User Buttons; User Leds And Optional Lcd; Power Supply - Fujitsu MB88121 SERIES User Manual

SK-91F467-FLEXRAY V1.1
Introduction
Either the DTR line or the RTS line of X1, X4 or X8 connectors can be selected to generate
a system reset.
The LIN transceivers (TLE6259) generate the adequate levels to drive the bus line in LIN-
systems for automotive and industrial applications.
1.3.10 MCU Pins
All 208 pins of the microcontroller are connected to the edge connectors J1, J2, J3 and J4
and are directly available to the user.

1.3.11 User Buttons

There are four push buttons on board, which can be connected to input-ports of the
microcontroller. Some ports may support additional functions like external interrupts (INT0,
INT1 and INT2) and trigger for the Reload Timer or Input-Capture (TIN0 / ICU0). One
additional button is reserved as System-Reset-button to reset the MCU and the FLEXRAY
CC simultaneously, but it is possible to disconnect the RST-ports with JP52 or JP54.
It is possible to connect with Dip-switch S3 eight port input switches at S4 to the MCU port
P26_D0 – P26_D7. All eight ports can be switched separately to use e.g. only four ports as
input.

1.3.12 User LEDs and optional LCD

Sixteen user-LEDs are connected via two pull-down resistor networks to port P25_D0 -
P25_D7 and to port P16_D0 - P16_D7. Parallel to the LEDs on port P25, the connector J6
can be used to connect a standard alphanumeric display. The resistor networks RN2 and
RN3 can be removed, to free the ports.

1.3.13 Power Supply

The four on-board step-down switching regulators allow the user to connect an unregulated
DC input voltage between +9V to +12V (max. 2000mA) to the starter-kit. The switching
regulators provide the voltages of 5V (3A), 3.3V (3A), 2.5V (1,5A) and 1.8V (1,5A) on the
starter kit. These voltages give also the possibility, to connect an optional graphic-controller
starter kit to the board. The switching regulators are short circuit protected and provide a
thermal shutdown.
If the SK-91F467-FLEXRAY starter-kit is connected to the Fujitsu FlexRay FPGA-board it is
possible, that the power supply for the SK-91F467-FLEXRAY will be provided by the FPGA-
board and a power supply connection to the SK-91F467-FLEXRAY is not needed. For that
case the pins 14B, 15B and 16B of DIN 41612 VG48ABC connector X14 are used as
voltage input behind the SK-91F467-FLEXRAY on-board power switch, so that the power
switch on the FPGA board switches the whole system.
© Fujitsu Microelectronics Europe GmbH - 11 - FMEMCU-UG-910017-11