參數(shù)資料
型號： KSZ8721CL TR
廠商： Micrel Inc
文件頁數(shù)： 27/32頁
文件大小： 0K
描述： TXRX 10/100 3.3V 48-LQFP
標(biāo)準(zhǔn)包裝： 1,000
類型： 收發(fā)器
驅(qū)動器/接收器數(shù)： 1/1
規(guī)程： MII
電源電壓： 3 V ~ 3.6 V
安裝類型： 表面貼裝
封裝/外殼： 48-LQFP
供應(yīng)商設(shè)備封裝： 48-LQFP（7x7）
包裝： 帶卷 (TR)
其它名稱： KSZ8721CLTR
KSZ8721CLTR-ND
KS8721CL
Micrel
M9999-100804
4
October 2004
Table Of Contents
Pin Description ........................................................................................................................................................... 6
Strapping Option ........................................................................................................................................................ 9
Pin Configuration ..................................................................................................................................................... 10
Introduction
.......................................................................................................................................................... 11
100BASE-TX Transmit ........................................................................................................................................ 11
100BASE-TX Receive ......................................................................................................................................... 11
PLL Clock Synthesizer ........................................................................................................................................ 11
Scrambler/De-scrambler (100BASE-TX only) ..................................................................................................... 11
10BASE-T Transmit ............................................................................................................................................ 11
10BASE-T Receive ............................................................................................................................................. 11
SQE and Jabber Function (10BASE-T only) ....................................................................................................... 11
Auto-Negotiation ................................................................................................................................................. 11
MII Management Interface .................................................................................................................................. 12
MII Data Interface ............................................................................................................................................... 12
Transmit Clock ............................................................................................................................................ 12
Receive Clock ............................................................................................................................................. 12
Transmit Enable .......................................................................................................................................... 12
Receive Data Valid ...................................................................................................................................... 12
Error Signals ................................................................................................................................................ 12
Carrier Sense .............................................................................................................................................. 12
Collision ....................................................................................................................................................... 13
RMII (Reduced MII) Data Interface ..................................................................................................................... 13
RMII Signal Definition .......................................................................................................................................... 13
Reference Clock ................................................................................................................................................. 13
Carrier Sense/Receive Data Valid ....................................................................................................................... 13
Receive Data ...................................................................................................................................................... 13
Transmit Enable .................................................................................................................................................. 13
Transmit Data ..................................................................................................................................................... 14
Collision Detection .............................................................................................................................................. 14
RX_ER
.......................................................................................................................................................... 14
RMII AC Characteristics ...................................................................................................................................... 14
Unused RMII Pins ............................................................................................................................................... 14
Auto-Crossover (Auto-MDI/MDI-X) ..................................................................................................................... 15
Power Management ............................................................................................................................................ 16
100BT FX Mode .................................................................................................................................................. 16
Media Converter Operation ................................................................................................................................. 16
Circuit Design Reference for Power Supply ........................................................................................................ 17
Register Map
.......................................................................................................................................................... 18
Register 0h: Basic Control .................................................................................................................................. 18
Register 1h: Basic Status ................................................................................................................................... 18
Register 2h: PHY Identifier 1 .............................................................................................................................. 19
Register 3h: PHY Identifier 2 .............................................................................................................................. 19
Register 4h: Auto-Negotiation Advertisement .................................................................................................... 19
Register 5h: Auto-Negotiation Link Partner Ability ............................................................................................. 19
Register 6h: Auto-Negotiation Expansion ........................................................................................................... 20
Register 7h: Auto-Negotiation Next Page ........................................................................................................... 20
Register 8h: Link Partner Next Page Ability ....................................................................................................... 20
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