Datasheet

SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
1222
43.7.2 Network Configuration Register
Name: GMAC_NCFGR
Address: 0x40034004
Access: Read/Write
 SPD: Speed
Set to logic one to indicate 100 Mbps operation, logic zero for 10 Mbps.
 FD: Full Duplex
If set to logic one, the transmit block ignores the state of collision and carrier sense and allows receive while transmitting.
 DNVLAN: Discard Non-VLAN FRAMES
When set only VLAN tagged frames will be passed to the address matching logic.
 JFRAME: Jumbo Frame Size
Set to one to enable jumbo frames up to 10240 bytes to be accepted. The default length is 10240 bytes.
 CAF: Copy All Frames
When set to logic one, all valid frames will be accepted.
 NBC: No Broadcast
When set to logic one, frames addressed to the broadcast address of all ones will not be accepted.
 MTIHEN: Multicast Hash Enable
When set, multicast frames will be accepted when the 6-bit hash function of the destination address points to a bit that is
set in the Hash Register.
 UNIHEN: Unicast Hash Enable
When set, unicast frames will be accepted when the 6-bit hash function of the destination address points to a bit that is set
in the Hash Register.
 MAXFS: 1536 Maximum Frame Size
Setting this bit means the GMAC will accept frames up to 1536 bytes in length. Normally the GMAC would reject any frame
above 1518 bytes.
31 30 29 28 27 26 25 24
– IRXER RXBP IPGSEN – IRXFCS EFRHD RXCOEN
23 22 21 20 19 18 17 16
DCPF DBW CLK RFCS LFERD
15 14 13 12 11 10 9 8
RXBUFO PEN RTY – – – MAXFS
76543210
UNIHEN MTI HEN NBC CAF JFRAME DNVLAN FD SPD