參數(shù)資料
型號(hào)： RTL8208
廠商： Electronic Theatre Controls, Inc.
英文描述： REALTEK SINGLE CHIP OCTAL 10/100 MBPS FAST ETHERNET TRANSCEIVER
中文描述： 瑞昱單芯片八路10/100 Mbps快速以太網(wǎng)收發(fā)器
文件頁(yè)數(shù)： 28/40頁(yè)
文件大?。?/td> 546K
代理商： RTL8208
RTL8208
2001/01/07
28
Rev.1.923
7.7 Power Saving and Power Down Mode
7.7.1 Power Saving Mode
The RTL8208 implements a power saving mode on a per port basis. One port automatically enters power saving mode 10
seconds after the cable is disconnected from it, regardless of whether the RTL8208’s operation mode is Nway or Force mode.
Once one port enters power saving mode, it transmits normal link pulses only on its TXOP/TXON pins and keeps monitoring
RXIP/RXIN to try to detect any incoming signals , which might be 100Base-TX MLT-3 idle pattern, 10Base-T link pulses or
Nway’s FLP (fast link pulses). After it detects any incoming signals, it wakes up from the power saving mode and operates in the
normal mode according to the result of the connection.
Power saving mode is not supported when in 100FX operation.
7.7.2 Power Down Mode
Setting Register 0.11through the SMI interface forces the corresponding port of the RTL8208 to enter power down mode, which
disables all transmit/receive functions and RMII functions on that port, except SMI (MDC/MDIO management interface).
7.8 LED Configuration
The RTL8208 supports serial LED status streams for LED display. The forms of LED status streams, as shown below, are
controlled by LEDMODE[1:0] pins, which are latched upon reset. All LED statuses are represented as active-low, except
Link/Act in Bi-color LED mode, whose polarity depends on Spd status.
LEDMODE[1:0]
Mode
00
3-bit serial stream
Col/Fulldup, Link/Act, Spd
01
2-bit serial stream
Spd, Link/Act
10
3-bit for Bi-color LED Col/Fulldup, Link/Act, Spd
Output sequences
LED Statuses
Col/Fulldup
Description
Col, Full duplex Indicator. Blinking every 43ms when collision
happens. Low for full duplex, and high for half duplex mode.
Link, Activity Indicator. For 3-bit serial stream mode, low for link
established. For 3-bit Bi-color LED mode, Link/Act is high for link
established when speed is low (100Mb/s); Link/Act is low for link
established when speed is high (10Mb/s). Link/Act Blinks every
43ms when the corresponding port is transmitting or receiving.
Speed Indicator. Low for 100Mb/s, and high for 10Mb/s.
Link/Act
Spd
7.8.1 LED Blinking Time
LED blinking time can be set to 120ms by setting LED_BLNK_TIME=0. The LED statuses supporting 43/120ms blinking time
are Col/Fulldup, Link/Act. For status Link/Act/Spd, the LED blinking time is not affected by LED_BLNK_TIME.
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