DM8203
2-port switch with MII / RMII Interface
9.3.3 Serial Management Interface .............................................................................................................................. 49
9.3.4 Management Interface - Read Frame Structure............................................................................................... 49
9.3.5 Management Interface - Write Frame Structure............................................................................................... 49
9.4 Internal PHY functions.................................................................................................................................................. 50
9.4.1 100Base-TX Operation......................................................................................................................................... 50
9.4.1.1 4B5B Encoder .................................................................................................................................................... 50
9.4.1.2 Scrambler............................................................................................................................................................ 50
9.4.1.3 Parallel to Serial Converter .............................................................................................................................. 50
9.4.1.4 NRZ to NRZI Encoder....................................................................................................................................... 50
9.4.1.5 MLT-3 Converter................................................................................................................................................ 50
9.4.1.6 MLT-3 Driver....................................................................................................................................................... 50
9.4.1.7 4B5B Code Group ............................................................................................................................................. 51
9.4.2 100Base-TX Receiver .......................................................................................................................................... 52
9.4.2.1 Signal Detect ...................................................................................................................................................... 52
9.4.2.2 Adaptive Equalization........................................................................................................................................ 52
9.4.2.3 MLT-3 to NRZI Decoder.................................................................................................................................... 52
9.4.2.4 Clock Recovery Module.................................................................................................................................... 52
9.4.2.5 NRZI to NRZ....................................................................................................................................................... 52
9.4.2.6 Serial to Parallel................................................................................................................................................. 52
9.4.2.7 Descrambler ....................................................................................................................................................... 52
9.4.2.8 Code Group Alignment...................................................................................................................................... 53
9.4.2.9 4B5B Decoder.................................................................................................................................................... 53
9.4.3 10Base-T Operation ............................................................................................................................................. 53
9.4.4 Collision Detection ................................................................................................................................................ 53
9.4.5 Carrier Sense......................................................................................................................................................... 53
9.4.6 Auto-Negotiation.................................................................................................................................................... 53
9.5 HP Auto-MDIX Functional Descriptions ..................................................................................................................... 53
10.
DC AND AC ELECTRICAL CHARACTERISTICS..................................................... 55
10.1 Absolute Maximum Ratings ........................................................................................................................................ 55
10.2 Operating Conditions................................................................................................................................................... 55
6
Preliminary datasheet
DM8203-15-DS-P05
October 23, 2008
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
