FlexRay Module (FLEXRAYV4)
MFR4310 Reference Manual, Rev. 2
64 Freescale Semiconductor
3.2 External Signal Description
This section lists and describes the FlexRay module signals, connected to external pins. These signals are
summarized in Table 3-2 and described in detail in Section 3.2.1, “Detailed Signal Descriptions”.
NOTE
The off chip signals RXD_BG1, TXD_BG1, and TXEN1# are available on
each package option. The availability of the other off chip signals depends
on the package option.
3.2.1 Detailed Signal Descriptions
This section provides a detailed description of the FlexRay module signals, connected to external pins.
3.2.1.1 EXTAL/CLK_CC — External Protocol Engine Clock
The EXTAL/CLK_CC signal carries the 40 MHz clock source signal for the Protocol Engine clock.
3.2.1.2 RXD_BG1 — Receive Data Channel A
The RXD_BG1 signal carries the receive data for channel A from the corresponding FlexRay bus driver.
3.2.1.3 TXD_BG1 — Transmit Data Channel A
The TXD_BG1 signal carries the transmit data for channel A to the corresponding FlexRay bus driver.
3.2.1.4 TXEN1# — Transmit Enable Channel A
The TXEN1# signal indicates to the FlexRay bus driver that the FlexRay module is attempting to transmit
data on channel A.
Table 3-2. External Signal Properties
Name Direction Active Reset Function
EXTAL/CLK_CC Input — — External Protocol Engine Clock
RXD_BG1 Input — — Receive Data Channel A
TXD_BG1 Output — 1 Transmit Data Channel A
TXEN1# Output Low 1 Transmit Enable Channel A
RXD_BG2 Input — — Receive Data Channel B
TXD_BG2 Output — 1 Transmit Data Channel B
TXEN2# Output Low 1 Transmit Enable Channel B
DBG0 Output — 0 Debug Strobe Signal 0
DBG1 Output — 0 Debug Strobe Signal 1
DBG2 Output — 0 Debug Strobe Signal 2
DBG3 Output — 0 Debug Strobe Signal 3
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