Instructions

DO0281R00 33 / 58

Filtering by IP4 and setting the

external output

Example: You want to filter by protocol type IPv4 and set the external output if a

frame with protocol type IPv4 arrives.

Protocol type IPv4 corresponds to 0x0800.

Set the following filter registers:

SegFilter1:

x07 00 00 00 03 Word offset of protocol type

x08 00 00 00 08 IPv4 protocol type

x09 00 00 FF FF Mask on 2 bytes

Filter 1

x55 00 00 00 00 No negation of SegFilter1

x56 00 00 00 01 Filter1 consists of SegFilter1

Uplink

x65 00 00 00 00 Do not invert output

x66 00 00 00 00 Frame is output at the uplink port if filter 1 applies.

External output

x67 00 00 00 00 No negation of ext. out

x68 00 00 00 01 Set external output if filter 1 applies

ConfigReg

401 xx xx xx xE Activate filter for CON A port (1110)

extOut_ConfigReg

402 00 00 01 01 Port Con A active, reset via a timer

extOutTimerReg

403 01 31 2D 00 Timer resets the value every 200ms

Filtering by CRC error

Example: You want to filter all frames that report a CRC error.

Set the following filter registers:

State:

x05 08 00 00 00 CRC Error Statusbit

x06 FF 00 00 00 Mask on 1 byte

Filter 1

x55 00 00 00 00 No negation of StateFilter

x56 80 00 00 00 Filter1 consists of state filter

Uplink

x65 00 00 00 00 Do not invert output

x66 00 00 00 01 Frame is output at the uplink port if filter 1 applies.

ConfigReg

401 xx xx xx xE Activate filter for CON A port (1110)

Filters