參數(shù)資料
型號(hào)： TC3299A
廠商： Electronic Theatre Controls, Inc.
英文描述： Ethernet PCMCIA Controller + COMBO Transceiver
中文描述： PCMCIA控制器組合以太網(wǎng)收發(fā)器
文件頁(yè)數(shù)： 17/26頁(yè)
文件大?。?/td> 1301K
代理商： TC3299A
TC3299A
Preliminary Data Sheet
Bit
Symbol
Description
LB1 LB0
Mode0 0 0 Normal Operation (LPBK=0)
Mode1 0 1 Internal Loopback (LPBK=0)
Mode2 1 0 External Loopback (LPBK=1)
Mode3 1 1 External Loopback (LPBK=0)
Auto Transmit Disable: This bit allows another station to disable the
EPCC
'
S transmitter by transmission of a particular multicast packet. The
transmitter can be re-enabled by resetting this bit or by reception of a
second particular multicast packet.
0: Normal Operation
1: Reception of multicast address hashing to 62 bit disables transmitter,
reception of multicast address hashing to bit 63 enables transmitter.
Collision Offset Enable: This bit modifies the back off algorithm to allow
prioritization of nodes.
0: Backoff Logic implements normal algorithm.
1: Forces Backoff algorithm modification to 0 to 2
mim(3+n,10)
slot times for first
three collisions, Then follows standard backoff. (For first three collisions
station has higher average backoff delay making a low priority mode.)
Reserved
Reserved
Reserved
D3
ATD
D4
OFST
D5
D6
D7
-
-
-
Transmit Status Register (TSR)
This register records events that occur on the media during transmission of a packet. It is cleared when
the host initiates the next transmission. All bits remain low unless the event that corresponds to a
particular bit occurs during transmission. Each transmission should be followed by a read of this register.
The contents of this register are not specified until after the first transmission.
7
6
5
4
OWC
CDH
FU
CRS
Bit
Symbol
D0
PTX
Packet Transmitted: Indicates transmission without error (No excessive
collisions or FIFO underrun) (ABT=
”
0
”
,FU=
”
0
”
).
D1
-
Reserved
D2
COL
Transmit Collided: Indicates that the transmission collided at least once
with another station on the network. The number of collisions is recorded
in the Number of Collisions Registers. (NCR).
D3
ABT
Transmit Aborted: Indicates the EPCC aborted transmission because of
excessive collisions. (Total number of transmissions including original
transmission attempt equals 16).
D4
CRS
Carrier Sense Lost: This bit is set when carrier is lost during transmission
of the packet. Carrier Sense is monitored from the end of Preamble/ Synch
until TXE is dropped. Transmission is not aborted on loss of carrier.
D5
FU
FIFO Underrun: If the EPCC cannot gain access of the bus before the
FIFO empties, this bit is set. Transmission of the packet will be aborted.
3
2
1
-
0
ABT
COL
PTX
Description
Confidential.
Copyright
2003, IC Plus Corp.
17/26
August 27, 20003
TC3299A-DS-R30
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