DM9621
USB2.0快速以太网控制器
7.2.24自动协商（续） ......................................... ............................... 53
8.直流和交流电气特性........................................... ..................................... 54
8.1绝对最大额定值（ 25 ° C） ......................................... ................................ 54
8.1.1工作条件............................................. ......................................... 54
8.2直流电气特性（ VDD = 3.3V ） ........................................ ...................... 55
8.3交流电气特性&时序波形........................................... ....... 55
8.3.1 TP接口............................................. .................................................. ..... 55
8.3.2振荡器/晶体定时........................................... ...................................... 56
9. AC时序波形： ........................................................................................................ 57
9.1上电复位时序............................................. ............................................... 57
9.2 EEPROM时机....................................................................................................... 58
9.3 RMII TX timing.......................................................................................................... 59
9.4 RMII接收时序......................................................................................................... 59
10.磁和水晶选择指南........................................... .................................. 60
10.1磁选型指南.............................................. ......................................... 60
10.2晶体选择指南.............................................. ............................................ 60
11.应用电路............................................................................................................ 62
12.包Information........................................................................................................ 65
13.订购Information........................................................................................................ 66
初步
版本： DM9621 -14 - DS- P02
2011年2月23日
5
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
