Instruction/ maintenance manual of the product 8x930Ax Cypress
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Cypress Semi conductor Cor poration • 3901 Nor th First Stree t • San Jos e • C A 95134 • 408-9 43-2600 Feb ruar y 25, 2 000 Con verting fr om Intel 8x930A x to Cypre ss EZ -USB Intr oduction In 1999, Cypr ess p artnered with Intel in an excl usiv e prod uct li censing agre ement f or the USB Intel produc t f amily .
Con ver ting f r om Intel 8x93 0Ax to Cypress E Z-USB 2 Figure 1. Ho w the 8x930Ax Hand l es a “Ge t Descr iptor” Request Figur e 2. EZ-USB Logic Does Most of the W ork f or a “Get Descriptor .
Con ver ting f r om Intel 8x93 0Ax to Cypress E Z-USB 3 T a bl e 1 sho ws the r esult s of our compi lation and a com pari- son o f th e same f unction implemented using EZ-USB . It is the m an ner in whi ch EZ- USB handles t he USB pr o t oc ols that will need to be addr essed when con v er ting fr om the Int el 8x930Ax t o the EZ-USB f amily .
Con ver ting f r om Intel 8x93 0Ax to Cypress E Z-USB 4 tus , the y can be e xpanded to 64- byt e maxim um pac ket siz es, which will impr ov e USB thr oughput. F or isochr onous desi gns, endp oints wi ll need to be conv er ted from end- point 1 t o endpoin ts 8 th rough 15.
Con ver ting f r om Intel 8x93 0Ax to Cypress E Z-USB 5 10.P assiv e Netw orks Both the 8x 930Ax and EZ-USB h av e act iv e-HIGH RESET pins , b ut while t he 8x930Ax r equires only a cap acitor t o V CC , t he EZ-USB f amil y par ts r equire a r esi stor-capac itor netw or k.
Con ver ting f r om Intel 8x93 0Ax to Cypress E Z-USB 6 cam f or video cap ture o ver the USB b us, wh i l e off er in g high- quality video moti on and vi deo captur e perf o r mance . The f oll owing schemat ic (Exhi bit A) incl udes on ly t he USB por t ion of the r ef er ence design.
Con ver ting f r om Intel 8x93 0Ax to Cypress E Z-USB © Cypres s S e mi c onductor Corporation, 1 999. The information c ontained herein is subject to change without no ti c e. Cypress Semi co nductor Corporation assumes no responsibility f or the use of any circui tr y other than circuitry embodied in a Cypress Semicon ductor product.
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If you already are a holder of Cypress 8x930Ax, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Cypress 8x930Ax.
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