COM20022I-3.3V 参数 Datasheet PDF下载

10 Mbps的ARCNET （ ANSI 878.1 ）控制器2Kx8片上RAM

数据表

图列表

图3.1 - COM20022I 3V操作........................................................................................................................10

图5.1 - 复用， 8051 - 就像总线接口与RS - 485接口................................... .................................. 17

图5.2 - 非复用， 6801样总线接口与RS - 485接口................................. .............................. 18

图5.3 - 高速CPU总线时序 - 英特尔CPU模式...................................... ................................................ 20

图5.4 - COM20022I 3V网络采用RS - 485差分收发器...................................... ......................... 22

图5.5 - Dipluse波形为1-1-0的数据...........................................................................................................22

图5.6 - 内部模块Diagram...............................................................................................................................24

图6.1 - 顺序访问Operation.....................................................................................................................39

图6.2 - 内存缓冲数据包配置..............................................................................................................42

图6.3 - 命令链接状态寄存器Queue...............................................................................................44

图7.1 - AC测量....................................................................................................................................52

图8.1 - 复用总线， 68XX样控制信号;读周期................................................ ........................ 53

图8.2 - 复用总线， 80XX样控制信号;读周期................................................ ........................ 54

图8.3 - 复用总线， 68XX样控制信号;写周期................................................ ......................... 55

图8.4 - 复用总线， 80XX样控制信号;写周期................................................ ......................... 56

图8.5 - 非复用总线， 80XX样控制信号;读周期................................................ ................. 57

图8.6 - 非复用总线， 80XX样控制信号;读周期................................................ ................. 58

图8.7 - 非复用总线， 68XX样控制信号;读周期................................................ ................. 59

图8.8 - 非复用总线， 68XX样控制信号;读周期................................................ ................. 60

图8.9 - 非复用总线， 80XX样控制信号;写周期................................................ ................. 61

图8.10 - 非复用总线， 80XX样控制信号;写周期................................................ ............... 62

图8.11 - 非复用总线， 68XX样控制信号;写周期................................................ ............... 63

图8.12 - 非复用总线， 68XX样控制信号;写周期................................................ ............... 64

图8.13 - 正常模式发送或接收Timing..............................................................................................65

图8.14 - 背板模式发送或接收时序......................................... ............................................... 66

图8.15 - TTL输入时序上XTAL1 Pin..............................................................................................................67

图8.16 - 复位和中断时序.....................................................................................................................67

图8.17 - 48引脚TQFP封装外形................................................................................................................68

图9.1 - 在TA / RI的EF位的影响。 Bit..........................................................................................................71

图10.1 - 电路图接口的实例，以ISA总线...................................... .......................................... 72

表格清单

表5.1 - 典型媒体.............................................................................................................................................24

表6.1 - 已读Summary............................................................................................................................25

表6.2 - 数据寄存器的16位访问..................................................................................................................26

表6.3 - 写寄存器汇总............................................................................................................................26

表6.4 - 数据寄存器的16位地址.................................................................................................................26

表6.5 - 状态寄存器...........................................................................................................................................30

表6.6 - 诊断状态Register..........................................................................................................................31

表6.7 - 命令Register.....................................................................................................................................32

表6.8 - 地址指针寄存器高....................................................................................................................33

表6.9 - 地址指针低Register.....................................................................................................................33

表6.10 - 子地址寄存器...............................................................................................................................34

表6.11 - 配置寄存器..............................................................................................................................34

表6.12 - 设置寄存器1 .......................................................................................................................................36

表6.13 - 设置2注册.......................................................................................................................................37

表6.14 - 总线控制Register.................................................................................................................................38

表8.1 - 48引脚TQFP封装参数............................................................................................................68

SMSC COM20022I 3.3V Rev.C

第5页

修订07年3月8日

数据表