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Fujitsu Microelectronics Europe

Application Note

MCU-AN-300033-E-V15

FR FAMILY

32-BIT MICROCONTROLLER

ALL FR 460 SERIES

HARDWARE SET UP

APPLICATION NOTE

Summary of Contents for ALL FR 460 Series

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

Page 2: ...2006 10 06 V1 2 Reset behaviour of GPIO ports and external bus interface added NFL 2007 03 07 V1 3 ceramic smooth capacitor changed to single capacitor NFL 2007 04 19 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 FME Fujitsu Microelectronics Europe GmbH MCU Microcontroller DECAP Decoup...

Page 3: ...y the customer 2 Should a Product turn out to be defect Fujitsu Microelectronics Europe GmbH s entire liability and the customer s exclusive remedy shall be at Fujitsu Microelectronics Europe GmbH s sole discretion either return of the purchase price and the license fee or replacement of the Product or parts thereof if the Product is returned to Fujitsu Microelectronics Europe GmbH in original pac...

Page 4: ...ed IO Pins 8 2 LAYOUT AND ELECTROMAGNETIC COMPATIBILITY 9 2 1 General 9 2 2 Power Line Routing 9 2 3 C Pin bypass capacitor 10 2 4 Power Supply Decoupling 10 2 5 Quartz Crystal Placement and Signal Routing 12 2 6 Other documents 13 2 7 MCU Pin Summary 13 3 PORT INPUT UNUSED PINS LATCH UP 15 3 1 Port Input Unused Pins 15 3 2 Latch up consideration switch 16 4 MINIMUM FLASH PROGRAMMING CONNECTION 20...

Page 5: ...et Up Introduction Fujitsu Microelectronics Europe GmbH 5 MCU AN 300033 E V13 0 Introduction This application note describes how to set up a hardware environment for Fujitsu FR MCUs As an example the MB91F467DA is used ...

Page 6: ...C VDD5 VSS HVSS HVDD5 32 768kHz 4MHz 12p 12p 10p 10p AVRL 5V 3V VDD35 MCU system PC connection 1 2 Serial Interface The PC connection section is only needed if no 5V external serial data lines for programming are existing The MAX232 is a standard level shifter which converts the 5V levels of the MCU to 12V RS232V24 levels and vice versa If you use a 3 3V MCU a MAX3232 is recommended Please conside...

Page 7: ...ection in a wide range Higher capacities and high impedance may cause latch up effects together with an INITX switch and low EMI protection If the device has no internal pull up resistor an external pull up resistor should be connected 1 6 VCC18C Pin A 4 7IF 10IF ceramics X7R capacitor must be connected to the C pin of the MCU This smooth capacitor is needed to stabilize the internal 1 8V core sup...

Page 8: ...settings for available operation modes Note 1 The Bootloader is only available for the Internal vector mode MD 210 000 Hence the programming of external Flash via Bootloader will be not supported by external vector mode For this reason the MD0 pin should be connected to a test point with pull up resistor to jump into the Bootloader 1 9 Unused IO Pins Please read Chapter 3 for how to proceed with u...

Page 9: ...e recommend a VSS ground plane on the mounting side just under the MCU For both VDD and VSS only one connection to the rest of the circuit should be done otherwise noise is carried over from and to the MCU Decoupling capacitors DeCaps has to be placed as nearest as possible to the related pins If they are placed too far away their function becomes useless If crystals are used they have to be place...

Page 10: ...e routed through VSS pin The following routing and placement for single sided metal layer is recommended Note that in all following illustrations the mounting metal layer is drawn in black and the back side metal layer in gray 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 th...

Page 11: ...bH 11 MCU AN 300033 E V13 The following routing and placement for single sided metal layer is recommended 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 ...

Page 12: ...wing placement and routing is recommended 2 5 Quartz Crystal Placement and Signal Routing The crystal has to be placed as nearest as possible to the MCU Therefore the oscillator capacitors have to be placed 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 ...

Page 13: ...in supply for external Bus buffer at 5V or 3 3V level VDD5R Main supply for the internal 1 8V regulator Note this pin shows the noise of the internal core supply VSS5 Main supply for IO buffer and MCU core close to the internal 1 8V regulator close to crystal oscillator VCC18C External smooth capacitor for internal 1 8V regulator output it is used for supply of the MCU core Note this pin leads the...

Page 14: ...lectronics Europe GmbH Pin name Function X0 X0A Oscillator input if not used so shall be connected to ground see please DS of related MCU series X1 X1A Oscillator output the crystal and bypass capacitor must be connected via shortest distance with X1 pin if not used so shall be open only if supported by device ...

Page 15: ...e of the MCU can happen Use the internal pull up down resistors if the port provides such function If not use external pull up or pull down resistors to define the input level If both solutions are not possible set the Port Pin to Output Never connect a potential divider with almost same resistor values Be careful with connection of input pins to other devices which can go into High Z states Alway...

Page 16: ... the device and temperature 3 2 Latch up consideration switch Be careful with external switches to VDD or ground together with debouncing capacitors connected to port pins A usual configuration is shown in the following schematic RPD is a pull down resistor and CBD a debouncing capacitor If the switch SW is open a 0 is read from the port pin Pxy If the switch is closed the input changes to 1 From ...

Page 17: ...he switch SW the circuit becomes a parallel oscillator with the wire inductivity LX the debouncing capacity CX and the damping RPD of the pull down resistor Assume the power supply to be ideal i e it has no internal resistance Because RPD is often chosen high 50 K Ohms its damping effect is weak This weakly attenuated oscillator causes voltage overshoots on the port pin drawn in red in the illustr...

Page 18: ... by DB X OSC C L f 2 1 The inductivity LX is the unknown value and depends on the PCB its routing and the wire lengths There are two counter measurements to prevent from latch up One solution is to decrease the capacity of the debouncing capacitor This increases the oscillation frequency and the over all energy of the overshoots is smaller big capacity small capacity This solution has two disadvan...

Page 19: ...lectronics Europe GmbH 19 MCU AN 300033 E V13 The series resistor RS reduces the amplitude of the oscillation and decreases the voltage offset at first The resistor must not be chosen too high so that the port pin input voltage VP is within the positive CMOS TTL Automotive level ...

Page 20: ...ART4 at 9600 Baud serial trigger But at first the boot loader is scanning for a falling edge at SCK4 If falling edge is detected at SCK4 the serial interface will be initialized for synchronous communication 4 2 Programming Pins For serial programming the following pins are affected 1 SIN4 serial input 2 SOT4 serial output 3 SCK4 clock input 4 INITX reset input After the MCU Reset the UART4 pins w...

Page 21: ...n unused SCK4 pin should be connected to external pull up or pull down resistor 2k 10k 4 4 Synchronous Programming The following schematic shows a possible configuration Programmer MB90F46x SOT4 INITX SIN4 1n 2k RESET 5V 3V 330R 330R SCK4 330R Figure 2 Serial synchronous programming interface For pin connection and pull up down resistors please refer to asynchronous programming Please note the SCK...

Page 22: ...ith external bus interface the external bus function will be set by reset independents on internal or external mode vector fetch In case of single chip mode the external bus function is active until any user program overwrites the related PFR s from external bus to GPIO function The initial values of external bus are configured as following GPIO XBUS Initial function Initial state P00 P03 D0 D31 X...

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