Datasheet

SAM9G20
DS60001516A-page 614  2017 Microchip Technology Inc.
RTY: Retry test
Must be set to zero for normal operation. If set to one, the back off between collisions is always one slot time. Setting this bit to one helps
testing the too many retries condition. Also used in the pause frame tests to reduce the pause counters decrement time from 512 bit times,
to every rx_clk cycle.
PAE: Pause Enable
When set, transmission pauses when a valid pause frame is received.
RBOF: Receive Buffer Offset
Indicates the number of bytes by which the received data is offset from the start of the first receive buffer.
RLCE: Receive Length field Checking Enable
When set, frames with measured lengths shorter than their length fields are discarded. Frames containing a type ID in bytes 13 and 14 —
length/type ID = 0600 — are not be counted as length errors.
DRFCS: Discard Receive FCS
When set, the FCS field of received frames are not be copied to memory.
EFRHD:
Enable Frames to be received in half-duplex mode while transmitting.
IRXFCS: Ignore RX FCS
When set, frames with FCS/CRC errors are not rejected and no FCS error statistics are counted. For normal operation, this bit must be
set to 0.
RBOF Offset
00 No offset from start of receive buffer
01 One-byte offset from start of receive buffer
10 Two-byte offset from start of receive buffer
11 Three-byte offset from start of receive buffer