptance filter mask provides up to eight different masks to be individually set up for each of four mailboxes, which can be enabled and disabled separately. In addition, a 16-bit counter offers a time stamp function. The CAN modules can interact with Renesas' RX CPU by using different interrupts such as reception complete, transmission complete, receive FIFO, transmit FIFO, and error interrupts.

The RX600 series of MCUs has a maximum operating frequency of 100 MHz. In combination with the enhanced CPU core architecture, it provides an overall processing performance of 165 DMIPS executing code from embedded zero wait state flash. The MCUs also incorporate an on-chip 32-bit multiplier, single-precision floating-point unit (FPU) and a 32-bit enhanced barrel shifter for dramatically improved operation processing performance.

The RX600 series also includes a variety of on-chip peripheral functions, such as high-functionality timers and four DMA controller channels as well as Ethernet MAC and up to two USB units (Host/OTG/Device). Additional features include up to 13 freely scalable SCIs, supporting UART, SIO and I2C communication, 21 channels of 12-bit A/D converter, eight channels of 10-bit A/D converter, two 10-bit D/A converter channels and a CRC calculation circuit to increase reliability.

“As well as its traditional use in automotive companies, the CAN protocol has gained widespread popularity in applications ranging from industrial automation to medical electronics. Renesas' latest MCUs simplify CAN-based designs because the RX600 MCU series ranges from low-end to high-end flash-based CAN controllers,” said Bernd