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New Products
MB91260 Series
Microcontroller Mounted with the highest-speed A/D Converter in the Industry
MB91260 Series
A microcontroller using a 32-bit RISC CPU from the FR60Lite Series. With its high-speed product-sum macro, multi-function timer, and A/D converter at 12 inputs/3 units, this new product is optimal for devices requiring inverter control.
FR60Lite Series 32-bit
Overview
This new microcontroller is configured with a core 32-bit RISC CPU from FR60Lite Series, making it ideal for inverter control. Besides its high-speed product-sum macro and multifunction timers configured with input capture, output compare and a waveform generation circuit, the device is mounted with A/D converters at 12 inputs/3 units. The microcontroller function is suited for a wide range of appliances, including home appliances that require inverter control (such as air conditioners and washers), as well as devices requiring system control (such as printer engines, automobile audio products, pachinko products, and so on). Fig.1 shows FUJITSU s line-up of microcontrollers with built-in multi-function timers.
2 channels 2 channels) and a series of built-in, high-speed A/D converters with conversion times of 1.2 s at minimum (at machine clock operation of 33MHz, with sampling time included). The function to interlock with the multi-function timer is ideal for applications requiring inverter control. The high-speed A/D converters are capable of interlock startup with the free run timer in the multi-function timer section (output compare function) and DMAC transfer.
Photo 1 External View
Features
Repletion of Resources Suited to Inverter Control
s 12-Channel 10-bit High-Speed A/D Converter Mounted (2 inputs 2 units 8 inputs 1 unit) This product is configured with 12 channels (8 channels
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With these functions, inverter control can be efficiently executed by detecting the current running in the protection resistance section of the motor-driving element and controlling the rotation element position. In interlock with the free run timer (output compare function), the device can execute delay startup from the same point, or startup at the compare clear match and zerodetection point. A/D startup point adjustment is also possible. s Multi-Function Timer Mounted This product consists of the following. 16-bit free run timer 1 16-bit output compare 6 16-bit input capture 4 8/16-bit PPG timer 8 Waveform generator 1 A/D startup compare 2 The microcontroller can generate carrier frequency, basic signals, and non-overlap signals, and is designed to perform various signal controls (waveform generator section) required for inverter control. The product can output 12 separate waveforms, and measure input pulse width/external clock cycle.
s Timer Macro Repletion Besides the multi-function timer, three different types of timers are built in. PWC timer 2 Reload timer 3 U timer 3 s High-Speed Product-Sum Macro Mounted With its high-speed product-sum macro, MB91260 is optimal for purposes that require high-speed operation processes. It is possible to operate completely in parallel with the CPU. The ability to execute 16 bits 16 bits 40 bits product-sum operation in a single cycle (33MHz at maximum) qualifies the product for application to sound processing, as well as image processing operations such as filter, FFT, and DCT. As an added feature, a 256-word command RAM, 64-word XRAM, and 64-word Y-RAM are all built in.
FR60Lite Core Adopted
The product adopts an FR60Lite core which is compatible with our CPU core FR Series.
Figure 1 Line-up of FUJITSU s Microcontrollers with Built-In Multi-Function Timers

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Other Built-in Peripheral Functions
Multi-Function Timer Macro
With the use of the multi-function timer macro, the product can generate the triangular modulation waveforms used in most general-purpose inverters. As an example, Fig. 2 shows the waveform output required for generating triangular modulation (double-edge modulation) PWM using a triangular wave as a carrier. According to this figure, the basic signals of U/V/W phase are realized with one 16-bit free run timer and 3 compare registers. In addition, dead time can be generated by three 16-bit timers. Fig. 3 shows the outline of the internal configuration of the multi-function timer, and Figs. 4 and 5 show the block diagram and pin assignments.
s Built-in RAM/ROM Density and ROM Type The following types are now in the development pipeline. MB91263: RAM 8K bytes Mask ROM 128K bytes MB91F264: RAM 8K bytes Flash Memory 256K bytes s External interrupt input: 10 channels s DMAC ( DMA Controller) : 5 channels s Watchdog timer s Low power consumption mode: Sleep/stop function s Power supply: 4.0V to 5.5V s Package: FPT-100P-M06
Applicable Applications
This product offers excellent CPU capabilities of FR60Lite, a rich group of timers, a multi-channel, high-speed A/D converter, and 5V I/O. With these functions, this product can be used in wide range of purposes not only in inverter-related
Figure 2 Example of Waveform Generation for Triangular Wave Modulation PWM
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products such as refrigerators, washers and air conditioners, but also in printer engines, automobile audio products, electronic products, pachinko products, coin mechs, and so on.
designed to simplify programming tasks to meet the diversified needs of program designers. A special evaluation board that permits real-time debugging is in the development pipeline. Table 1 lists available development tools.
Development Environment
This product is supported by SOFTUNETM V5/V6, a FUJITSU integrated software development environment. Likewise conventional FR Series, SOFTUNE V5/V6 application software is
NOTES
* SOFTUNE and REALOS are trademarks of FUJITSU LIMITED.
Figure 3 Outline of Multi-Function Timer's Internal Configuration
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Figure 4 Block Diagram
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Figure 5 Pin Assignments
Table 1 Development Tools
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