參數(shù)資料
型號: GT-48001A
廠商: Galileo Technology Services, LLC
英文描述: Switched Ethernet Controller For 10BaseX(10BaseX交換式快速以太網(wǎng)控制器)
中文描述: 交換式以太網(wǎng)控制器10BaseX(10BaseX交換式快速以太網(wǎng)控制器)
文件頁數(shù): 46/101頁
文件大?。?/td> 1235K
代理商: GT-48001A
GT-48001A Switched Ethernet Controller
Revision 1.6
49
12.12.2.1 Generating the Required 10BaseT Signals
The GT-48001/1A drives TxD,TxDDel and TxEn outputs (TTL levels). These signals are used to generate the required
10BaseT pre-distrotion transmit signals.
TxDDel reflects the value of TxD, delayed by 50ns. There are two cases which differ according to the last transmitted
bit for the End of Packet Transmission as shown in Figure 7.
Figure 7: 10BaseT Signals
TxD
O
TxD
Transmit Data: Manchester encoded data. Whenever data is
not being transmitted, the idle signal, TP_IDL, is transmitted
via the TxD. The TP_IDL is a 100 ns wide positive pulse, once
every 13msec. Following a packet, the first TP_IDL pulse is
transmitted within 13msec to 26msec from the SOI of the
packet.
TxDDel
O
TxDDel
Transmit Data Delayed: TXD Delayed by 50ns.
TxEn
O
TxEn
Transmit Enable. Indicates that the data is present on TxD and
TxD_DL lines.
Table 26: 10BaseT Ethernet Interface Pin Descriptions
Pi n Na m e
I/ O
1 0 Ba seT
Mo de
Fu n c t i on a l it y
TxEn
TxD
50ns
100ns
TxDDel
10BaseT Link pulse Transmission
TxEn
TxD
TxDDel
10BaseT End of Packet Transmission, Last Data Bit is '0'
50ns
100 ns
50ns
250ns
TxEn
TxD
TxDDel
10BaseT End of Packet Transmission, Last Data Bit is '1'
50ns
100 ns
300ns
50ns
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