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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： | 21/50页 |
| 文件大小： | 530K |
| 代理商： | DS2490S |
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DS2490
21 of 50
033199
Command parameters:
EP2 data:
EP3 data:
Result Register:
None.
None.
None.
Code
EOS, RDP,
CRC, CMP,
VPP, APP, SH,
NRS
None.
Condition
Error during execution of the previous command.
No error occurred during execution of the previous
command.
SET DURATION -
This command changes the State Register pulse duration value for either the +12V
programming pulse or strong pullup. The new duration value is loaded into the duration register specified
by the TYPE embedded command parameter as detailed in Appendix 2. See section “MODE
COMMANDS” for duration parameter value setting. The duration values can alternatively be changed
using a Mode command.
Note
: An infinite duration pulse is terminated by using either of the HALT EXECUTION Control
commands. To resume 1-Wire activity after the termination, use the RESUME EXECUTION Control
command.
Command parameters:
1 byte specifying the new duration.
EP2 data:
None, this command gets its input data as a command parameter.
EP3 data:
None.
Result Register:
None, this command returns no error code.
PULSE -
This command is used to temporarily pull the 1-Wire bus to +12V in order to program an
EPROM device or to generate a strong pullup to 5V in order to provide extra power for an attached
iButton device, e.g., temperature sensor or crypto iButton. The embedded TYPE parameter bit specifies
the pulse type. The pulse duration is determined by the value in the respective mode register,
programming pulse or strong pullup. The 12VP bit in the Device Status Flags (bit2) is used to determine
whether +12V VPP programming voltage is present, see Table 15.
Command parameters:
None.
EP2 data:
None.
EP3 data:
None.
Result Register:
Code
VPP.
Non.
Condition
ICP=0 and no +12V was sensed.
Otherwise.
1-WIRE RESET -
This command is used to generate a reset pulse on the 1-Wire bus and to optionally
change the 1-Wire speed. The new speed will take effect only if the embedded command bit SE is set to
1. When the 1-WIRE RESET is sent after an Overdrive Skip ROM command, SE must be 1 and the new
speed must be 0x02. See MODE CONTROL section for additional communication speed information.
To switch back to regular speed, set SE=1 and the new speed parameter to 0x00 (regular) or 0x01
(flexible).
Command parameters:
1 byte specifying new speed after the reset.
EP2 data:
None.
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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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