FlexRay Communication Controller (FLEXRAY)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
30-6
Freescale Semiconductor
Preliminary
30.1.6.2
Normal Mode
In this mode the FlexRay block is fully functional. The FlexRay block indicates that it is in normal mode
by asserting the module enable bit MEN in the
Module Configuration Register (MCR)
30.1.6.2.1
Enter Normal Mode
This mode is entered when the application requests the FlexRay block to leave the disabled mode. If the
normal mode was entered by leaving the disabled mode, the application has to perform the protocol
initialization described in
30.7.1.2, “Protocol Initialization
” to achieve full FlexRay functionality.
Depending on the values of the SCM, CHA, and CHB bits in the
Module Configuration Register (MCR)
,
the corresponding FlexRay bus driver ports are enabled and driven.
30.2
External Signal Description
This section lists and describes the FlexRay block signals, connected to external pins. These signals are
summarized in
Section 30.2.1, “Detailed Signal Descriptions.”
NOTE
The off-chip signals FR_A_RX, FR_A_TX, and FR_A_TX_EN are
available on each package option. The availability of the other off-chip
signals depends on the package option.
30.2.1
Detailed Signal Descriptions
This section provides a detailed description of the FlexRay block signals, connected to external pins.
30.2.1.1
FR_A_RX — Receive Data Channel A
The FR_A_RX signal carries the receive data for channel A from the corresponding FlexRay bus driver.
Table 30-2. External Signal Properties
Name
Direction
Active
Reset
Function
FR_A_RX
Input
—
—
Receive Data Channel A
FR_A_TX
Output
—
1
Transmit Data Channel A
FR_A_TX_EN
Output
Low
1
Transmit Enable Channel A
FR_B_RX
Input
—
—
Receive Data Channel B
FR_B_TX
Output
—
1
Transmit Data Channel B
FR_B_TX_EN
Output
Low
1
Transmit Enable Channel B
FR_DBG[0]
Output
—
0
Debug Strobe Signal 0
FR_DBG[1]
Output
—
0
Debug Strobe Signal 1
FR_DBG[2]
Output
—
0
Debug Strobe Signal 2
FR_DBG[3]
Output
—
0
Debug Strobe Signal 3