Thermal printers are gaining popularity due to advantages such as low cost, printing speed, graphic capabilities, print quality, and mobility.

Renesas has developed a serial thermal printer mini interface module to provide a high-quality, cost-effective and space-saving thermal printing solution. The module is developed with the RX111 32-bit high-performance, ultra-low power consumption microcontroller (MCU). The device integrates a USB 2.0 host/function controller, On-the-Go (OTG) communication peripheral, USB Battery Charging Specification 1.2 (BC 1.2) and Android Open Accessory (AoA) support. The RX111 series of 32-bit MCUs is available in a wide range of on-chip memory sizes that make them ideal for thermal printer solutions.

Thermal Printer Block Diagram

Key Features

  • Low power consumption 32-bit microcontrollers
  • Supports BC 1.2 charging from a standard USB port:
    • Standard mobile charger/USB adapter for charging
    • Can charge an Li-ion battery from a power bank
  • Firmware and font upgrade through USB
  • Supports multilingual fonts: 
    • Three language fonts (Hindi, Kannada, English) supported without requiring external memory due to large internal memory
  • Communication Interfaces:
    • USB OTG
    • Serial
    • Bluetooth®
  • Supports AoA and can print through USB OTG
  • High-speed printing
    • 55-60mm/s, text file content, logo, barcode support (Maximum length of 10 values includes alphanumeric characters)


  • Paper and platen detect options with LED indication
  • LED to indicate print process (on Berg)
  • Battery: Li-ion (7.4V, 1100mAH)
  • Supported printers: 2-inch


  • Point-of-Sale (POS)
  • Ticketing terminals
  • Taxi meters
  • Kiosks
  • Labeling
  • Banking
  • Medical devices
  • Instrumentation


Title language Type Format File Size Date
RX111 Group Datasheet Rev.1.30 日本語 Datasheet PDF 1.75 MB
RX Family Brochure 日本語, 简体中文 Brochure PDF 9.01 MB