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Device Overview
MFR4200 Data Sheet, Rev. 0
40
Freescale Semiconductor
2.2.3.12
RXD_BG[1:2]/RXD[1:2]_485 — PHY Received Data, RS485 Received Data
The function of this pin is selected by the SCM[0:1] bits in the MCR0 register. Refer to
Section 3.2.3.2.1,
“Module Configuration Register 0 (MCR0)
” for more information. The pins can be configured to enable
or disable either pullup or pulldown resistors on the pins.
RXD_BG[1:2] are bus driver receive data input signals if the FlexRay Optical/Electrical PHY is
configured:
RXD_BG1 is the input to the CC from Physical Layer Channel 1.
RXD_BG2 is the input to the CC from Physical Layer Channel 2.
RXD[1:2]_485 are bus driver receive data input signals if the RS485 Driver type is configured:
RXD1_485 is the input to the CC from Physical Layer Channel 1
RXD2_485 is the input to the CC from Physical Layer Channel 2.
2.2.3.13
TXEN[1:2]#/TXE[1:2]_485# — PHY Transmit Enable, RS485 Transmit
Enable
TXEN[1:2]# are bus driver transmit enable output signals if the FlexRay Optical/Electrical PHY is
configured:
TXEN1# is the output of the CC to Physical Layer Channel 1
TXEN2# is the output of the CC to Physical Layer Channel 2.
TXE[1:2]_485# are Bus Driver Transmit Enable output signals if the RS485 Driver type is configured:
TXE1_485# is the output of the CC to the Physical Layer Channel 1.
TXE2_485# is the output of the CC to the Physical Layer Channel 2.
Refer to
Figure 2-10
for an example RS485 bus driver connection using external glue logic.
The pins can be configured to provide either high or reduced output drive.
2.2.3.14
TXD_BG1/TXD1_485/ IF_SEL1 — PHY Transmit Data 1, RS485 Transmit
Data 1, Host Interface Selection 1
The function of this pin is selected by the SCM[0:1] bits in the MCR0 register. Refer to
Section 3.2.3.2.1,
“Module Configuration Register 0 (MCR0)
” for more information. The pins can be configured to provide
either high or reduced output drive.
TXD_BG[1:2] are bus driver transmit data output signals if the FlexRay Optical/Electrical PHY is
configured:
TXD_BG1 is the output of the CC to Physical Layer Channel 1
TXD_BG2 is the output of the CC to Physical Layer Channel 2.
TXD[1:2]_485 are bus driver transmit data output signals if the RS485 Driver type is configured:
TXD1_485 is the output of the CC to Physical Layer Channel 1.
TXD2_485 is the output of the CC to Physical Layer Channel 2.