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參數(shù)資料
| 型號(hào)： | DS1411 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Serial Port iButton Holder(串行端口按鈕保持器) |
| 中文描述： | 串口iButton托架 |
| 文件頁(yè)數(shù)： | 1/1頁(yè) |
| 文件大小： | 29K |
| 代理商： | DS1411 |
DS1411
Serial Port iButton
TM
Holder
DS1411
ADVANCED INFORMATION
020698 1/1
FEATURES
Small size, true–ground interface to an RS232 COM
Port for reading and writing iButton devices
Works with bipolar logic signals of
±
5V to
±
12V
(RS232C) as well as unipolar signals of 5V to 12V
Supports reading and writing at regular and Overdrive
speeds
Provides strong pullup to 5V for Temperature iButton,
Crypto iButton and EEPROM iButton
Communicates at data rates of 9.6k (default), 19.2k,
57.6k and 115.2k bits/s
Powered entirely from an RS232 interface
Standard DB female connector for mating to the COM
Port of a computer with DS9098 iButton Retainer for
a single iButton or MicroLAN Cable (DS1402x)
RS232
COM PORT
RTS
DTR
RXD
TXD
GND
5V
REG.
6 5
2
7
1
8
4
DS
2480
SCHEMATIC
33 mm
38 mm
17 mm
ORDERING INFORMATION
DS1411
DB–9 Connector
DESCRIPTION
The DS1411 is a sophisticated RS232 to 1–Wire
TM
adapter and iButton holder which performs RS232 level
conversion and actively generates the 1–Wire commu-
nication signals. Together with an adequate TMEX soft-
ware driver it enables an IBM–compatible PC or laptop
computer to directly read all and write any non–EPROM
iButton devices. The DS1411 has a DS9098 retainer for
a single F5 MicroCan and can replace the DS9097U–09
in applications that use only a single iButton. Multiple
iButtons can be connected using standard MicroLAN
Cables and button holders (see DS1401 and DS1402x
data sheets). 1–Wire communication is supported by
the adapter for regular as well as Overdrive speed. The
serial port must support a data transmission rate of 9600
bits/s. Under software control, the adapter can be set up
for RS232 data rates of 19200, 57600 and 115200 bits
per second. The two higher rates are recommended for
communication at Overdrive speed with Overdrive
capable devices. Since the DS1411 operates in a byte
mode, every data byte received from the RS232 port
generates eight time slots on the 1–Wire bus.
The DS1411 is based on the DS2480 Serial 1–Wire Line
Driver chip and therefore is
not a plug–in
replacement
for the DS1412
Serial Port Adapter. The RXD/ TXD
Polarity Select input of the DS2480 is tied to V
DD
(non–
inverting).
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