16-bit MCUs optimised for rechargeable NiMH applications

25th August 2016

Nat Bowers

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Datasheet

Optimised for compact, battery-driven industrial equipment in noisy environments, the ML620130 family of 16-bit low power MCUs has been announced by LAPIS Semiconductor, a member of the ROHM group. The MCUs feature superior processing capability with low power consumption and an operating voltage successfully reduced from 1.8 to 1.6V.

Optimising the operating voltage extends the supply voltage detection range down to 1.63V (typical) – very close to the voltage of two nickel metal hydride batteries (0.8Vx2=1.6V) – reducing the number of charge cycles and memory effects while prolonging battery life. The ML620130 family consists of nine models offered in a variety of memory capacities, pin counts and other characteristics that make it possible for users to select the ideal solution to fit set needs in sensor module, battery charge control, compact electric tool, portable and industrial equipment applications.

16MHz CPU and 32MHz (PWM) peripheral clock operations double performance over ROHM standard lineup of ‘tough’ MCUs, while operating current is reduced by more than 25% (compared to typical published values).

A high-accuracy on-chip RC-type oscillator is built in (±1% at -20 to +85°C, ±1.5% at -40 to +105°C). UART communication (asynchronous method), which has been widely adopted for a variety of uses as an interface for external equipment, is enabled throughout the entire temperature range without an external oscillator, reducing peripheral component costs. In addition, both full-duplex (1-channel) and half-duplex (2-channel) modes are allowed, and in the event that bidirectional communication is not required at the same time the two receiving terminals and two transmission terminals can be flexibly assigned, making it possible to mount on smaller boards.

High noise immunity inherited from LAPIS Semiconductor’s conventional lineup of low-power MCUs makes it possible to clear the ±30kV Level 4 measurement limit (air discharge: ±15kV) of the IEC61000-4-2 standard (electrostatic immunity testing standard). In addition, implementing circuit enhancements related to power lines and noise intrusion pathways resulted in a 30% improvement in noise resistance (verified via indirect discharge using LAPIS Semiconductor’s reference board under specific conditions).

The ML620130 MCUs are available now.