COMポートアダプタ

型番	ステータス	推奨置換品	説明
DS9097	この製品は新規設計用に推奨されていません。入手不可(No Longer Available)または製造中止で最終購入(Last Time Buy)の対象となっているバージョンもあります。最終購入の対象となっているものについては新規の注文を受け付けることができません。詳細についてはオーダー情報をご覧ください。	DS9097U-009 DS9097U-S09	類似製品、ほとんどのソフトウェアドライバが認識します。
DS9097E	この製品は新規設計用に推奨されていません。	DS9097U-E25	類似製品、ほとんどのソフトウェアドライバが認識します。

The DS9097 COM port adapter is a simple, low-cost passive adapter which performs RS-232C (±12V) level conversion, allowing an iButton® probe to be connected to the serial port of a computer so that a non-EPROM iButton can be read and written directly. It can also read all EPROM-based iButtons. The serial port must support a data transmission rate of 115.2kbps in order to create the 1-Wire® time slots correctly. Nearly all PCs support the required data rate and are fully compatible with the DS9097. Since an 8-bit character (6 data bits plus start and stop bit) on the RS-232 port operating at 115.2kbps is used to form a single 1-Wire time slot, the maximum effective 1-Wire transfer rate is 14.4kbps (regular speed). Details on the operation of the DS9097 including software examples are found in application note 74, Section V.

The DS9097E is an upgraded version of the DS9097 that is capable of supplying the 12 volts necessary to program the EPROM-based iButton products (DS198x Add-Only iButtons) in addition to reading and writing SRAM and EEPROM-based devices (DS199x, DS196x, DS197x). When combined with the appropriate software, the DS9097E can be used in a standalone mode where all of the programming current is supplied by the serial port itself. In this configuration, the maximum number of EPROM bits that can be programmed simultaneously is four on a typical serial port. For higher performance, the above mentioned 12V auxiliary supply can be plugged into the power jack on the DS9097E and with proper software enable the serial port to program up to eight EPROM bits simultaneously.

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