Microcontroller series expands with large embedded RAM to target network, industrial and smart metering applications

February 14, 2013 // By Paul Buckley
Renesas Electronics is extending the company’s 32-bit RX microcontroller (MCU) platform by introducing 120 new models. The move expands the RX631 and RX63N product groups within the RX600 series of 32-bit MCUs.

The new RX63N/RX631 groups, for use in network equipment, are offering up to 256 kB embedded RAM, doubling the today’s available RAM size of 128 kB. Due to the RX platform concept, these new products are pin-to-pin compatible with existing models, and therefore recommended as a drop-in replacement for customers with larger RAM requirements.
 
The new RX63N/RX631 groups achieve high performance of 165 DMIPS at 100 MHz CPU and flash operation. The new products offer a wide and scalable product extension from 1 MB to 2 MB flash integration by keeping 256 kB RAM for all of these product variations. In addition, all these products integrate 32 kB of E2 data flash memory that supports 100,000 rewrite cycles for easy data storage. The package type is LQFP package, allowing Renesas to provide products appropriate for a wide variety of embedded equipment supporting 100-pin to 176-pin.
 
As a new feature, these RX63N/RX631 models integrate an optional Data Encryption Unit (DEU) which enables customers to use encryption/decryption functions according to the AES standard. The encryption engine supports AES (128, 192 and 256-bit key length).
 
The other features are same as existing RX63N/RX631 groups up to three channels of Controller Area Network (CAN) 2.0B compliant interfaces, two Universal Serial Bus (USB) full speed hosts, USB OTG and device features and an Ethernet MAC IEEE 802.3 interface, compliant with Media Independent Interface (MII) and Reduced Media Independent Interface (RMII), for easy connection to a PHY (RX63N only).

The RX63N/RX631 groups of MCUs (without 64 and 48-pin packages) also include an EXDMAC unit that can transfer data over an external bus independently of the internal bus occupation. This allows these MCUs to easily support TFT solutions for up to QVGA or WQVGA class TFT panels, even if there is no dedicated LCD controller used in the application.
 
The new devices include a real-time clock (RTC) that reduces power consumption by offering