95
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit name
RX_EXT_
RX_TYPE_
RX_EHEC
RX_THEC
RX_TYPE
RX_SPARE
RX_DP_
RX_SP_
HDR_REM HDR_REM
_CHECK_
_CHECK_
CHECK_
_CHECK
CHECK_
CHECK_
_INH
_INH
INH
INH
INH
_INH
INH
INH
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Value
0
0
0
0
0
0
0
0
reset
ADDR = 0x1CE: GFP Mode
Bit 7:
RX_EXT_HDR_REM_INH
is set for GFP null headers. When set, the GFP Payload begins right
after the tHEC field. When cleared, the four bytes after the tHEC are the Linear Extended Header.
Bit 6:
RX_TYPE_HDR_REM_INH
is set to inhibit the removal of the received Type Header for test
purposes. When set, this field is prepended to the MAC Payload. When cleared, this field is not
forwarded through the MII interface.
Bits 5:
RX_EHEC_CHECK_INH
is set to inhibit the checking of the received eHEC field.
Bits 4:
RX_THEC_CHECK_INH
is set to inhibit the checking of the received tHEC field.
Bits 3:
RX_TYPE_CHECK_INH
is set to inhibit the checking of the received Type field.
Bits 2:
RX_SPARE_CHECK_INH
is set to inhibit the checking of the received Spare field.
Bits 1:
RX_DP_CHECK_INH
is set to inhibit the checking of the received DP field.
Bits 0:
RX_SP_CHECK_INH
is set to inhibit the checking of the received SP field.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit name RX_SPARE[7:0]
R/W
R/W
Value
0x00
after
reset
ADDR = 0x1CF: Receive Spare Field Byte
Bits 7-0:
RX_SPARE[7:0]
specifies the expected Spare Field when in GFP mode. If
RX_SPARE_CHECK_INH is not set, frames with a non-matching Spare Field are discarded and the
Form/Dest Error counter is incremented.