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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： | 14/50页 |
| 文件大小： | 530K |
| 代理商： | DS2490S |
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DS2490
14 of 50
033199
these parameters are as listed in Table 10. Each command and parameter control is detailed in the
following paragraphs.
Mode Command Set Summary
Table 5
Command
ENABLE PULSE
Function
Enable/disable 1-Wire strong pullup pulse to 5V and/or +12V programming
pulse.
Enable/disable dynamic change of the 1-Wire speed through a
communication command.
Communication speed of the 1-Wire bus.
Duration of 1-Wire strong pullup.
ENABLE SPEED
CHANGE
1-WIRE SPEED
STRONG PULLUP
DURATION
PULLDOWN SLEW
RATE
PROG PULSE
DURATION
WRITE-1 LOW TIME
DSOW0 RECOVERY
TIME
Slew rate of 1-Wire pulldown.
Duration of 1-Wire VPP EPROM programming pulse.
Duration of 1-Wire Write-1 low time.
Recovery time for the 1-Wire data sample offset / Write-0 transaction.
Mode Command Set Descriptions:
ENABLE PULSE –
This command is used to enable or disable a 1-Wire strong pullup pulse to 5V
and/or +12V EPROM programming pulse. Two bit positions in the parameter byte are used to control the
enabled/disabled state for each pulse type. The specific pulse is enabled when the respective bit is set to a
1 and disabled when set to a 0. The DS2490 power-up default state for both strong pullup and
programming pulse is disabled.
ENABLE SPEED CHANGE -
This command is used to enable or disable a 1-Wire communication
speed change. Enabled when a TRUE parameter value is passed with the command, disabled with a
FALSE. The DS2490 power-up default state for speed change is disabled.
1-WIRE SPEED -
This command is used to set the speed of 1-Wire communication; three settings are
possible. The parameter codes to select the desired or required speed are as listed in Table 6. As shown,
speed codes 0x3..0xF are undefined. The DS2490 decodes the 3 LSBs of the 1-Wire speed code. Sending
a code other than the defined values in Table 6 will result in undefined behavior. The DS2490 power-up
default communication speed is regular.
1-Wire Bus Speed Codes
Table 6
Code
Speed
0x0
Regular
0x1
Flexible
Data Rate
65
μ
s time slot (15.4 kbps)
65- 72
μ
s time slot (13.9 to
15.4 kbps)
10
μ
s time slot (100 kbps)
undefined
0x2
Overdrive
reserved
0x3..0xF
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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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