Fujitsu MOTORKIT-91F267-MC Manuel de l'utilisateur - Page 7

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MotorKit-91F267-MC User Guide

This board must only be used for test applications

in an evaluation laboratory environment.

1.3 General Description

The MotorKit-91F267-MC supports the 32bit MB91F267(N) Flash microcontroller.

The board is supplied with a socketed 4MHz crystal as the main oscillation clock. Using the

internal PLL of the µC, internal clock rates up to 32MHz can be achieved.

Two separate RS232 transceivers are available to connect two on-chip UARTs to 9-pin D-

Sub connectors (X1, X2). The transceivers generate the adequate RS232 levels for the

receive (RXD) and transmit (TXD) lines. The DTR line can be selected with jumpers (JP17,

JP19) to generate a system reset. The RTS signal can be shortcut to CTS using the jumpers

JP5 and JP26. The signals to and from the UART interfaces can be galvanically isolated by

optocouplers and a separate supply by a DC-DC converter to avoid interference with a host

PC.

In-circuit-programming (asynchronous) can be done via UART0 (X1) using the burn-in

bootloader of the microcontroller.

One CAN transceiver is available to integrate the board in a Controller Area Network. The

CAN interface can be opto-isolated or connected to the MCU directly independently of the

UART interfaces.

All pins of the microcontroller (except oscillator pins X1 and X0) are connected to the pin

headers J1-J4 and are directly available to the user. Furthermore, the most important signals

like voltage and current measurements are available on separate pin headers.

The on-board voltage regulators allow the user to configure the board to fit a variety of

situations. The board includes a 15V-regulator for the gate drivers, as well as a 5V-regulator

for the MCU and logic supply. The 15V regulator can be bypassed (JP20) if the source input

voltage is in the range of 10-20V. The 5V regulator can use a separate 8-15V input or use

the gate drive supply as regulator input. Also, solder jumpers (JP29 and JP63) can be set to

supply the DC bus from the logic power supply input (X6), e.g. when using a small motor

(<3A).

There are seven push button switches on the board, which can be connected to input pins of

the microcontroller. SW1 (NMI) can be connected to the NMI pin. SW2-SW5 can be

connected to various I/O pins of the MCU. Additionally, by setting JP7, all buttons can trigger

the external interrupt 7, which is normally connected only to SW2 ('wired-OR'). This allows

reading all buttons in a single ISR and saves external interrupt pins. SW6 is the system reset

button, and SW7 triggers the fault input pin (DTTI) of the MCU, which can shut down the

PWM output in case of over-current or over-voltage.

Eight user-LEDs are connected via a 1K pull-up resistor network to Port P00-P07. If these

LEDs are not required, the resistor network can be removed to disconnect the LEDs and free

the port.

The operating mode of the microcontroller (Program / Run) is selected by JP18.

The board provides current and voltage measurement circuits for the motor phases and the

DC bus which are connected to the ADC of the microcontroller. The signal conditioning

circuit fits a variety of applications. Some applications might require a faster or slower

filtering e.g. of the voltage measurement; this can be done by changing R/C values or

adding capacitors in the current measurement circuit (e.g. C70, C72, C75, C77).

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