Fujitsu Launches its MB90890 Series of 16-Bit CAN Microcontrollers

Tokyo, January 14, 2003

Fujitsu Limited today announced the release of two products in its new MB90890 series of 16-bit microcontrollers that support the Controller Area Network (CAN) interface, the standard protocol for automotive network applications. These are the first products to use Fujitsu's newly developed F2MC-16LX 16-bit microcontroller architecture, the world's first with dual-operation flash memory. The two products are available starting today.

CAN has emerged in recent years as the international standard for vehicle networks. Since 1998 Fujitsu has offered an extensive line of CAN-based microcontrollers for enhanced automotive safety and comfort.

The newly developed products are embedded with dual-operation flash memory in a single chip, thereby enabling on-board simultaneous read/write processing, unlike conventional chips, for which all data configurations need to be stored on an external EEPROM when the device powers down.

Features of Fujitsu's new MB90890 series:

1. Dual-operation memory

Conventional embedded systems need to write out data to external EEPROM or other forms of non-volatile memory when powering down. The new products employ Fujitsu's leading-edge flash-memory technology, offering 64 KB of dual-operation memory in two banks, which allows data to be rewritten while a program is executing on the same chip.

This eliminates the need for external memory chips, reduces chip area demands, and lowers costs. Furthermore, the ample amounts of non-volatile storage make new features possible, so that driving distance, seat positions, and other bits of data can be recorded to facilitate controls for improving comfort, safety, and communications. Doing away with the need for external storage also eliminates the associated security-related concerns

2. Compatible with a wide range of operating voltages: 3.5 - 5.5 V

UThe new microcontrollers are designed for greater reliability, even when the power supply fluctuates.

3. Stricter threshold for Low input voltage

Fujitsu tightened its tolerance for the Low voltage threshold, from 30% of Vcc to 50% of Vcc. This provides adequate margin for circuit design while enhancing the system's resistance to noise.

Fujitsu plans to expand its line of microcontrollers with embedded dual-operation flash memory, and remains committed to helping its customers build better products more economically through its F2MC line of system controllers, which offer simpler system design, reduced part counts, and lower real-estate demands for automotive, digital entertainment and car-audio applications.

Main Specifications of the MB90890 Series

Process technology: CMOS 0.35 micrometer
Power supply: 3.5 to 5.5V
Operating temperature: -40 to 105C
Minimum instruction execution time: 62.5 ns @ 4MHz (PLL clock multiplier x4)
RAM: 2 Kbytes (both products)
Flash memory:
MB90F897: 64 Kbytes w/ sub-clock
MB90F897S: 64 Kbytes, no sub-clock
I/O ports:
MB90F897: 34 (w/ sub-clock, max)
MB90F897S: 36 (no sub-clock, max)
Standby modes: sleep(*1), stop(*2), CPU-intermittent(*3)
Timer functions: all timer functions included
Interrupt functions: Delayed interrupt, DTP (*4), external interrupt
UART (SCI) functions : 2 channels
CAN controller: 1 channel
Input level: software-selectable
AD converter: 8 channels (8/16 bits)
Packaging: 48-pin low-profile quad flat package