- 您现在的位置：买卖IC网 > PDF目录26505 > COM20019ILJP (STANDARD MICROSYSTEMS CORP) PDF资料下载
参数资料
| 型号： | COM20019ILJP |
| 厂商： | STANDARD MICROSYSTEMS CORP |
| 元件分类： | 微控制器/微处理器 |
| 中文描述： | 1 CHANNEL(S), 312.5K bps, LOCAL AREA NETWORK CONTROLLER, PQCC28 |
| 封装： | PLASTIC, LCC-28 |
| 文件页数： | 26/65页 |
| 文件大小： | 386K |
| 代理商： | COM20019ILJP |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页当前第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页
Cost Competitive ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
Rev. 09-25-07
Page 32
SMSC COM20019I
DATASHEET
BIT
BIT NAME
SYMBOL
DESCRIPTION
4,3
Extended
Timeout 1,2
ET1, ET2
These bits allow the network to operate over longer
distances than the default maximum 32 miles by controlling
the Response, Idle, and Reconfiguration Times. All nodes
should be configured with the same timeout values for
proper network operation. For the COM20019I with a 20
MHz crystal oscillator, the bit combinations follow:
ET2
0
1
ET1
0
1
0
1
Response
Time (mS)
9.548
4.774
2.387
0.597
Idle Time
(mS)
10.496
5.248
2.624
0.656
Reconfig
Time (S)
13.44
6.72
Note: These values are for 312.5 Kbps and
RCNTMR[1,0]=00. Reconfiguration time is changed by the
RCNTMR1 and RCNTMR0 bits.
2
Backplane
BACK-
PLANE
A logic "1" on this bit puts the device into Backplane Mode
signaling which is used for Open Drain and Differential
Driver interfaces. This bit must be set to ‘1’ at the
COM20019I.
1,0
Sub Address 1,0
SUBAD
1,0
These bits determine which register at address 07 may be
accessed. The combinations are as follows:
SUBAD1
SUBAD0
Register
0
Tentative I
0
1
Node ID
1
0
Setup 1
1
Next ID
See also the Sub Address Register.
Table 6.10 - Setup 1 Register
BIT
BIT NAME
SYMBOL
DESCRIPTION
7
Pulse1 Mode
P1MODE
This bit determines the type of PULSE1 output driver used
in Backplane Mode. When high, a push/pull output is
used. When low, an open drain output is used. The
default is open drain.
6
Four NACKS
FOUR
NACKS
This bit, when set, will cause the EXNACK bit in the
Diagnostic Status Register to set after four NACKs to Free
Buffer Enquiry are detected by the COM20019I. This bit,
when reset, will set the EXNACK bit after 128 NACKs to
Free Buffer Enquiry. The default is 128.
5
Reserved
Do not set.
4
Receive All
RCVALL
This bit, when set, allows the COM20019I to receive all
valid data packets on the network, regardless of their
destination ID. This mode can be used to implement a
network monitor with the transmitter on- or off-line. Note
that ACKs are only sent for packets received with a
destination ID equal to the COM20019I's programmed
node ID. This feature can be used to put the COM20019I
in a 'listen-only' mode, where the transmitter is disabled
and the COM20019I is not passing tokens. Defaults low.
相关PDF资料 |
PDF描述 |
|---|---|
| CP0603A2442CSTR | |
| CP0805A0881ESTR | |
| CP0805A1441BSTR | |
| CP2101-GMR | |
| CP2101 | |
相关代理商/技术参数 |
参数描述 |
|---|---|
| COM20019I-LJP | 制造商:SMSC 制造商全称:SMSC 功能描述:Low Cost ARCNET(ANSI 878.1) Controller with 2k X 8 On-Board RAM |
| COM20019ILJP3V | 功能描述:网络控制器与处理器 IC ARCNET Contrllr RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| COM20019ILJPTR | 功能描述:网络控制器与处理器 IC Arcnet (ANSI 878.1) Controllr 2k x 8 Ram RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| COM20019IP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| COM20020 | 制造商:SMSC 制造商全称:SMSC 功能描述:COM20020 3.3V ULANC Universal Local Area Network Controller with 2K x 8 On-Board RAM |
发布紧急采购，3分钟左右您将得到回复。