■DESCRIPTION
The FR family* is a line of single-chip microcontrollers based on the 32-bit high-performance RISC CPU while
integrating a variety of I/O resources for embedded control applications which require high-performance, high
speed CPU processing. The FR family contains multiple channels of data slicer and communication macros, best suited for embedded applications such as TV control.

■FEATURES
1. FR CPU
• 32-bit RISC, load/store architecture with a five-stage pipeline
• Operating frequency 33 MHz [PLL used : Oscillation frequency 16.5 MHz : Doubled]
• 16-bit fixed length instructions (basic instructions), 1 instruction per cycle
• Instruction set optimized for embedded applications : Memory-to-memory transfer, bit manipulation, barrel shift instructions etc.
• Instructions adapted for high-level languages : Functionentry/exit instructions, multiple-register load/store
instructions
• Register interlock functions : Facilitating coding in assemblers
• On-chip multiplier supported at the instruction level
   Signed 32-bit multiplication : 5 cycles
   Signed 16-bit multiplication : 3 cycles
• Interrupt (PC, PS save) : 6 cycles, 16 priority levels
• Harvard architecture allowing program accessand data access to be executed simultaneously
• Instruction prefetch feature added by a 4-word queue in the CPU
• Instruction set compatible with FR family

2. Simple External Bus interface
Capable of functioning 8-bit or 16-bit multiplex bus by setting with program
• Operating frequency : Max 16.5 MHz
• 8/16-bit data/address multiplex I/O
• Capable of chip-select signal output for completelyindependent four areas settable in 64 Kbytes minimum
• Basic bus cycle : 2 cycles
• Programmable automatic wait cycle generator capable of inserting wait cycles for each area

3. Internal Memory
MB91314A : 256 Kbytes Mask ROM, RAM 32 Kbytes
MB91F314 : 512 Kbytes Flash, RAM 32 Kbytes

4. DMAC (DMA Controller)
• 5 channels
• Two forwarding factors (internal peripheral/software)
• Addressing mode 20/24-bit address selection (increment/decrement/fixed)
• Transfer modes (burst transfer/step transfer/block transfer)
• Selectable transfer data size : 8, 16, or 32 bits

5. Bit Search Module (for REALOS)
   Search for the position of the bit 1/0-changed first in one word from the MSB

6. Reload Timer (Including 1 Channel for REALOS)
• 16-bit timer ch.6
• The internal clock is optional from 2/8/32 division

7. Multi function Serial Interface
• 11 channels
• Full duplex double buffer
• Capable of selecting communication mode : asynchronous (Start-Stop synchronous) communication, clock synchronous communication (8.25 Mbps Max), I2C* standard mode (100 kbps Max), high-speed mode (400 kbps Max)
• Parity on/off selectable
• Baud rate generator per channel
• Abundant error detection functions are provided (parity, frame, and overrun)
• External clock can be used as transfer clock
• Ch.0 to ch.2 correspond to DMA transfer.
• Ch.0 to ch.2 have a pair of 16 bytes FIFO buffers for transmission and reception.
• I2C bridge feature (among channels 0, 1, and 2)
• SPI mode

8. Interrupt Controller
• A total of 24 external interrupt lines (external interrupt pins INT23 to INT0)
• Interrupt from internal peripheral
• Programmable 16 priority levels
• Available for wakeup from STOP mode

9. A/D converter
• 10-bit resolution, 10 channels
• Successive approximation type : conversion time : About 8.0 µs
• Conversion mode (Single-shot conversion mode, scan conversion mode)
• Startup sources (software/external trigger)

10. PPG
• 4 channels
• 16-bit down counter, 16-bit data register with cycle setting buffer
• The internal clock is optional from 1/4/16/64 division
• Support for automatic cycle setting by DMA transfer
• Function for supporting remote control transmission

11. PWC
• 1 channel (1 input)
• 16-bit up counter
• Simple digital lowpass filter

12. Multi-function timer
• 4 channels
• Lowpass filter eliminating noise below a pre-set clock frequency
• Capable of pulse width measurement using seven types of clock signals
• Pin input event count function
• Interval timer function using seven types of clock signals and external input clock
• Internal HSYNC counter mode

13. Closed caption decoder feature
• 1 channel
• CC decoder function
• ID-1 (480i/480p) decoder function

14. Other interval timers
• Watch timer (32 kHz, Count up to 2 seconds)
• Watchdog timer

15. I/O port
   Max 78 ports

16. Other features
• Internal oscillator circuit as a clock source
• INITis prepared as a reset terminal
• Watchdog timer reset and software reset are available
• Stop and sleep modes supported aslow-power consumption modes
• Gear function
• Built-in time base timer
• 5 V tolerant I/O (some pins)
• Package LQFP-120, 0.50 mm pitch, 16.0 mm ×16.0 mm
• CMOS technology (0.18µm)
• Power supply voltage 3.3 V ±0.3 V, 1.8 V ±0.15 V dual-power