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参数资料
| 型号： | DS2490S |
| 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： | 25/50页 |
| 文件大小： | 530K |
| 代理商： | DS2490S |
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DS2490
25 of 50
033199
Command parameters:
1 byte specifying number of couplers that need to be activated to set-up
the path to the target device.
Length
Description
9 bytes per
level
followed by the Smart-On command code for either
the main or auxiliary 1-Wire coupler output.
Length
Description
1 byte
Number of couplers successfully activated; should be
the same as the number of levels.
Code
Condition
CMP, SH,
NRS
None
Otherwise.
EP2 data:
8 bytes ROM ID of the coupler to be activated
EP3 data:
Result Register:
ICP=0 and an error condition.
WRITE SRAM PAGE -
This command is used to write data to the scratchad of an SRAM device and
optionally check the CRC. To copy the data to its final memory location, it is required to send the READ
STRAIGHT command with a “copy scratchpad” preamble and a 0 block size. Embedded command bit
DT=1 activates the CRC16 generator. This command is also applicable to the Write IPR function of the
Crypto iButton if embedded command bit CIB=1. To write a partial page the page size parameter and the
target address need to be set accordingly. The EP2 FIFO must be pre-filled with preamble and SRAM
data before command execution. Additionally, for data page sizes greater then the EP2 FIFO size, the
FIFO content status must be monitored by host SW so that additional data can be sent to the FIFO when
necessary. See the HW/SW APPLICATION RECOMMENDATION section for additional details.
Command parameters:
1 byte specifying page size. This specifies the number of bytes to be
sent to the 1-Wire device following a 2- or 3-byte preamble. This
number is typically identical to the page size; a value of 0x00 indicates
a 256-byte page.
EP2 data:
Length
Description
If CIB=0: 3-bytes + page
size
SRAM device. 3-byte preamble: 1-Wire command
code, TA1, TA2 (typical).
If CIB=1: 2-bytes + page
size
SRAM device. 2-byte preamble: 1-Wire command
code, length information.
EP3 data:
None
Result Register:
Code
Condition
CRC
ICP=0 and an error condition (only if DT=1).
None
Otherwise.
Preamble and data bytes to be sent to the 1-Wire
Preamble and data bytes to be sent to the 1-Wire
WRITE EPROM -
This command is used to write data directly to the data or status memory of a 1-Wire
EPROM device. If embedded command bit DT=1, the CRC16 generator is selected; if DT=0, CRC8 is
used. Embedded command bit Z controls the method used for comparison of the data written to the 1-
Wire device. Additionally, embedded command bit F can be used to clear the Communication command
buffer and EP2, 3 FIFOs if an error occurs during execution of the command. The EP2 FIFO must be
pre-filled with preamble and EPROM data before command execution. Additionally, for data block sizes
greater then the EP2 FIFO size, the FIFO content status must be monitored by host SW so that additional
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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) |
| DS2490X/T&R | 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 |
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