參數(shù)資料
型號(hào): MX98905BFC
廠商: Electronic Theatre Controls, Inc.
英文描述: The MX98905 is designed for easy implementation of CSMA/CD local area networks,
中文描述: 該MX98905是專為易于實(shí)現(xiàn)的多址/光盤局域網(wǎng),
文件頁(yè)數(shù): 56/86頁(yè)
文件大?。?/td> 352K
代理商: MX98905BFC
56
P/N: PM0365
REV. 1.3, NOV 20 ,1995
MX98905B
10. TRANSMIT CONFIGURATION REGISTER (TCR)
0DH (WRITE)
Before transmission of a packet on the network, the
Transmit Configuration Register is configured to estab-
lish the actions of the transmitter section of the ENC
during transmission of a packet on the network. LB1
and LB0 select loopback mode power-up as 0.
CRC
LB0
LB1
ATD
OFST
0
1
2
3
4
5
x
6
x
7
x
Bits
SYMBOL
BIT
DESCRIPTION
CRC
D0
INHIBIT CRC
0: CRC appended by transmitter
1: CRC inhibited by transmitter
In loopback mode CRC can be enabled or disabled to test the CRC logic.
LB0, LB1
D1, D2
ENCODED LOOPBACK CONTROL
: The type of loopback to be performed is
determined by the following encoded bits.
LB1
0
0
1
1
LB2
0
1
0
1
Mode 0
Mode 1
Mode 2
Mode 3
Normal Operation
Internal Loopback
External Loopback to SNI
External Loopback to TP
ATD
D3
AUTO TRANSMIT DISABLE
: Setting this bit allows another station to disable the
ENC'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 bit 62 disables transmitter; reception of
multicast address hashing to bit 63 enables transmitter.
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