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参数资料
| 型号： | DS2490 |
| 英文描述： | USB to 1-Wire Bridge Chip |
| 中文描述： | USB与1-Wire桥接芯片 |
| 文件页数： | 10/50页 |
| 文件大小： | 530K |
| 代理商： | DS2490 |
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DS2490
10 of 50
033199
USB CONFIGURATION
Figure 10
1-WIRE
CLIENT
USB HOST
SYSTEM
SW
DS2490 USB 1-WIRE DEVICE
1-WIRE INTERFACE
TOUCH DETECTION
DEVICE STATE
1-WIRE
DATA I/O
EP2
EP3
EP1
USB ENUMERATION
USB CONTROL
1-WIRE CONTROL
EP0
default pipe
interrupt pipe
bulk pipe
bulk pipe
USB PHYSICAL I/F
1-WIRE COMMUNICATION
1-WIRE MODE
Endpoint (EP) Summary Description
EP0 is the endpoint for the bi-directional default control pipe. It is used for the USB enumeration
process, USB core request communication, and all DS2490 specific command communication.
EP1 is the endpoint for an interrupt pipe (Device to Host) and is used to relay DS2490 status register data
and specific command execution completion and/or error information to the host. It is also used to
inform the host of 1-Wire device-attach detection. The polling period requested for EP1 is either 10 mS
or 1 mS, depending on the alternate interface setting of the 1-Wire interface. The default polling period
for EP1 is 10 mS.
EP2 is an endpoint for a bulk data out pipe (Data from Host) and is used to transmit 1-Wire device data
from the host to the DS2490. The information received at this endpoint will be transmitted as data on the
1-Wire bus.
EP3 is an endpoint for a bulk data in pipe (Data to Host) and is used to send data received by the DS2490
from the 1-Wire bus back to the host for processing.
1-Wire Interface Summary Description
The interface is the USB collection point for the four endpoints. Four alternate settings exist for the 1-
Wire interface which correspond to different operational modes for the pipes to EP1, EP2, and EP3. As
shown in Table 2, the alternate settings specify different polling periods for the interrupt pipe and
different maximum packet sizes for the two bulk pipes.
相关PDF资料 |
PDF描述 |
|---|---|
| DS2490S | USB to 1-Wire Bridge Chip |
| DS2502-E64 | IEEE EUI-64 Node Address Chip |
| DS26334 | 3.3V, 16-Channel, E1/T1/J1 Short and Long-Haul Line Interface Unit |
| DS26334G | 3.3V, 16-Channel, E1/T1/J1 Short and Long-Haul Line Interface Unit |
| DS26334GN | 3.3V, 16-Channel, E1/T1/J1 Short and Long-Haul Line Interface Unit |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2490S | 功能描述:接口 - 专用 RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| DS2490S+ | 制造商:Maxim Integrated Products 功能描述:USB TO 1-WIRE BRIDGE 24SOIC W - Rail/Tube 制造商:Maxim Integrated Products 功能描述:USB 1-W BRIDGE CHIP 24-SO LF 制造商:Maxim Integrated Products 功能描述:Bulk |
| DS2490S+T&R | 制造商:Maxim Integrated Products 功能描述:USB TO 1-WIRE BRIDGE 24SOIC W - Tape and Reel |
| DS2490S+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:USB to 1-Wire Bridge Chip |
| DS2490X | 制造商:未知厂家 制造商全称:未知厂家 功能描述:USB to 1-Wire Bridge Chip(468.41 k) |
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