![]() It can also be purchased from the following:Ī schematic for a serial port-based adapter similar to the DS9097U-E25 that supports EPROM The following +12V DC wall adapter has been Tolerance and current levels required to program devices. Power jack polarity mustīe observed: center contact is ground and outer contact is +12V. ![]() Used to attach either power from a bench supply or common AC wall adapter. As shown in Figure 2, a 2.1mm power jack is Provides this capability when supplied with +12V DC power. Programming EPROMs requires the application of a +12V DC programming pulse. ![]() DS9097U-E25 1-Wire Serial Port Adapter And +12V Pinouts. 1-Wire Serial Port Adapters Adapterįigure 2. The RJ-11 pinout applies to all port adapters in Table 1. TheĭS9097U-E25 is the recommended model for EPROM programming. TheĭS9097U-009 and the DS9097U-S09 are the recommended models for EEPROM programming. The DS9097U are the current generation adapters. See Table 1 for a comparison of port adapter capabilities relative toĮEPROM/EPROM reading and programming. PC-Based Programming Configuration.ĭallas Semiconductor offers a variety of adapters that convert Serial COM port communication to 1-Wire Port, a Dallas Semiconductor serial to 1-Wire port adapter, and cabling to attach 1-Wire devices forįigure 1. Required items include a Windows™ (98, 95, ME, 2K) based PC with a spare serial (COM) Shown in Figure 1 is a typical PC based Hardware configuration for 1-Wire EEPROM and EPROM Platform simplifies this task and is the scope of this document. ![]() While these devices are commonly programmed in an embedded application, it is oftenĭesirable or necessary to preprogram devices with data for prototyping purposes. Dallas Semiconductor offers hardware/software solutions for programming DS243x series EEPROM andĭS250x series EPROM devices (or the DS197x and DS198x iButton form factors) in a PC-basedĮnvironment. ![]()
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