KS8721SL A4 Micrel Inc, KS8721SL A4 Datasheet - Page 4

• Manufacturer Part Number: KS8721SL A4
• Manufacturer: Micrel Inc

Specifications of KS8721SL A4

• Lead Free Status / RoHS Status: Not Compliant

KS8721BL/SL
Table Of Contents
M9999-022105
Pin Description .............................................................................................................................................................6
Strapping Option ...........................................................................................................................................................9
Pin Configuration ........................................................................................................................................................10
Introduction
Register Map
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
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
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 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
Transmit Clock ..............................................................................................................................................12
Receive Clock ...............................................................................................................................................12
Transmit Enable ............................................................................................................................................12
Receive Data Valid ........................................................................................................................................12
Error Signals ..................................................................................................................................................12
Carrier Sense ................................................................................................................................................12
Collision .........................................................................................................................................................13
............................................................................................................................................................11
............................................................................................................................................................14
............................................................................................................................................................18
4
February 2005
Micrel