New Products FR Family MB91F465XA 32-bit Microcontroller with Built-in FlexRay for Automotive Control Systems FR Family MB91F465XA Optimal for next-generation automotive control systems with built-in FR CPU cores capable of fast control and peripheral resources with reinforced functions. This product is a 100MHz-operation microcontroller that offers various built-in functions including FlexRay, which is under the spotlight for the next-generation automotive network, and already widely used CAN. Overview Product Features In recent years, X-by-Wire technology, which is used to electrically control conventional hydraulically controlled systems, has been receiving increased attention for its use in next-generation automotive systems. Automobile data has been increasing in volume and becoming more and more complex. As such, faster and more reliable networks are necessary. In this context, FlexRay shows great promise as a next-generation automotive network. The FlexRay microcontroller“MB91F465XA”that FUJITSU has developed has a built-in 32-bit RISC, FR core to increase the maximum operation frequency to 100MHz. Its high versatility and compact specifications will allow a flexible shift from the various existing CAN bus systems to FlexRay. Furthermore, it can be applied as a gateway between conventionally used CAN and FlexRay. Fig.1 shows the target applications of FlexRay. Fig.2 presents the block diagram. The built-in resources in this product deliver the following features: Photo 1 External View 2007 No.4 FIND Vol.25 1 New Products FR Family MB91F465XA ■ FR60 core This product adopts an FR60 core that is instruction-compatible with the FR , series. The FR60 core is FUJITSU s 32bit RISC CPU core that realizes high performance and low power consumption and is capable of operation at a maximum operation frequency of 100MHz. Figure 1 Target Applications for FlexRay Application + CAN Expansion Focusing on X-by-Wire EPS Gateway ■ Built-in Flash memory capacity Main Flash memory: 544Kbytes Flash memory security addressed AT ● ● Steering sensor ■ Built-in RAM capacity 32Kbytes Instruction cache: 8Kbytes ABS/ESC ● ● ■ FlexRay communication controller An IP provided under license from German Bosch that conforms to FlexRay Ver2.1. Supports communication speed up to 10Mbps. Figure 2 Block Diagram FR60 CPU core EDSU/MPU RAM 16Kbytes ■ CAN controller Conforms to Parts A and B of CAN specification version 2.0. There are 32 built-in message buffers for data and ID with ranking. Supports communication speed up to 1Mbps. ■ Various timers 16-bit free-run timer 16-bit input capture 16-bit output compare 16-bit PPG: Selection possible from oneshot output/PWM output (synchronous output possible up to 4 channels) 16-bit reload timer RXDA，RXDB TXDA，TXDB TXENA，TXENB FlexRay I bus 32 D bus 32 CAN (2 channels) RX0， 4 TX0， 4 32 to 16 Bus adapter Direct map cache 8Kbytes Flash memory ROM 544Kbytes Bus converter RAM 16Kbytes ● ● ● ● ● ■ Various interfaces LIN-supporting USART (with 16bytes FIFO) I2C interface ● DREQ0 DACK0 DEOP0 IOWRX IORDX DMAC (5 channels) R bus 16 Interrupt controller Clock control External interrupt 11 channels TRG0-3 PPG0-7 PPG (8 channels) TIN0-7 TOT0-7 Reload timer (8 channels) FRCK0-7 Free-run timer (8 channels) ICU0-7 Input capture (8 channels) ■ High-speed A/D converter Sequential conversion A/D converter realizing 10-bit resolution (Minimum conversion time 3μs, total error ±3LSB: Vcc＝Avcc＝3.0V to 5.5V) OCU0-5 Output compare (6 channels) Port interface PORT LIN-UART (3 channels) SIN4，6，7 SOT4，6，7 SCK4，6，7 I2C ● NMIX INT0-15 SDA0 SCL0 RTC A/D converter (16 channels) 2007 No4 AN0-12，16-19 ATGX FIND Vol.25 2 New Products FR Family MB91F465XA ■ Low power consumption mode: Sleep/stop functions The low power consumption modes are sleep mode (program stops) and stop mode (device stops). Utilizing them, standby current consumption can be reduced dramatically. ■ I/O port Input permission setting: Setting possible for each port Input level setting: Selection possible from 4 input levels; CMOS /CMOS hysteresis /Automotive/TTL Pull-up resistor setting: Setting possible for each port (standard: 50kΩ) Table 1 presents the voltage for each input level. ● ● ● ■ Other peripheral functions External interrupt DMAC Watchdog timer Real-time clock Clock monitor Low voltage detection circuit Power-supply voltage: 3.0V to 5.5V ● ● ● automobiles has been increasing and many of these applications are connected to the CAN bus network. Specifically, EPS (electric power steering) executes CAN communication, sensing by AD converter, and so forth during high-speed operation to control the motor. In the future, the EPS system is expected to be connected to the FlexRay network. In this case, motor control must be implemented to suit the carrier frequency and FlexRay will require processing within the communication cycle, resulting in many restrictions in terms of time. This problem can be solved using separate microcontrollers for motor control and system control. This allows this product to be used for system control including FlexRay control with fewer restrictions in system control or time as well as lower program development difficulty. Fig.3 presents the EPS system block diagram with adoption of this product. ● ● Table 1 Input Level Settings and Input Voltage ● ● Item Application Fields VIL（V） VIH（V） Input level 0.3Vcc 0.7Vcc CMOS input 0.2Vcc 0.8Vcc CMOS hysteresis input 0.5Vcc 0.8Vcc Automotive input 0.8 2.1 TTL input Input voltage The number of applications that utilize the motor in Figure 3 EPS System Block Diagram MB91F267N Torque sensor A/D SIO Motor control CPU A/D Pre-driver Motor control PPG I/O Resolver sensor Analog input system ･ Motor temperature sensor ･ Motor driver temperature sensor ･ Battery voltage ･ Potentiometer signal, etc. モータ制御禁止 SIO A/D System control CPU FlexRay/CAN FlexRay/CAN bus MB91F465XA I/O I/O SW input system ･ Ignition SW ･ Power steering SW ･ Relay check signal ･ Overcurrent detection input 2007 No.4 FIND Vol.25 3 New Products FR Family MB91F465XA Development Environment NOTES * Other company names and brand names are the trademarks Like the conventional FR Series, this product is supported by the FUJITSU integrated development environment SOFTUNE V6. SOFTUNE V6 application software is designed to simplify programming tasks in order to meet the diverse needs of program designers. Furthermore the evaluation board for FlexRay (MB2006-02), which is capable of immediately evaluating FlexRay, is available. Table 2 lists the development tools. ✱ or registered trademarks of their respective owners. Table 2 Development Tools Emulator main unit MB2198-01 Adapter board MB2198-600 Evaluation chip MB91V460 (already on the adapter board) Header board MB2198-602 (LQFP-100: 0.5mm-pitch, 14mm×14mm) FlexRay expansion board MB2198-603 Evaluation board MB2006-02（MB91F465XA incorporated） Hardware SOFTUNE V6 Workbench SOFTUNE V6 C compiler Software SOFTUNE V6 assembler SOFTUNE V6 C/C++ analyzer SOFTUNE V6 C checker Photo 2 Evaluation Board for FlexRay (MB2006-02) DC 12V CAN B（CAN0） MB91F465XA CAN A（CAN4） UART C / LIN B （UART7） FlexRay A UART B / LIN A （UART6） FlexRay A UART A（UART4） 2007 No4 FIND Vol.25 4