VSC8244
Data Sheet
12 Twisted Pair Interface..................................................................................................................................... 33
12.1 Twisted Pair Autonegotiation (IEEE802.3 Clause 28) ...............................................................................................33
12.2 Twisted Pair Auto MDI/MDI-X Function .....................................................................................................................34
12.3 Auto MDI/MDI-X in Forced 10/100 Link Speeds .......................................................................................................34
12.4 Twisted Pair Link Speed Downshift ..........................................................................................................................34
13 Transformerless Ethernet Operation for PICMG 2.16 and 3.0 IP-based Backplanes............................... 35
14 Serial Management Interface (SMI)............................................................................................................... 35
14.1 SMI Interrupt .............................................................................................................................................................36
15 Parallel LED Interface..................................................................................................................................... 38
16 Serial LED Output........................................................................................................................................... 41
17 Test Mode Interface (JTAG) ........................................................................................................................... 42
17.1 Supported Instructions and Instruction Codes ..........................................................................................................43
17.2 Boundary-Scan Register Cell Order .........................................................................................................................44
18 VeriPHY Cable Diagnostics ........................................................................................................................... 45
18.1 Coupling Between Cable Pairs .................................................................................................................................45
18.2 Cable Pair Termination ..............................................................................................................................................45
18.3 Cable Length ............................................................................................................................................................45
18.4 Using VeriPHY in normal operating mode ................................................................................................................45
19 ActiPHY Power Management......................................................................................................................... 46
19.1 Operation in ActiPHY Mode ......................................................................................................................................46
19.2 Low power state ........................................................................................................................................................47
19.3 LP Wake up state ......................................................................................................................................................47
19.4 Normal operating state .............................................................................................................................................47
20 Ethernet In-line Powered Device Support.................................................................................................... 48
20.1 Cisco In-Line Powered Device Detection ..................................................................................................................48
20.2 In-Line Power Ethernet Switch Diagram ...................................................................................................................48
20.3 In-Line Powered Device Detection (Cisco Method) ..................................................................................................49
20.4 IEEE 802.3af (DTE Power via MDI) ..........................................................................................................................49
21 Advanced Test Modes.................................................................................................................................... 49
21.1 Ethernet Packet Generator (EPG) ............................................................................................................................49
21.2 CRC Counter ............................................................................................................................................................49
21.3 Far-end Loopback .....................................................................................................................................................50
21.4 Near-end Loopback ..................................................................................................................................................50
21.5 Connector Loopback .................................................................................................................................................51
22 Initialization & Configuration......................................................................................................................... 52
22.1 Resets .......................................................................................................................................................................52
22.2 Power-Up Sequence .................................................................................................................................................52
22.3 CMODE Pin Configuration ........................................................................................................................................52
22.4 EEPROM Interface ...................................................................................................................................................55
5 of 7
VMDS-10108 Revision 4.1
7
June 2006
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