■ DESCRIPTION

The MB91625 series is a line of FUJITSU MICROELECTRONICS microcontrollers based on a 32-bit RISC CPU core that feature a variety of peripheral functions for embedded applications that demand high-performance and high-speed CPU processing.

This series is based on the FR80* family CPU and is implemented as a single chip.

* : FR, the abbreviation of FUJITSU RISC controller, is a line of products of Fujitsu Microelectronics Limited.

■ FEATURES

• FR80 CPU

• 32-bit RISC, load/store architecture, five-stage pipeline

• General-purpose registers : 32-bit × 16

• 16-bit fixed-length instructions (basic instructions) : 1 instruction per cycle

• Instructions suitable for embedded applications

   - Memory-to-memory transfer, bit processing, barrel shift instructions, etc.

   - Instruction support for high level languages

      Function entry and exit instructions, instructions for register multi-load and multi-store

   - Bit search instruction

   “1” detection, “0” detection, transition point detection

   - Branch instructions with delay slots

      Reduced overhead when processing branches

   - Register interlock functions

      Facilitate coding in assembly language

   - Built-in multiplier/instruction-level support

      - Signed 32-bit multiplication : 5 cycles

      - Signed 16-bit multiplication : 3 cycles

   - Interrupts (save PC and PS) : 6 cycles, 16 priority levels

   - Harvard architecture allowing program access and data access to be executed simultaneously

   - Instruction prefetch function has been added with 4 word instruction queue of CPU

• Instruction compatible with FR family CPU

   - Additional bit search instructions

   - No resource instructions and coprocessor instructions

• Maximum operating frequency

   • CPU : 60 MHz

   • Resources : 40 MHz

• DMA controller (DMAC)

   • 8 channels

   • Address space : 32 bits (4 Gbytes)

   • Transfer modes : Block transfer/burst transfer/demand transfer

   • Address update : Increment/decrement/fixed (increment/decrement step size of 1, 2, or 4)

   • Transfer data length : Selectable from 8-bit, 16-bit, 32-bit

   • Block size : 1 to 16

   • Number of transfers : 1 to 65535

   • Transfer requests

      - Requests from software

      - Interrupt requests from peripheral resources (interrupt requests are shared, including external interrupts)

   • Reload functions : Reload can be specified on all channels

   • Priority order : Fixed (ch.0 > ch.1 > ch.2 > ch.3 > ...) or round-robin

   • Interrupt requests : Interrupts can be generated for transfer complete, transfer error, and transfer interrupted.

• Multifunction serial interface

   • 4 channels with 16-byte FIFO, 8 channels without FIFO

   • Operation mode is selectable from the followings for each channel (For ch.0, I2C is not available.)

      • UART

         - Full-duplex double buffer

         - Selectable parity on/off

         - Built-in dedicated baud rate generator

         - External clock can be used as a serial clock

         - Error detection function for parity, frame and overrun errors

      • CSIO

         - Full-duplex double buffer

         - Built-in dedicated baud rate generator

         - Overrun error detection function

      • I2C

         - Supports both standard mode (Max 100 kbps)and Fast mode (Max 400 kbps)

         - Some channels are 5 V tolerant

      • Interrupts

         • Total of 32 external interrupts (some pins are 5 V tolerant)

         • Interrupts from peripheral resources

         • Programmable interrupt levels (16 levels)

         • Can be used to return from stop mode, sleep mode

• A/D converter

   • 16 channels, 1 unit

   • 10-bit resolution

   • Conversion time : approx. 1.2 μs (PCLK = 33 MHz)

   • Priority conversion (2 levels)

   • Conversion modes : Single-shot conversion mode, scan conversion mode

   • Activation sources : Software, external trigger, base timer

   • Built-in FIFO for storing conversion data (for scan conversion:16, for priority conversion:4)

• D/A converter

   • 2 channels

   • 8-bit resolution   (Continued)