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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： | 30/50页 |
| 文件大小： | 530K |
| 代理商： | DS2490 |
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DS2490
30 of 50
033199
DS2490 STATE REGISTERS
Table 15
Description
Enable Flags
Offset
0x00
Data
bit7
--
SPUE If set to 1 the strong pullup to 5V is enabled, if set to 0 it
is disabled.
PRGE If set to 1 a 12V programming pulse is enabled, if set to 0
it is disabled.
SPCE If set to 1 a dynamic 1-Wire bus speed change through a
Communication command is enabled, if set to 0 it is
disabled.
bit 3..7 These bits are reserved.
current 1-Wire bus speed code
current pullup duration
current programming pulse duration
bit6
--
bit5
--
bit4
--
bit3
--
bit2
SPCE
bit1
PRGE
bit0
SPUE
1-Wire Speed
Strong Pullup Duration
Programming Pulse
Duration
Pulldown Slew Rate
Control
Write-1 Low Time
Data Sample Offset /
Write-0 Recovery Time
Reserved (Test Register)
Device Status Flags
0x01
0x02
0x03
0x04
current pulldown slew rate code
0x05
0x06
current Write-1 low time code
current data sample offset/ Write-0 recovery time code
0x07
0x08
bit7
--
Bit Definitions:
SPUA
bit6
--
bit5
IDLE
bit4
HALT
bit3
PMOD
bit2
12VP
bit1
PRGA
bit0
SPUA
if set to 1 the strong pullup to 5V is currently active, if
set to 0 it is inactive.
if set to 1 a 12V programming pulse is currently being
generated, if set to 0 it is not.
if set to 1 the external 12V programming voltage is
present, if set to 0 it is not present.
if set to 1 the DS2490 is powered from USB and external
sources, if set to 0 all DS2490 power is provided from
USB.
HALT if set to 1 the DS2490 is currently halted, if set to 0 the
device is not halted.
IDLE if set to 1 the DS2490 is currently idle, if set to 0 the
device is not idle.
bit 6..7:
reserved
Communication command currently being processed. If the device
is idle a register value of 0x00 is sent.
Communication command currently being processed. If the device
is idle a register value of 0x00 is sent.
PRGA
12VP
PMOD
Communication
Command, Byte 1
Communication
Command, Byte 2
0x09
0x0A
相关PDF资料 |
PDF描述 |
|---|---|
| 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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