NXP Semiconductors freescale MPC5668E, User Manual, Page: 22 / 54

MPC5668EVB Users Manual Rev 0.1 May 2009
MPC5668EVBUM/D Page 18 of 29
The Flexray circuitry is
located in the top edge of
the EVB in an area titled
“Flexray”
3.8 FlexRAY Configuration
(J19, J27, J25, J26, J28)
The EVB is fitted with 2 FlexRAY physical interfaces connected to MCU FlexRAY channels A and B. Jumpers
J19 and J27 are provided to route the respective MCU signals to the physical interfaces as described below.
Table 3-17 Flexray MCU Signal Routing Jumpers (J19, J27)
Jumper Position PCB
Legend
Description
J19 (Flex-A)
Posn 1-2
FITTED (D)
TX
MCU PK4 is connected to Flexray A transceiver TX
REMOVED MCU PK4 is not connected to Flexray A transceiver TX
J19 (Flex-A)
Posn 3-4
FITTED (D)
TXEN
MCU PK5 is connected to Flexray A transceiver TXEN
REMOVED MCU PK5 is not connected to Flexray A transceiver TXEN
J19 (Flex-A)
Posn 5-6
FITTED (D)
RX
MCU PK3 is connected to Flexray A transceiver RX
REMOVED MCU PK3 is not connected to Flexray A transceiver RXEN
J27 (Flex-B)
Posn 1-2
FITTED (D)
TX
MCU PK7 is connected to Flexray B transceiver TX
REMOVED MCU PK7 is not connected to Flexray B transceiver TX
J27 (Flex-B)
Posn 3-4
FITTED (D)
TXEN
MCU PK8 is connected to Flexray B transceiver TXEN
REMOVED MCU PK8 is not connected to Flexray B transceiver TXEN
J27(Flex-B)
Posn 5-6
FITTED (D)
RX
MCU PK6 is connected to Flexray B transceiver RX
REMOVED MCU PK6 is not connected to Flexray B transceiver RXEN
The power to the Flexray physical interface is controlled via jumper J25 to allow disconnection if required. The
Flexray physical interface is capable of interfacing with MCU I/O voltages of 3.3V or 5.0V as defined by the
voltage supplied VDDE2 via jumper J42.
Table 3-18 Flexray Power Control Jumpers (J25)
Jumper Position PCB
Legend Description
J25 (Flex-PWR)
Posn 1-2
FITTED (D)
12V
12V Flexray circuitry is powered from main 12V input
REMOVED 12V Flexray circuitry is not powered
J25 (Flex-PWR)
Posn 3-4
FITTED (D)
5V
5V Flexray circuitry is powered from 5.0V switching reg
REMOVED 5V Flexray circuitry is not powered
J25 (Flex-PWR)
Posn 5-6
FITTED (D)
VIO
VIO Flexray circuitry is powered from VDDE2
REMOVED VIO Flexray circuitry is not powered
The flexray interface has 4 pins which are used for configuration and are pulled high or low controlled by a
jumper as described in the table below. By default, all of the jumper headers are fitted. Please consult the
Flexray physical interface specification before changing any of these jumpers.