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參數(shù)資料
| 型號： | DS2490S |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Bus Controller |
| 英文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PDSO24 |
| 封裝： | 0.300 INCH, SO-24 |
| 文件頁數(shù)： | 9/51頁 |
| 文件大?。?/td> | 444K |
| 代理商： | DS2490S |
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DS2490
17 of 50
Table 11 will result in undefined behavior. The DS2490 DSO/W0R power-up default value for Flexible
speed is 7
μs.
Flexible Speed DSO/ W0R Time Codes Table 11
Code
Nominal DSO/W0R Time
0x0
3
μs
0x1
4
μs
0x2
5
μs
0x3
6
μs
0x4
7
μs
0x5
8
μs
0x6
9
μs
0x7
10
μs
0x8..0xF
reserved
Power-on Default Mode Values
Table 12 summarizes the power-up default values for the various DS2490 mode registers. Note that the
power-up default communication speed is regular and several of the values listed in Table 12 are specific
to Flexible speed operation. To change a value the appropriate Mode or Communication command must
be sent to the device.
1-Wire Power-On Default Modes Table 12
Setting/Parameter
Power-On Default Value
Strong pullup to 5V
FALSE
12V Programming Pulse
FALSE
Dynamic Speed Change
FALSE
1-Wire Bus Communication Speed
0x0 (Regular Speed, ~16kbps)
+5V Strong Pullup Duration
0x20 (512ms)
+12V Programming Pulse Duration
0x40 (51
μs)
Pulldown Slew Rate Control
0x5 (0.83V/
μs)
Write-1 Low Time
0x4 (12
μs)
Data Sample Offset / Write-0 Recovery Time
0x4 (7
μs)
CONTROL COMMANDS
DS2490 Control commands are used to control the processing of Communication commands/data and can
also be used to issue a device Reset. As listed in Table 13 there are 9 Control commands. The USB
control transfer setup packet coding to transmit these commands is detailed in Appendix 1. Like Mode
commands, Control commands are immediately processed by the DS2490 when they are received.
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PDF描述 |
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| DS2502P | 128 X 8 OTPROM, PDSO6 |
| DS2502S | 128 X 8 OTPROM, PDSO8 |
| DS2502 | 128 X 8 OTPROM, PBCY3 |
| DS2505/T&R | 16K X 1 OTPROM, PBCY3 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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 制造商全稱:Maxim Integrated Products 功能描述:USB to 1-Wire Bridge Chip |
| DS2490X | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:USB to 1-Wire Bridge Chip(468.41 k) |
| DS2490X/T&R | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59 |
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