- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379183 > DS2409 MicroLAN Coupler PDF資料下載
參數(shù)資料
| 型號： | DS2409 |
| 英文描述： | MicroLAN Coupler |
| 中文描述： | MicroLAN耦合器 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大小： | 415K |
| 代理商： | DS2409 |
DS2409
102199
12 of 18
1-WIRE SIGNALING
The DS2409 requires strict protocols to ensure data integrity. The protocol consists of four types of
signaling on one line: Reset Sequence with Reset Pulse and Presence Pulse, Write 0, Write 1 and Read
Data. All these signals except presence pulse are initiated by the bus master. The initialization sequence
required to begin any communication with the DS2409 is shown in Figure 8. A reset pulse followed by a
presence pulse indicates the DS2409 is ready to send or receive data given the correct ROM command
and control function command. The bus master transmits (TX) a reset pulse (t
RSTL
, minimum 480 μs).
The bus master then releases the line and goes into receive mode (RX). The 1-Wire bus is pulled to a high
state via the pullup resistor. After detecting the rising edge on the data line, the DS2409 waits (t
PDH
, 15-60
μs) and then transmits the presence pulse (t
PDL
, 60-240 μs).
INITIALIZATION PROCEDURE “RESET AND PRESENCE PULSES”
Figure 8
*In order not to mask interrupt signaling by other devices on the 1-Wire bus, t
RSTL
+ t
R
should always be
less than 960 μs.
**The slew rate of the Presence Pulse is actively limited by the DS2409 to 1V/μs typically to minimize
ringing. The slope of all other edges is controlled by the 1-Wire bus driver at the host.
READ/WRITE TIME SLOTS
The definitions of write and read time slots are illustrated in Figure 9. All time slots are initiated by the
master driving the data line low. The falling edge of the data line synchronizes the DS2409 to the master
by triggering a delay circuit in the DS2409. During write time slots, the delay circuit determines when the
DS2409 will sample the data line. For a read data time slot, if a “0” is to be transmitted, the delay circuit
determines how long the DS2409 will hold the data line low overriding the 1 generated by the master. If
the data bit is a “1”, the device will leave the read data time slot unchanged.
相關PDF資料 |
PDF描述 |
|---|---|
| DS2409P | MicroLAN Coupler |
| DS2422 | 1-Wire Temperature/Datalogger with 8kB Datalog Memory |
| DS2422S | 1-Wire Temperature/Datalogger with 8kB Datalog Memory |
| DS2482-800 | Eight-Channel 1-Wire Master |
| DS2482-100 | Single-Channel 1-Wire Master |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS2409FRAB0 | 制造商:Thomas & Betts 功能描述:200A,REC,3P4W,MG,3P220V,SC |
| DS2409MP000 | 制造商:Thomas & Betts 功能描述:200A,PLG,3P4W,MG,409,3P220V |
| DS2409P | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產品類型: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 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
| DS2409P/T&R | 制造商:Maxim Integrated Products 功能描述:IC COUPLER MICROLAN 1-WIRE 6TSOC |
| DS2409P/T&R | 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產品類型: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 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
發(fā)布緊急采購，3分鐘左右您將得到回復。