RM0082
HS_Media independent interface (MII)
Doc ID 018672 Rev 1
535/844
●
WD
Setting this bit, the MAC disables the watchdog timer on the receiver. Otherwise, MAC
allows no more than 2048 bytes (10240 bytes, if JE bit in this register is set) of the
receiving frame and cuts off any bytes received after that.
●
JD
Setting this bit, the MAC disables the jabber timer on the transmitter. Otherwise, MAC
cuts off the transmitter if the application sends out more than 2048 bytes (10240 bytes,
if JE bit in this register is set) of data during transmission.
●
JE
Setting this bit, the MAC allows Jumbo frames of size 9018 bytes (9022 bytes for VLAN
tagged frames) without reporting a giant frame error in the receive frame status.
Note:
JD bit in this register should be set in order to transmit jumbo frames.
●
IFG
Note:
This 3 bit field controls the minimum inter frame gap between frames during transmission,
according to encoding below:
Table 443.
MAC configuration register bit assignments
Bit
Name
Reset Value
Type
Description
[31:24]
Reserved
-
RO
Read: undefined
[23]
1’h0
RW
Watchdog Disable.
[22]
1’h0
RW
Jabber Disable.
[21]
Reserved
-
RO
Read: undefined.
[20]
1’h0
RW
Jumbo Frame Enable.
[19:17]
3’h0
RW
Inter Frame Gap.
[16]
1’b0
RW
Disable Carrier Sense During Transmission
[15]
Reserved
-
RO
Read: undefined.
[14]
Reserved
-
RO
Read: undefined.
[13]
1’h0
RW
Disable Receive Own.
[12]
1’h0
RW
Loop-back Mode.
[11]
1’h0
RW
Duplex Mode.
[10]
1’h0
RW
Checksum Offload.
[09]
1’h0
RW
Disable Retry.
[08]
Reserved
Reserved
[07]
1’h0
RW
Automatic Pad/CRC Stripping.
[06:05]
2’h0
RW
Back-off Limit.
[04]
1’h0
RW
Deferral Check.
[03]
1’h0
RW
Transmitter Enable.
[02]
1’h0
RW
Receiver Enable.
[01:00]
Reserved
-
RO
Read: undefined.