Manuale d’uso / di manutenzione del prodotto CY7C0251AV del fabbricante Cypress
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CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V 3.3V 4K/8K/16K x 16/18 Dual-Port S tatic RAM Cypress Semiconducto r Corporation • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600 Document #: 38-06052 Rev .
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 2 of 19 Pin Configurations Figure 1. 100- P in TQ FP (T op View) Notes 6.
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 3 of 19 Figure 2. 100- P in TQ FP (T op View) Notes 8. A 12L on the CY7C0251A V .
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 4 of 19 Figure 3. 100- P in TQ FP (T op View) Pin Configurations (continued) 100 99 97 98 96 2 3 1 42 41 59.
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 5 of 19 Architecture The CY7C024A V/024BV/025A V/026A V and CY7C0241A V/0251A V/036A V consist of an array of 4K, 8K, and 16K words of 16 and 18 bits each of dual-port RAM cells, IO and address lines, and control signals (CE , OE , RW ).
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 6 of 19 3FFF for the CY7C026A V/36A V) is the mailbox for the right port and the second highest memory location (FFE for the CY7C024A V/024BV/41A V/1F FE for the CY7C0 25A V/51A V , 3FFE for the CY7C02 6A V/36A V) is the mailb ox for the left port.
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 7 of 19 T able 1 . Non-Conten ding Read/W rite Inputs Outpu ts Operation CE R/W OE UB LB SEM IO 9 – IO 17.
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 8 of 19 Maximum Ratings Exceeding maximum ratings [14] may shorten the useful life of th e device. User guidelines are not te ste d. S torage T emperature ...
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 9 of 19 Figure 4. AC T est Load s an d W aveforms 3.0V GND 90% 90% 10% 3n s 3 ns 10% ALL INPUT PULSES (a) Normal Load (Load 1) R1 = 590 Ω 3.3V OUTPUT R2 = 435 Ω C= 3 0 pF V TH =1 .
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 10 of 19 Dat a Retention Mode The CY7C024A V/024BV/025A V/026A V and CY7C0241A V/0251A V/036A V are designed for battery backup. Data retention voltage and supply current are guaranteed over temperature.
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 1 1 of 19 Switching W aveforms Notes 29. R/W is HIGH for read cycles. 30. Device is continuously selected C E = V IL and UB or LB = V IL . This waveform cann ot be used for semaph ore reads.
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 12 of 19 Notes 34. R/W or CE must be HIGH during all address transitions. 35. A write occurs during the overlap (t SCE or t PWE ) of a LOW CE or SEM and a LOW UB or LB .
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 13 of 19 Notes 43. CE = HIGH for the duration of the above timing (both write and re ad cycle). 44. IO 0R = IO 0L = LOW (request semaphore); CE R = CE L = HIGH.
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 14 of 19 Note 47. CE L = CE R = LOW . Switching W aveforms (continued) VA L I D t DDD t WDD MA TCH MA TCH R/W R DA T A IN R DA T A OUTL t WC ADDRESS R t PWE VA L I D t SD t HD ADDRESS L t PS t BLA t BHA t BDD BUSY L Figure 12.
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 15 of 19 Note 48. If t PS is violated, the busy signal is asserted on one side or the ot her , but there is no guarantee to which side BUSY is asserted.
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 16 of 19 Notes 49. t HA depends on which en able pin (CE L or R/W L ) is deasserted fir s t. 50. t INS or t INR depends on which enable pin (CE L or R/W L ) is assert ed la st.
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 17 of 19 Ordering Information 4K x16 3.3V Asynchronous Dual -Port SRAM Spee d (ns) Orderin g Co de Package .
CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V Document #: 38-06052 Rev . *J Page 18 of 19 Package Diagram Figure 17. 100-Pin Pb-Free Thin Plastic Quad Flat Pack (T QFP) A100 16K x18 3.
Document #: 38-06052 Rev . *J Revised December 10, 2008 Page 19 of 19 All products and c ompany names men tioned in th is document m ay be the tr ademarks o f t h eir respect i v e holders. CY7C024A V/024BV/025A V/026A V CY7C0241A V/0251A V/036A V © Cypress Semicondu ctor Corpor ation, 2001-200 8.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Cypress CY7C0251AV è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Cypress CY7C0251AV - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Cypress CY7C0251AV imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Cypress CY7C0251AV ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Cypress CY7C0251AV, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Cypress CY7C0251AV.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Cypress CY7C0251AV. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Cypress CY7C0251AV insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
