Freescale Semiconductor MPC5748G EVB, Руководство пользователя, Страница: 17 / 88

Communications & Memory Interfaces:
MPC5748G EVB User Guide, User Guide, Rev. 0, 08/2015
Freescale Semiconductor, Inc. 17
Pin No Function Connection Pin No Function Connection
31 MDO7 PL14 32 DAI1 ---
33 MDO8 PL15 34 DAI2 ---
35 GND GND 36 GND GND
37 MDO9 PM0 38 ARBREQ ---
39 MDO10 PM1 40 ARBGRT ---
41 GND GND 42 GND GND
43 MD011 PM2 44 MDO13 PM8
45 MDO12 PM7 46 MDO14 PM9
47 GND GND 48 GND GND
49 MDO15 PM10 50 N/C ---
6. Communications & Memory Interfaces:
This section details the communication interface and storage peripherals that are implemented on the
EVB.
6.1. CAN Interfaces (P14, P15, J14, J15)
The EVB incorporates two identical CAN interface circuits connected to MCU CAN0 and CAN1 using
MC33901 transceivers. Both transceivers are configured for high speed operation by pulling pin 8 to
GND via a 4.7K Ohm resistor. There are test points to allow the Select pin to be driven high if desired.
The MC33901 is pin compatible with other CAN transceivers supporting full CAN FD data rates.
For flexibility, the CAN transceiver I/O is connected to a standard 0.1” connector (P14 for CAN1 / P15
for CAN0) rather than using non standard DB9 connectors. The pinout of these headers is shown below
and is also detailed on the PCB silkscreen
Figure 9. CAN Physical Interface Connectors
The CAN0 and CAN1 MCU TX/RX signals are jumpered as shown in the table below to allow the
transceivers to be isolated from the respective MCU pin if desired. The default configuration is with all
jumper headers fitted routing the TX and RX signals to the MCU.
H L GND
1
The CAN Physical
interface circuits are
located on the left
edge of the EVB