• Human readable and editable configuration data file stored on microSD/microSDHC card
• Each CAN channel can be assigned individual IP addresses and port numbers for host communication
• DHCP client functionality
• UDP/IP support with configurable MAC addresses, IP addresses and port numbers
• RJ-45 connector with link and activity LEDs
• Configurable 10/100/1000 BaseT Ethernet
• Integrated MAC and PHY
• Full-duplex network communication module
Ethernet Interface Features
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PMC825 Ethernet /UDP Interface
16 bits
Data Area
Data Area
Message Count Service/Response Code
Operation Code
Frame Counter (bits 0-15)
Frame Counter (bits 16-31)
Packet Type (0x0001)
Issue P (23/8/10)
• Packet Type: Identifies packet structure, set to 0x0001 (fixed value) • Frame Counter: 32-bit unsigned integer, incremented for each packet • Operation Code: 16-bit signed integer, indicating packet content and structure: a.) CAN_NOOP = 0 b.) CAN_WRITE = 1 c.) CAN_READ = 2 d.) CAN_CTRL = 3 e.) CAN_WRITE_RSP = 4 f.) CAN_READ_RSP = 5 g.) CAN_CTRL_RSP = 6 h.) CAN_STATUS = 7 • Message Count, Service/Response Code: Operation Code dependant parameter • Data Area: Packet data area of variable length between 2 and 1402 Bytes.
General UDP Packet Structure
8-byte header max. 1402 Bytes
page 3 of 27
PMC825 Ethernet /UDP Interface
16 bits
CAN Message #n
CAN Message #1
CAN Message #0
Message Count
CAN_WRITE (0x0001)
Frame Counter (bits 0-15)
Frame Counter (bits 16-31)
Packet Type (0x0001)
Issue P (23/8/10)
• Packet Type: 0x0001 • Frame Counter: 32-bit unsigned integer, incremented for each packet • Operation Code: a.) CAN_WRITE = 1 b.) CAN_READ = 2 • Message Count: Variable number of CAN messages in this packet with 1 = n
