Fujitsu Introduces 32-Bit RISC Microcontrollers With External Bus and On-Chip Flash for Industrial Applications

Nuremberg (PRWEB) February 22, 2005

Fujitsu Microelectronics has announced a new feature-rich 32-bit RISC microcontroller series designed to operate at 3.3V. The devices incorporate an external bus for memory expansion or the direct connection of Graphic Display Controllers.

The new microcontrollers capitalise on a powerful FR60 core running at up to 50MHz with a 5-stage pipeline, 16-bit fixed-length instruction set, and built-in hardware multiplier and barrel shifter. They were specifically designed for a wide range of embedded control applications including digital home appliances.

The devices integrate 512kByte of embedded Flash memory as well as 24kByte of embedded SRAM. The versatile external interface allows direct access to 16-bit SRAM as well as asynchronous ROM (Page Mode Flash supported). This, together with its high-speed 5-channel Direct Memory Access Controller (DMAC), guarantees fast data transfer and simplifies circuit board design.

Serial communication is supported by an I2C interface and up to five USARTs (each with their own baud rate generator). Four independent ICU (Input Capture Unit) channels are included together with up to eight OCU (Output Compare Unit) channels, four 16-bit reload timers and up to six PPG timers. A maximum 12 channels of 10-bit A/D converter as well as up to three channels of D/A converter complete this powerful data processing engine.

To enable maximum flexibility, if a resource function is not used the respective pin can be used as standard input or output pin.

A flexible clock concept offers several internal clock frequencies as well as individual settings for the core, the peripherals and the external bus interface. These, combined with the standard power management function assists the user in finding the optimum trade-off between performance and power consumption for specific applications.

Implemented in 0.35µm CMOS technology, this advanced microcontroller series currently consists of two devices, the MB91F353 in an LQFP-120 package and the MB91F355 with additional features in an LQFP-176 package.

For users needing to start software development before their target board is available, Fujitsu offers the low-cost MB91350 starter-kit (SK-91F355-176PMT). The starter-kit has all MB91F355 pins routed to connectors, makes all this device’s resources available for evaluation, allows usage of an unregulated external 9V-12V DC power supply and includes a 3.3V internal power supply with power-LED. Also incorporated are the 12.5MHz main-crystal, two UART transceivers and 8MByte Flash, 2MByte SRAM and 128KByte FRAM®. Additionally, eight user LEDs, a reset-button, a reset-LED, and five user-buttons configurable for INT4, INT5, TRG4, NMI and ADTG/INT7 are included.

The starter-kit is equipped with a graphic board connector (VG96ABC, VG48ABC) and a power supply for graphic boards (5V, 3V3, 2V5) to enable connection to Fujitsu’s Graphic Controller Boards.

The MB91F353/F355 32-bit microcontrollers and MB91350 starter-kit are available now.

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