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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： | 29/50页 |
| 文件大小： | 530K |
| 代理商： | DS2490 |
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DS2490
29 of 50
033199
DEVICE FEEDBACK
DS2490 state and result feedback are provided to the host over the EP1 interrupt pipe. The host interrupt
polling period for EP1 transfers is controlled by the alternate setting of the 1-Wire USB Interface as
described in the section: 1-Wire Interface Summary Description. As shown in Table 14, up to 32 bytes of
feedback data are returned. As a minimum, 16 bytes of STATE REGISTER data will be delivered at each
polling interval (or USB IN transaction to EP1); the position and definition of these data values are listed
in Table 15. In addition, as shown in Table 16, between 0 and 16 extra bytes of RESULT REGISTER
data will be delivered which could contain communication command error data or a 1-Wire device detect
byte. If there are less than 32 bytes of result and state register data to return, the DS2490 will terminate
the IN transaction with a short or zero data packet.
Data is loaded into the RESULT REGISTER buffer if a communication command error occurs or upon
detection of a 1-Wire device attachment. There is no defined offset position for data values in this buffer.
Knowledge of communication command ordering sent to the DS2490 must be maintained on the host to
properly interpret the returned data values. In addition, a parse of the data is required to determine
whether or not a 1-Wire detect value is included; the value of the 1-Wire detect byte is unique. Table 17
defines the 1-Wire detect byte and data values that result from Communication command processing.
Interrupt Transfer Data Summary
Table 14
OFFSET
0x00 - 0x0F
0x10 – 0x1F*
DATA
STATE REGISTERS
RESULT REGISTERS
*
The number of RESULT RESIGTER values will vary depending on error conditions encountered while
processing Communication commands or whether a 1-Wire device was detected.
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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