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Fujitsu ALL FR 460 Series Application Note

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Fujitsu Microelectronics Europe
MCU-AN-300033-E-V15
Application Note
FR FAMILY
32-BIT MICROCONTROLLER
ALL FR 460 SERIES
HARDWARE SET UP
APPLICATION NOTE

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  Summary of Contents for Fujitsu ALL FR 460 Series

  • Page 1 Fujitsu Microelectronics Europe MCU-AN-300033-E-V15 Application Note FR FAMILY 32-BIT MICROCONTROLLER ALL FR 460 SERIES HARDWARE SET UP APPLICATION NOTE...
  • Page 2: Revision History

    V1.4, mode pin setting corrected, NFL 2007-09-10 V1.5, unused XA0 pin, startup external bus interface, unused SCK4 pin This document contains 22 pages. Abbreviations: Fujitsu Microelectronics Europe GmbH Microcontroller DECAP Decoupling Capacitor MCU-AN-300033-E-V15 - 2 - © Fujitsu Microelectronics Europe GmbH...
  • Page 3: Warranty And Disclaimer

    Product or parts thereof, if the Product is returned to Fujitsu Microelectronics Europe GmbH in original packing and without further defects resulting from the customer´s use or the transport.
  • Page 4: Table Of Contents

    Latch-up consideration (switch)................16 4 MINIMUM FLASH PROGRAMMING CONNECTION............20 Internal vector mode and Programming via BootROM ...........20 Programming Pins ....................20 Asynchronous Programming ..................20 Synchronous Programming..................21 5 RESET BEHAVIOUR OF GPIO PORTS AND EXTERNAL BUS........22 MCU-AN-300033-E-V15 - 4 - © Fujitsu Microelectronics Europe GmbH...
  • Page 5: Introduction

    FR460 Hardware Set Up Introduction 0 Introduction This application note describes how to set up a hardware environment for Fujitsu FR MCUs. As an example the MB91F467DA is used. © Fujitsu Microelectronics Europe GmbH - 5 - MCU-AN-300033-E-V13...
  • Page 6: Minimal System

    Note: It may be in case of external noise at SCK4 pin that the synchronous programming interface will be initialized instead of asynchronous interface. Make sure that the level at SCK4 pin is stable during the initialization of Flash loader. MCU-AN-300033-E-V15 - 6 - © Fujitsu Microelectronics Europe GmbH...
  • Page 7: Power Supply

    Because the ADC works with an internal sample capacitor the input impedance and external capacity must be low. Fujitsu recommends an input impedance of not more than 15k Ohm. Choose the external capacity as low as possible (about 1 nF for EMI protection).
  • Page 8: Unused Io Pins

    An unused pin must be terminated by a pull-up / pull-down resistor externally, or by switching on the internal pull-up or pull-down resistor before enabling the port inputs (PORTEN bit) to avoid transverse current. MCU-AN-300033-E-V15 - 8 - © Fujitsu Microelectronics Europe GmbH...
  • Page 9: Layout And Electromagnetic Compatibility

    VSS a ground plane is recommended which covers the chip package, and is connected in one point to VSS of the whole circuit. Below is a example of a bad and a good power line routing: © Fujitsu Microelectronics Europe GmbH - 9 - MCU-AN-300033-E-V13...
  • Page 10: C Pin Bypass Capacitor

    2.4 Power Supply Decoupling DeCaps for power supply have to be placed within the “current flow”. Otherwise they are senseless, because then their function become inoperable. The following graphic illustrates this: MCU-AN-300033-E-V15 - 10 - © Fujitsu Microelectronics Europe GmbH...
  • Page 11 The following routing and placement for double-sided metal layer is recommended. Note, that despite the capacitor is placed on the opposite side as the MCU, this solution is the best like for the VCC18C pin. © Fujitsu Microelectronics Europe GmbH - 11 - MCU-AN-300033-E-V13...
  • Page 12: Quartz Crystal Placement And Signal Routing

    “behind” the crystal. For single metal layer circuit board the following placement and signal routing is recommended: For double sided metal layer layout the following is recommended: MCU-AN-300033-E-V15 - 12 - © Fujitsu Microelectronics Europe GmbH...
  • Page 13: Other Documents

    Reference voltage input for the A/D converter AVRL* HVDD5*, Power supply for the SMC (high current) outputs, it is not connected to HVSS5* VDD, should be connected to extra power supply © Fujitsu Microelectronics Europe GmbH - 13 - MCU-AN-300033-E-V13...
  • Page 14 DS of related MCU series) Oscillator output, the crystal and bypass capacitor must be connected via X1, X1A* shortest distance with X1 pin, if not used so shall be open *only if supported by device MCU-AN-300033-E-V15 - 14 - © Fujitsu Microelectronics Europe GmbH...
  • Page 15: Port Input / Unused Pins / Latch-Up

    Outputs from external circuits should always be connected via a serial resistor to a MCU input pin. Debouncing and decoupling capacitors should always be chosen as smallest as possible. Please refer to chapter 3.2. © Fujitsu Microelectronics Europe GmbH - 15 - MCU-AN-300033-E-V13...
  • Page 16: Latch-Up Consideration (Switch)

    L (and capacity C An equivalent circuit diagram looks like the following illustration: By closing the switch SW at time t the following voltage can be measured at point (A): MCU-AN-300033-E-V15 - 16 - © Fujitsu Microelectronics Europe GmbH...
  • Page 17 (> 50 K Ohms), its damping effect is weak. This (weakly) attenuated oscillator causes voltage overshoots on the port pin, drawn in red in the illustration below: © Fujitsu Microelectronics Europe GmbH - 17 - MCU-AN-300033-E-V13...
  • Page 18 This solution has two disadvantages: First the debouncing effect decreases and second, there is no guarantee, that the latch-up condition is eliminated. A better solution is to use a series resistor at the port pin like in the following schematic: MCU-AN-300033-E-V15 - 18 - © Fujitsu Microelectronics Europe GmbH...
  • Page 19 The resistor must not be chosen too high, so that the port pin input voltage V within the positive CMOS/TTL/Automotive level. © Fujitsu Microelectronics Europe GmbH - 19 - MCU-AN-300033-E-V13...
  • Page 20: Minimum Flash Programming Connection

    Otherwise this port pins will be floating. Another way is to use an external pull up or down resistors. Make sure the MCU-AN-300033-E-V15 - 20 - © Fujitsu Microelectronics Europe GmbH...
  • Page 21: Synchronous Programming

    RESET Figure 2: Serial synchronous programming interface For pin connection and pull up/down resistors please refer to asynchronous programming. Please note the SCK4 has to be threatened electrically equal to SIN4. © Fujitsu Microelectronics Europe GmbH - 21 - MCU-AN-300033-E-V13...
  • Page 22: Reset Behaviour Of Gpio Ports And External Bus

    Input HiZ Note: If the external bus pins should be used as GPIO function the address and bus control lines are driven as output at high level directly after the reset initialization. MCU-AN-300033-E-V15 - 22 - © Fujitsu Microelectronics Europe GmbH...