HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 300

• Manufacturer Part Number: HD6417618
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 12 Ethernet Controller Direct Memory Access Controller (E-DMAC)
Rev. 6.00 Jun. 12, 2007 Page 268 of 610
REJ09B0131-0600
Bit
18
17
16
15 to 12
11
10
9
Bit Name
FR
RDE
RFOF

CND
DLC
CD
Initial
value
0
0
0
All 0
0
0
0
R/W
R/W
R/W
R/W
R
R/W
R/W
R/W
Description
Frame Reception
Indicates that a frame has been received and the
receive descriptor has been updated. This bit is set to
1 each time a frame is received.
0: Frame not received
1: Frame received
Receive Descriptor Empty
When receive descriptor empty (RDE = 1) occurs,
receiving can be restarted by setting RACT = 1 in the
receive descriptor and initiating receiving.
0: Receive descriptor active bit RACT = 1 not
1: Receive descriptor active bit RACT = 0 detected
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.
Carrier Not Detect
Indicates the carrier detection status.
0: A carrier is detected when transmission starts
1: A carrier is not detected when transmission starts
Detect Loss of Carrier
Indicates that loss of the carrier has been detected
during frame transmission.
0: Loss of carrier not detected
1: Loss of carrier detected
Delayed Collision Detect
Indicates that a delayed collision has been detected
during frame transmission.
0: Delayed collision not detected
1: Delayed collision detected
detected