Fujitsu Microelectronics introduces the next generation of 16-bit microcontrollers - the 16FX series.

Fast

16FX series is based on an improved CPU with significantly increased internal bus bandwidth. As a result, program execution is accelerated, as can be seen in the Dhrystone benchmark (Dhrystone 2.1 compared to MB90340 series). 16FX is about 3 times faster (depending on the memory model used) than 16LX at the same clock frequency. For example at 24MHz 16FX achieves more than 11 real MIPS (Dhrystone 2.1). The architecture improvement is particularly visible when handling large data structures (see memory model ‘Large’ in graph 1). But that’s not all. New technology and improved design allow for CPU frequencies up to 56MHz - thus achieving processing performance ranges of 32-bit process.

Efficient

16FX combines the advantages of 16- and 32-bit architectures. The C-code efficiency benefits from the 16-bit instruction set. Instruction Pipelining, a technique widely used in the 32-bit RISC world, allows 16FX to reach RISC-like performance. With instructions completed in less clock cycles, the same performance is achieved with less power consumption (compared to architectures without pipelining).

The 16-bit bus width again is an advantage for a low power consumption result compared to 32-bit architectures. A 32-bit bus will have a higher capacitance which increases current consumption particularly at high frequencies. The use of latest CMOS technology also translates into efficient use of silicon space (smaller chip) and lower power consumption.

16FX specific power reduction features include a reduced internal CPU supply voltage, peripheral clock speed selectable independently from CPU speed, and reduced number of clocks per instruction (CPI). The result is an 80% reduction in power consumption compared to 16LX at the same performance.

Features

• 20 Dhrystone MIPS computing performance (V.2.1)
• On-chip oscillators for short start-up, clock supervisor function, sub-clock or main clock operation
• Start-up time <1ms to RC run mode, <8ms to PLL run mode
• Operating voltage range 3.0-5.5V
• Internal CPU voltage reduced to 1.8V (less current consumption, less EM emissions)
• New energy-saving options: separate clock dividers for core and peripherals
• DMA: several channels that can be assigned to any peripheral resource
• One Byte per clock cycle transfer speed
• Embedded Debugging: firmware support for debugging via USART (no need to link a monitor kernel to application software) Low voltage detection reset: available on all 16FX devices
• Interrupt: every resource has its own interrupt.
• A table base register allows relocating the base address of the interrupt vector table
• Ports: up to 4 different input levels selectable by software ‘port input enable’ function allows pins to be left open (no termination by resistor required)
• CAN: each channel offers 32 message buffers. Bosch C-CAN.
• PWM generation: improved programmable pulse generators offer more channels at full 16-bit resolution. Duty cycle and frequency are controlled in separate registers

Embedded Flash Technology

All of the F2MC-16 series are supported by at least one device that has Flash ROM as the user programmable memory.

Features

• Blocks divided into separately erasable sectors
• Erase protection by sector capability
• Supports programming by on-chip firmware Embedded Algorithm™
• No second programming voltage required
• 10,000 erase cycles 20-year data retention
• Programming by three methods:
  
  • On ordinary programmer with adaptor as with traditional OTP devices
  • Using Fujitsu embedded serial programming mode via on-chip UART/SIO directly to the flash ROM
  • Copying or downloading to flash using customer’s own bootstrap software
• Programming via CAN possible
• ‘Flash Security’ read-out protection available on most flash devices

Microcontrollers with CAN Bus Controller

Fujitsu has a unique portfolio of 16-bit devices available offering a full featured CAN bus protocol controller as an onchip peripheral for automotive and industrial applications. The details of these parts are listed in the tables listing on the device features in our Product Overview.

16LX Compatible

The 16FX CPU uses all 16LX machine instructions. With the same instruction set, the Assembler and C-compiler are also unchanged when switching from LX to FX CPU. Quite a few of the 16LX peripherals can be found again on 16FX - making software conversion from LX to FX an easy task. On the hardware side it is even easier. The first 16FX product is fully pin-compatible to the successful MB90340 (16LX) series. No need for a PCB change. You can even use the same Fujitsu Starter Kit (Flash-CAN-100P-340).