- 您現在的位置：買賣IC網 > PDF目錄378205 > RTL8139 (Electronic Theatre Controls, Inc.) REALTEK 3.3V SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT PDF資料下載
參數資料
| 型號： | RTL8139 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | REALTEK 3.3V SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT |
| 中文描述： | 瑞昱3.3V的單芯片快速以太網控制器電源管理 |
| 文件頁數： | 47/62頁 |
| 文件大小： | 648K |
| 代理商： | RTL8139 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁當前第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁
RTL8139C(L)
2002/01/10
Rev.1.4
47
9.8 Rx Decapsulation
The RTL8139C(L) continuously monitors the network when reception is enabled. When activity is recognized it starts to process
the incoming data.
After detecting receive activity on the line, the RTL8139C(L) starts to process the preamble bytes based on the mode of
operation.
While operating in 100Base-TX mode, the RTL8139C(L) expects the frame to start with the symbol pair JK in the first bye of the
8-byte preamble.
The RTL8139C(L) checks the CRC bytes and checks if the packet data ends with the TR symbol pair, if not, the RTL8139C(L)
reports a CRC error RSR.
The RTL8139C(L) reports a RSR<CRC> error in the following case:
In 100Base-TX mode, one of the following occur.
a. An invalid symbol (4B/5B Table) is received in the middle of the frame.
The RSR<ISE> bit also sets.
b. The frame does not end with the TR symbol pair.
9.9 Flow Control
The RTL8139C(L) supports IEEE802.3X flow control to improve performance in full-duplex mode. It detects PAUSE packets
to achieve flow control tasks.
9.9.1. Control Frame Transmission
When the RTL8139C(L) detects that its free receive buffer is less than 3K bytes, it sends a
PAUSE packet with
pause_time(=FFFFh)
to inform the source station to stop transmission for the specified period of time. After the driver has
processed the packets in the receive buffer and updated the boundary pointer, the RTL8139C(L) sends the other
PAUSE packet
with pause_time(=0000h)
to wake up the source station to restart transmission.
9.9.2. Control Frame Reception
The RTL8139C(L) enters a back off state for a specified period of time when it receives a valid
PAUSE packet with
pause_time(=n)
. If the PAUSE packet is received while the RTL8139C(L) is transmitting, the RTL8139C(L) starts to back off
after current transmission completes. The RTL8139C(L) is free to transmit the next packets when it receives a valid
PAUSE
packet with pause_time(=0000h)
or the
backoff timer(=n*512 bit time)
elapses.
Note: The PAUSE operation cannot be used to inhibit transmission of MAC Control frames (e.g. a PAUSE packet). The N-way
flow control capability can be disabled. Please refer to Section 7, “EEPROM (93C46 or 93C56) Contents” for a detailed
description.
9.10 LED Functions
9.10.1 10/100 Mbps Link Monitor
The Link Monitor senses the link integrity or if a station is down.
相關PDF資料 |
PDF描述 |
|---|---|
| RTL8139A | REALTEK SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT |
| RTL8139B | REALTEK SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT |
| RTL8139D | REALTEK SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT |
| RTL8201 | REALTEK SINGLE CHIP SINGLE PORT 10/100M FAST ETHERNET PHYCEIVER RTL8201BL |
| RTL8201BL | REALTEK SINGLE CHIP SINGLE PORT 10/100M FAST ETHERNET PHYCEIVER RTL8201BL |
相關代理商/技術參數 |
參數描述 |
|---|---|
| RTL8139A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:REALTEK SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT |
| RTL8139B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:REALTEK SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT |
| RTL8139C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:REALTEK SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT |
| RTL8139C_PLUS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RTL8139C_Plus Specification |
| RTL8139CL | 制造商:Realtek Semiconductor 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。