DS2505為16k位只添加存儲(chǔ)器，可以識(shí)別和存儲(chǔ)與產(chǎn)品相關(guān)的信息。此篇主要介紹了DS2505 特性、應(yīng)用范圍、參考設(shè)計(jì)電路以及電路分析，幫助大家縮短設(shè)計(jì)時(shí)間。

DS2505特性：16384位電可編程只讀存儲(chǔ)器(EPROM);內(nèi)置多點(diǎn)控制器;將控制線、地址線、數(shù)據(jù)線、電源和可編程信號(hào)線集于一條總線;直接與微處理器的一個(gè)口線連接、通信速率可達(dá)16.3kbps

DS2505典型應(yīng)用范圍：配件與外設(shè)識(shí)別;醫(yī)用傳感器鑒定與校準(zhǔn);網(wǎng)絡(luò)節(jié)點(diǎn)識(shí)別

DS2505參考設(shè)計(jì)應(yīng)用電路：

圖1 DS2505內(nèi)部結(jié)構(gòu)圖

The DS2505 16k bits Add–Only Memory identifies and stores relevant information about the product to which it is associated. This lot or product specific information can be accessed with minimal interface, for example a single port pin of a microcontroller.

圖2 DS2505參考設(shè)計(jì)圖

The DS2505 has three main data components: 1) 64–bit lasered ROM, 2) 16384–bits EPROM Data Memory, and 3) 704–bits EPROM Status Memory.The device derives its power for read operations entirely from the 1–Wire communication line by storing energy on an internal capacitor during periods of time when the signal line is high and continues to operate off of this “parasite” power source during the low times of the 1–Wire line until it returns high to replenish the parasite (capacitor) supply.