PXR40RM Datasheet, PDF (590/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

FlexRay Communication Controller (FLEXRAY)
22.1.6.2.1 Enter Normal Mode
This mode is entered when the application requests the controller 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 Section 22.7.1.2, 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.
22.2 External Signal Description
This section lists and describes the controller signals, connected to external pins. These signals are
summarized in Table 22-2 and described in detail in Section 22.2.1, 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.
Table 22-2. External Signal Properties
Name
FR_A_RX
FR_A_TX
FR_A_TX_EN
FR_B_RX
FR_B_TX
FR_B_TX_EN
FR_DBG[0]
FR_DBG[1]
FR_DBG[2]
FR_DBG[3]
Direction
Input
Output
Output
Input
Output
Output
Output
Output
Output
Output
Active
—
—
Low
—
—
Low
—
—
—
—
Reset
—
1
1
—
1
1
0
0
0
0
Function
Receive Data Channel A
Transmit Data Channel A
Transmit Enable Channel A
Receive Data Channel B
Transmit Data Channel B
Transmit Enable Channel B
Debug Strobe Signal 0
Debug Strobe Signal 1
Debug Strobe Signal 2
Debug Strobe Signal 3
22.2.1 Detailed Signal Descriptions
This section provides a detailed description of the controller signals, connected to external pins.
22.2.1.1 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.
22.2.1.2 FR_A_TX — Transmit Data Channel A
The FR_A_TX signal carries the transmit data for channel A to the corresponding FlexRay bus driver.
22-6
PXR40 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor