MX98725 Ver la hoja de datos (PDF) - Macronix International
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MX98725 Datasheet PDF : 33 Pages
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MX98725
Field
12
Name
FC
11:10 LOM
9
FD
7
PM
6
PR
5
SB
4
IF
3
PB
2
HO
1
SR
0
HP
Description
Force Collision Mode, used in collision logic test in internal loopback mode, set to force
collision during next transmission attempt. This can result in excessive collision reported in
TDES0<8> if 16 or more collision.
Loopback Operation Mode, see table.
Full-Duplex Mode, set for simultaneous transmit and receive operation, heartbeat check is
disabled, TDES0<7> should be ignored, and internal loopback is not allowed.
This bit controls the value of bit 6 of link code word .
Pass All Multicast, set to accept all incoming frames with a multicast des tination address
are received. Incoming frames with physical address are filtered according to the CSR6<0>
bit.
Promiscuous Mode, any incoming valid frames are accepted, default is reset and not
affected by software reset.
Start/Stop Backoff Counter, when reset, the backoff timer is not affected by the network
carrier activity. Otherwise, timer will start counting when carrier drops.
Inverse Filtering, read only bit, set to operate in inverse filtering mode, only valid during
perfect filtering mode.
Pass Bad Frames, set to pass bad frame mode, all incoming frames passed the address
filtering are accepted including runt frames, collided fragments, truncated frames caused
by FIFO overflow.
Hash-Only Filtering Mode , read only bit, set to operate in imperfect filtering mode for both
physical and multicast addresses.
Start/Stop Receive, set to place receive process in running state where descriptor
acquisition is attempted from current position in the receive list. Reset to place the receive
process in stop state.
Hash/Perfect Receive Filtering Mode, read only bit, set to use hash table to filter multicast
incoming frames. If CSR6<2> is also set, then the physical adresses are imperfect address
filtered too. If CSR6<2> is reset, then physical addresses are perfect address filtered,
according to a single physical address as specified in setup frame.
P/N:PM0488
REV. 1.7, SEP. 15, 1998
18
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