COM20019I 参数 Datasheet PDF下载

低成本ARCNET （ ANSI 878.1 ）控制器2K ×8板载RAM

目录

第1章

第2章

第3章

第4章

一般DESCRIPTION.....................................................................................................五

PIN CONFIGURATIONS........................................................................................................ 6

引脚功能说明.............................................. ...................................... 8

协议说明................................................ ............................................... 11

4.1

网PROTOCOL............................................................................................................................11

4.2

数据RATES.............................................................................................................................................11

4.3

网络重构.............................................................................................................11

4.4

广播MESSAGES........................................................................................................................12

4.5

扩展超时功能...........................................................................................................12

4.5.1

响应时间...................................................................................................................................12

4.5.2

空闲时间.............................................................................................................................................12

4.5.3

重新配置时间..........................................................................................................................13

4.6

线路协议......................................................................................................................................13

4.6.1

邀请函Transmit........................................................................................................................13

4.6.2

免费缓冲区查询..........................................................................................................................13

4.6.3

数据Packets.......................................................................................................................................13

4.6.4

致谢.............................................................................................................................14

4.6.5

负致谢..............................................................................................................14

第5章

系统说明..................................................................................................... 15

5.1

微控制器INTERFACE..........................................................................................................15

5.1.1

高速CPU总线时序支持............................................ .................................................. ..18

5.2

传输媒体接口......................................................................................................19

5.2.1

背板配置.....................................................................................................................19

5.2.2

差分驱动器配置..........................................................................................................20

5.2.3

可编程极性TXEN .............................................................................................................20

第6章

功能DESCRIPTION............................................................................................. 23

6.1

MICROSEQUENCER.................................................................................................................................23

6.2

内部REGISTERS............................................................................................................................24

6.2.1

中断屏蔽寄存器（ IMR ） .............................................................................................................24

6.2.2

数据寄存器......................................................................................................................................24

6.2.3

暂定ID注册..........................................................................................................................25

6.2.4

节点ID Register.................................................................................................................................25

6.2.5

下一个ID Register..................................................................................................................................25

6.2.6

状态Register....................................................................................................................................25

6.2.7

诊断状态寄存器..................................................................................................................26

6.2.8

命令寄存器.............................................................................................................................26

6.2.9

地址指针寄存器..................................................................................................................26

6.2.10

组态Register.....................................................................................................................26

6.2.11

子地址寄存器.....................................................................................................................26

6.2.12

设置1 Register..............................................................................................................................26

6.2.13

设置2 Register..............................................................................................................................27

6.3

内部RAM ........................................................................................................................................34

6.3.1

顺序访问Memory.................................................................................................................34

6.3.2

访问速度.....................................................................................................................................35

6.4

软件INTERFACE..........................................................................................................................35

6.4.1

选择内存页面大小...................................................................................................................35

6.4.2

发送序列.............................................................................................................................37

6.4.3

接收序列..............................................................................................................................38

6.5

COMMAND CHAINING..............................................................................................................................39

6.5.1

发送命令链.............................................................................................................40

6.5.2

收到命令链..............................................................................................................40

6.6

RESET详情.......................................................................................................................................41

6.6.1

内部复位逻辑............................................................................................................................41

6.7

初始化顺序....................................................................................................................41

6.7.1

公共汽车Determination...............................................................................................................................41

6.8

改进的诊断......................................................................................................................42

6.8.1

正常Results:...................................................................................................................................43

SMSC COM20019I

第3页

牧师06年3月7日

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