The MB90F387, a powerful flash CAN microcontroller, is housed in a minute 48-pin enclosure with plastic encapsulation measuring only 7 mm2. This Fujitsu Microelectronics Europe device, is believed to be the smallest microcontroller in the world with a full CAN interface.
Adopting the peripheral blocks and the CPU of the 64-pin 16 bit 64 KB MB90F497G microcontroller, which is already in worldwide use, Fujitsu implemented a die shrink, which enabled the same number of gates to be integrated within the smaller housing at reduced cost. Contrary to the normally cost-driven practice of applying new manufacturing technology to the largest and most complex chips first, Fujitsu opted to develop devices at the low end of the company's 16LX series 16 bit microcontroller range at the same time as high-end devices.
From this device, right up to the upper end of the family, currently represented by a chip integrating 384 KB of flash memory and 10 KB of RAM in a 120-pin package, the Fujitsu 16LX series covers a unique spectrum, with as many as 12 devices featuring full CAN interface and embedded flash in addition to a large number of mask ROM variants.
All family members of 16LX microprocessors feature 16 bit architecture, with 2 MB of address space, on-chip PLL, a 4 byte instruction queue and multiplication and division instructions. Around the CPU are a 10 bit ADC converter, a flash macro with integrated charge pump for rewriting the memory without auxiliary voltage and a CAN module. The CAN 2.0A and 2.0B compliant module is available with 8 or 16 buffers, which can be programmed individually for receiving or sending data.
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