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Motor control MCUs tout analog voltage comparators

05 Jun 2012

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Fujitsu Semiconductor Asia Pte Ltd has announced the release of three models of its MB95690 series, enhancing the lineup of its new 8FX Family. The new product embeds a DC brushless motor controller and two analog voltage comparators, which makes it more suitable for motor control applications. As an updated version of the company's 95390H series, it is pin-to-pin compatible with the 95390H series.

In response to the energy-saving market's increasing need for the 8bit microcontroller with DC brushless control function for home appliances and office equipment, Fujitsu Semiconductor expanded its 8FX Family lineup. Aside from the DC brushless motor control function support, the new series also integrates two analog voltage comparators and is compatible with various composite timers and communication functions. Thus, it can be used either as a main microcontroller or a sub-microcontroller supplementing function insufficiency in existing system configurations.

The 1-wire on-chip debug module embedded in the chip allows occupation of only one pin when the customer debugs the program, which benefits customers in product development. The product also has a high-precision CR oscillation circuit that can be used as the clock source of the microcontroller system. It thereby reduces the external component count required in a customer's development.

Product features include:

 • Integration of DC brushless motor controller: The DC brushless motor controller can output a three-phase PWM waveform to drive the motor. Its DC brushless motor can be applied from an air-conditioner fan motor to a PC cooling fan.
 • Less external components resulting in low cost: Equipped with the analog voltage comparator, CR oscillation circuit, voltage detection circuit as well as monitor timer circuit, the chip does not need addition of external oscillator or reset IC. It therefore reduces the system cost.
 • New processing technology leading to low power consumption: The MB95690 series employs eight levels of power-saving modes to balance MCU performance and power consumption. Application of deep standby mode enables power cutoff to the FLASH unit to further reduce power consumption.
 • Embedding of high-performance Flash: Due to the embedding of high-performance Flash, programs can be rewritten in the process of execution. Its security function can prevent illegal reading access from external parties, avoiding leakage of customer software assets. On top of these, emulation of the EEPROM function is also available.
 • New low-voltage detection (LVD) technology: Built-in low-voltage detector. The combination of detection voltage and release voltage can be selected from 4 options. This gives the application engineer more flexibility when designing products.
The MB95690 series has been sampling since March of this year, priced at $1.50 each.

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