Details Of Differences; Maximum Operating Frequency; Flexray Port 31 - Fujitsu MB91F465XA Application Note

Chapter 3 Differences between MB91F465XA and Emulation System

3.2 Details of differences

3.2.1 Maximum operating frequency

The maximum operating frequency of the emulation device MB91V460A is 80MHz. Do not
set higher PLL frequencies! The MB91F465XA series has a maximum operating frequency
of 100MHz.
By using the Emulator take care that the PLL frequency should not exceed 80MHz. The PLL
options can be set in the file start91460.asm (See Chapter 4.7.1 Clock Selection in
start91460.asm file).
For further details refer to MB91460A series Hardware Manual and MB91F465XA series
Datasheet.

3.2.2 FlexRay port 31

Each pin of the MCU is shared by general I/O port function and peripheral function. Via the
Port Function Register (PFR) the pin function is specified.
MB91F465XA:
Port 31 must be set to peripheral function (PFR=1), otherwise the FlexRay functionality is
not connected to the pins.
Recommended FlexRay port settings:
1. Channel A
TXDA: FlexRay Channel A Transmit (P31_0). To enable TXDA set PFR31_0 = 1 and EPFR31_0 = 1
TXENA: FlexRay Channel A Enable (P31_1). To enable TXENA set PFR31_1 = 1 and EPFR31_1 = 1
RXDA: FlexRay Channel A Receive (P31_2). To enable RXDA set PFR31_2 = 1 and EPFR31_2 = 1
2. Channel B
TXDB: FlexRay Channel B Transmit (P31_4). To enable TXDB set PFR31_4 = 1 and EPFR31_4 = 1
TXENB: FlexRay Channel B Enable (P31_5). To enable TXENB set PFR31_5 = 1 and EPFR31_5 = 1
RXDB: FlexRay Channel B Receive (P31_6). To enable RXDB set PFR31_6 = 1 and EPFR31_6 = 1
The muster:
EPFR31 = 0x77;
PFR31 = 0x77;
DDR31 = 0x77;
Emulation system:
The FlexRay functionality is always available at port 31. It is not possible to use the general
I/O Port function.
For further details refer to MB91460A series Hardware Manual and MB91F465XA series
Datasheet.
© Fujitsu Microelectronics Europe GmbH
MB91F465XA EMULATION
/* output mode */
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