NEC 78K0R All Flash Microcontrollers

NEC Electronics introduced 12 new 16-bit All Flash microcontrollers (MCUs). The new MCUs consist of six 80-pin 78K0R/LF3, three 100-pin 78K0R/LG3, and three 128-pin 78K0R/LH3. All the new Flash microcontrollers feature on-chip liquid crystal display (LCD) driver optimized for handheld healthcare diagnostic instruments — such as blood glucose meters, building utility meters for the gas/water/electricity markets, and FA equipment. The prices of the new microcontrollers is dependent on memory capacity and package type. For example, the 128-pin 78K0R/Lx3 MCU with 128 KB of flash memory and 7 KB of RAM is sample priced at 800 yen per unit. Mass production of these new products is scheduled to begin in October 2009, and is expected to reach 1,000,000 units per month in 2010.

The new All Flash microcontrollers feature NEC’s 16-bit 78K0R CPU core. The 78K0R CPU core integrates all the necessary functions to construct systems using LCD segmented displays. The new devices also reduce standby power consumption to 1.2 microamperes (uA) with the LCD enabled.


  • Reduced number of components
    The new MCUs have an LCD controller/driver circuit, 12-bit A/D and 12-bit D/A converter, operational amplifiers, and voltage reference that produces metrical voltage when using analog circuit, all integrated into one chip. As a result, the number of components including the CPU core decreased from six to one, making it possible to reduce the cost of components and to shrink the PCB layout area.
  • Reduced standby operating power by 90%
    The K0R/Lx3 All Flash microcontrollers use a capacitor split technique that produces LCD drive voltages method by capacitor splitting VDD. This system produces LCD bias voltages without a wasted DC bias current, thereby dramatically cutting LCD drive current losses. Through these improvements, when the LCD display is enabled but the CPU is de-activated, standby operating current is reduced by 90% to 1.2 µA as compared to previous products.
  • Wide selection of products
    There are 12 MCUs in the lineup — six 80-pin 78K0R/LF3 MCUs, three 100-pin 78K0R/LG3 MCUs, and three 128-pin 78K0R/LH3 MCUs. Designers can choose the optimum configuration for their applications.

More info: NEC Electronics