MC56F8323EVM Freescale Semiconductor, MC56F8323EVM Datasheet - Page 39

• Manufacturer Part Number: MC56F8323EVM
• Description: KIT EVALUATION FOR MC56F8323
• Manufacturer: Freescale Semiconductor
• Type: DSPr

Specifications of MC56F8323EVM

• Contents: Module and Misc Hardware
• Processor To Be Evaluated: MC56F8322 and MC56F8323
• Data Bus Width: 16 bit
• Interface Type: RS-232
• For Use With/related Products: MC56F8322, MC56F8323
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2.10 CAN Interface
The 56F8323EVM board contains a CAN physical-layer interface chip that is attached to the
FlexCAN port’s CAN_RX and CAN_TX pins on the 56F8323. The EVM board uses a Philips
high-speed, 1.0Mbps, physical layer interface chip, PCA82C250. Due to the +5.0V operating
voltage of the CAN interface chip, a pull-up to +5.0V is required to level shift the Transmit Data
output line from the 56F8323. The CAN_TX and CAN_RX signals from the processor can be
isolated by the connector at JG15; see
inductors before attaching to the CAN bus connectors. A primary, J12, and daisy chain, J13,
CAN connectors are provided to allow easy daisy chaining of CAN devices. CAN bus
termination of 120 ohms can be provided by adding a jumper to JG10. Refer to
the CAN connector signals and to
Freescale Semiconductor
Preliminary
56F8323
Pin #
CAN_RX
CAN_TX
1
3
Table 2-12. CAN Signal Isolation Jumper Options
JG15
3
1
2
4
CAN_RX
CAN_TX
Signal
Figure 2-10. CAN Interface
1K
Figure 2-10
+5.0V
Technical Summary, Rev. 2
Table
CAN Transceiver
PCA82C250T
TXD
RXD
CANH
CANL
2-12. The CANH and CANL signals pass through
JG15
for a connection diagram.
Pin #
2
4
CAN_RX from CAN Transceiver
CAN_TX to CAN Transceiver
120
Signal
J13
4
3
J12
4
3
5
5
JG10
1
2
Daisy Chain CAN
Terminator
CAN Bus
Connector
Table 2-13
CAN Bus
Connector
CAN Interface
for
2-21