Renesas MCUs for Bluetooth LE have on-chip antenna matching

July 20, 2015 // By Graham Prophet
Renesas Electronics has introduced the Buetooth Smart RL78/G1D Group of microcontrollers that extend battery life and include on-chip peripheral circuits that simplify antenna circuit design

Renesas’ wireless offering supports the Bluetooth Smart (Low Energy) wireless communication standard, with specific support for short-range/near field links. The RL78/G1D Group of microcontrollers (MCUs) has been developed by combining its low-power RF transceiver technology for Bluetooth Low Energy (BLE), with the company’s expertise on consumer and industrial MCUs, and on-chip peripheral devices necessary for wireless communication. By employing an evaluation kit and Bluetooth-SIG qualified protocol stack, the new MCUs enable system designers to conduct evaluation of wireless characteristics and initial evaluation of communication behaviours. The new MCUs are also provided with a PC GUI tool for easy manipulation of these components. These will enable engineers to develop Bluetooth Smart applications and reduce the time required for development while making effective use of development environment and software resources.

The Bluetooth Smart (BLE) compliant RL78/G1D MCUs have been developed by combining the ultra-low-power RL78 MCU, which has achieved widespread adoption in the consumer and industrial fields, with low-current-consumption Bluetooth low energy transceiver technology.

The current consumption of the RL78/G1D is among the lowest in the industry (3.5 mA during reception and 4.3 mA during transmission), delivering substantially reduced power consumption that is a key consideration for wireless devices. A newly added adaptable RF technology adjusts the power consumption during wireless operation to the optimal level to match the communication distance. This dramatically lowers the power consumption of near field wireless communication, and it is complemented by the on-chip integration of most elements required for the antenna connection, contributing to reduced external component costs.