r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 980

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

Section 23 Gigabit Ethernet Controller (GETHER)
Rev. 1.00 Oct. 01, 2007 Page 914 of 1956
REJ09B0256-0100
Bit
16
15 to 11
10
9
8
7
6
Bit Name
RFOF

DLC
CD
TRO
RMAF
CEEF
Initial
Value
0
All 0
0
0
0
0
0
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
Description
Receive FIFO Overflow
Indicates that the receive FIFO has overflowed during
frame reception.
0: Overflow has not occurred
1: Overflow has occurred
Reserved
These bits are always read as 0. The write value should
always be 0.
Detect Loss of Carrier
Indicates that loss of the carrier has been detected
during frame transmission.
0: Loss of carrier has not been detected
1: Loss of carrier has been detected
Delayed Collision Detect
Indicates that a delayed collision has been detected
during frame transmission.
0: Delayed collision has not been detected
1: Delayed collision has been detected
Transmit Retry Over
Indicates that a retry-over condition has occurred
during frame transmission. Total 16 transmission retries
including 15 retries based on the back-off algorithm
have failed after the E-MAC transmission starts.
0: Transmit retry-over condition not detected
1: Transmit retry-over condition detected
Receive Multicast Address Frame
0: Multicast address frame has not been received
1: Multicast address frame has been received
Carrier Extension Error
Indicates that a carrier extension error has occurred
during frame reception in 1-Gigabit/half-duplex transfer.
0: Carrier extension error has not occurred
1: Carrier extension error has occurred