MC9S12XF512_1 Datasheet, PDF (463/1306 Pages) Freescale Semiconductor, Inc – S12X Microcontrollers

Chapter 13 FlexRay Communication Controller (FLEXRAY)
Subsequently the application can reconfigure and/or reintegrate the FlexRay node into the FlexRay cluster.
13.2 External Signal Description
This section lists and describes the FlexRay block signals, connected to external pins. These signals are
summarized in Table 13-2 and described in detail in Section 13.2.1, “Detailed Signal Descriptions”.
NOTE
The off chip signals RXD_A, TXD_A, and TXE_A are available on each
package option. The availability of the other off chip signals depends on the
package option.
Table 13-2. External Signal Properties
Name
RXD_A
TXD_A
TXE_A
RXD_B
TXD_B
TXE_B
STB0
STB1
STB2
STB3
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
13.2.1 Detailed Signal Descriptions
This section provides a detailed description of the FlexRay block signals, connected to external pins.
13.2.1.1 RXD_A — Receive Data Channel A
The RXD_A signal carries the receive data for channel A from the corresponding FlexRay bus driver.
13.2.1.2 TXD_A — Transmit Data Channel A
The TXD_A signal carries the transmit data for channel A to the corresponding FlexRay bus driver.
13.2.1.3 TXE_A — Transmit Enable Channel A
The TXE_A signal indicates to the FlexRay bus driver that the FlexRay block is attempting to transmit
data on channel A.
13.2.1.4 RXD_B — Receive Data Channel B
The RXD_B signal carries the receive data for channel B from the corresponding FlexRay bus driver.
MC9S12XF - Family Reference Manual, Rev.1.19
Freescale Semiconductor
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