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参数资料
| 型号： | DS2490Y |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/50页 |
| 文件大小： | 0K |
| 描述： | IC BRIDGE CLIP USB TO 1-W 24SOIC |
| 标准包装： | 1,000 |
| 应用： | USB |
| 接口： | 1 线 |
| 电源电压： | 3 V ~ 5.5 V |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
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DS2490
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COMMUNICATION COMMANDS
Communication commands are used to communicate with and control an attached 1-Wire device(s).
There are 14 Communication commands as summarized in Table 13. Communication commands also
contain embedded command bits for conditional control or additional functionality. Appendix 2 details
the embedded command bit purpose/formatting as well as the control transfer setup packet coding to
transmit the command/parameter data to the DS2490.
Unlike Mode and Control commands, Communication command processing is controlled by host
software by setting embedded command bits within a Communication command. For example, a
command macro form is supported in which several Communication commands and parameter data are
sent/buffered in the DS2490 and then processed as a group. Embedded command bit ICP is used to create
macro command sets. Also, unlike Mode and Control commands, several forms of Communication
command monitoring exist for host software to track processing progress.
Depending on the settings of embedded communication command bits ICP and NTF, see APPENDIX 2,
a Result Register value may be generated to provide command processing feedback. Communication
command buffer (FIFO) status and 1-Wire data transmit/received buffers (EP2/3 FIFOs) status can also
be monitored via the State Registers. See the section “DEVICE FEEDBACK” for details on command
monitoring.
Communication Command Set Summary Table 13
COMMAND
FUNCTION
SET DURATION
Change duration of strong pullup.
PULSE
Perform strong pullup.
1-WIRE RESET
Generate 1-Wire reset pulse.
BIT I/O
1-Wire single data bit I/O.
BYTE I/O
1-Wire data byte I/O.
BLOCK I/O
1-Wire data block I/O.
MATCH ACCESS
Address a device on the 1-Wire bus.
READ STRAIGHT
Transmit a data preamble and read back data.
DO & RELEASE
Control Crytpo iButton CPU activity.
SET PATH
Activate a series of couplers that provide access to a target 1-Wire
device.
WRITE SRAM PAGE
Write data to the scratchpad of a 1-Wire SRAM device.
READ CRC PROT PAGE
Read CRC protected pages of a 1-Wire EPROM device or tamper-
detect bytes and counter value of Monetary iButtons.
READ REDIRECT PAGE
W/CRC
Read a single page of data and check the CRC. Follow page
redirections if set.
SEARCH ACCESS
Access a device using the Search ROM command or identifying
devices on the active segments of a 1-Wire Network.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2490Y+ | 制造商:Maxim Integrated Products 功能描述:USB TO 1-WIRE BRIDGE 24SOIC W - Tape and Reel |
| DS24B33 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Wire 4Kb EEPROM |
| DS24B33 R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Wire 4Kb EEPROM |
| DS24B33 T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Wire 4Kb EEPROM |
| DS24B33 TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Wire 4Kb EEPROM |
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