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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： | 20/50页 |
| 文件大小： | 530K |
| 代理商： | DS2490 |
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DS2490
20 of 50
033199
monitored via the State Registers. See the section “DEVICE FEEDBACK” for details on command
monitoring.
Communication Command Set Summary
Table 12
Command
ERROR ESCAPE
SET DURATION
PULSE
1-WIRE RESET
BIT I/O
BYTE I/O
BLOCK I/O
MATCH ACCESS
READ STRAIGHT
DO & RELEASE
SET PATH
Function
Escape from macro on error.
Change duration of strong pullup or programming pulse.
Perform strong pullup or generate programming pulse.
Generate 1-Wire reset pulse.
1-Wire single data bit I/O.
1-Wire data byte I/O.
1-Wire data block I/O.
Address a device on the 1-Wire bus.
Transmit a data preamble and read back data.
Control Crytpo iButton CPU activity.
Activate a series of couplers that provide access to a target 1-Wire
device.
Write data to the scratchpad of a 1-Wire SRAM device.
Write data directly to the data or status memory of a 1-Wire EPROM
device.
Read CRC protected pages of a 1-Wire EPROM device or tamper-
detect bytes and counter value of Monetary iButtons.
Read a single page of data and check the CRC. Follow page
redirections if set.
Access a device using the Search ROM command or identifying
devices on the active segments of a MicroLAN.
WRITE SRAM PAGE
WRITE EPROM
READ CRC PROT PAGE
READ REDIRECT PAGE
W/CRC
SEARCH ACCESS
Communication Command Set Descriptions:
ERROR ESCAPE -
This command can be placed between commands in a macro. If an error condition
occurred when executing the Communication command prior to the ERROR ESCAPE command, further
Communication command processing will be stopped and a Result Register processing error indication
byte will be loaded in the feedback data buffer to be sent to the host. (See the section “DEVICE
FEEDBACK” and Table 17 for a Result Register description.) If an error condition was detected, host
intervention is required to recover from the ERROR ESCAPE state. If no error occurred, the command is
processed as a NO OPERATION. Embedded command bit RST enables a 1-Wire reset before the
command executes.
Note
: The ERROR ESACAPE command
should not
be used as the last command of a macro. Nor
should the ERROR ESCAPE command be used between individual communication commands; it should
only be used within a macro command set. If this requirement is violated and the ERROR ESCAPE
command is used as the last macro command or between individual instructions, the potential exists for
the maco or individual instruction following the ERROR ESCAPE to be skipped and purged from
command FIFOs. Additionally, it is not necessary since, by requirement, the last macro command must
have it’s embedded ICP bit set to (ICP=1, see APPENDIX 2 for command coding); this will force error
reporting.
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PDF描述 |
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| DS2490S | USB to 1-Wire Bridge Chip |
| DS2502-E64 | IEEE EUI-64 Node Address Chip |
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| DS26334G | 3.3V, 16-Channel, E1/T1/J1 Short and Long-Haul Line Interface Unit |
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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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