Manuale d’uso / di manutenzione del prodotto CY14B101Q1 del fabbricante Cypress
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PRELIMINARY 1 Mbit (128K x 8) Serial SPI nvSRAM CY14B101Q1 CY14B101Q2 CY14B101Q3 Cypress Semiconductor Corpora tion • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600 Document #: 001-50091 Rev .
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 2 of 22 Pinout s Figure 1. Pin Diagr am - 8-Pin DFN [1, 2, 3] Figure 2. Pin Diagram - 16-Pin SOIC T able 1. Pin Definitions Pin Name I/O T ype Description CS Input Chip Select .
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 3 of 22 Device Operation CY14B101Q1/CY14B101Q2/CY14 B101Q3 is 1 Mbit nvSRAM memory with a nonvolatile element in each memory cell.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 4 of 22 capacitor (V CAP ) and enables the device to sa fely STORE the data in the nonvolatile memory when power goes down. During normal operation, the device draws current from V CC to charge the capacitor connected to the V CAP pin.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 5 of 22 Note CY14B101Q2/CY14B101 Q3 has AutoS t ore Enabled fro m the factory . In CY14 B101Q1, V CAP pin is not present and AutoS tore opti on is not available. The Autosto re Enable and Disable instructio ns to CY14B101Q1 are ignored.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 6 of 22 SPI Modes CY14B101Q1/CY14B101Q2/CY14 B101Q3 may be driven by a microcontroller with its SPI periph eral running.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 7 of 22 SPI Operating Features Power Up Power up is defined as the co ndition when the power supply i s turned on and V CC crosses Vswitch voltage. During this time, the Chip Select (CS ) must be allow ed to follow the V CC voltage.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 8 of 22 St atus Register The status register bits are listed in Ta b l e 3 . T he status register consists of Ready bit (RDY ) and data protection bits BP1, BP0, WEN, and WPEN.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 9 of 22 Write Protection and Block Protection CY14B101Q1/CY14B101 Q2/CY1 4B101Q3 provides features for both software and hardware write protection using WRDI instruction and WP .
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 10 of 22 Writ e Protect (WP ) Pin The write protect pin (WP ) is used to provide hardware wri te protecti on. WP pin enables all normal read and write operations when held HIGH.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 1 1 of 22 nvSRAM Special Instructions CY14B101Q1/CY14B101 Q2/CY14B101Q3 provides four special instructions which enables access to four nvSRAM specific functions: ST ORE, RECALL, ASDISB, and ASENB.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 12 of 22 bit is cleared on the positive ed ge of CS following the STORE instruction . Sof tware RECALL When a RECALL instruction is executed, nvSRAM performs a Software RECALL operation.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 13 of 22 Maximum Ratin gs Exceeding maximum ratings may shorten the useful life of the device. These user guid elines are not tested. S torage T emperature ..............
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 14 of 22 AC T est Conditions Input Pulse Levels .................. .............. .................... 0V to 3V Input Rise and Fall T imes (10% - 90%) .... ..............
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 15 of 22 AC Switching Characteristics Cypress Parameter Alt. Parameter Description 40MHz Unit Min Max f SCK f SCK Clock.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 16 of 22 AutoS tore or Power Up RECALL Parameters Description CY‘4B101QxA Unit Min Max t FA [7] Power Up RECALL Durati on 20 ms t STORE [8] ST ORE Cycle Duration 8m s t DELA Y [9] T ime Allowed to Comp lete SRAM Cycle 25 ns V SWITCH Low V o ltage T rigger Level 2.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 17 of 22 Sof tware Controlled STORE and RECALL Cycles Parameter Des cription CY14B101Q1 Unit Min Max t RECALL RECALL Duration 200 μ s t SS [12, 13] Soft Sequence Processing T ime 100 μ s Switching W aveforms Figure 24.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 18 of 22 Hardware STORE Cycle Parameter Description CY14B101Q1 Unit Min Max t DHSB HSB T o Ou tput Active T ime when write latch not set 25 ns t PHSB Hardware STORE Pulse Wid th 15 ns Switching W aveforms Figure 26.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 19 of 22 Ordering Information Ordering Co de Package Diagram Package T ype Operating Range CY14B101Q1-LHXIT 001- 50671 .
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 20 of 22 Package Diagrams Figure 27. 8-Pin (300 mil) DFN Package (001-50671) 1. ALL DIMEN SIONS ARE IN MILLIMETERS 3. BASED ON REF JEDEC # MO- 240 EXCEPT DIMENSIONS (L) and (b) NOTES: 2.
PRELIMINARY CY14B101Q1 CY14B101Q2 CY14B101Q3 Document #: 001-50091 Rev . *A Page 21 of 22 Figure 28. 16-Pin (300 mil) SOIC (51-85022 ) Package Diagrams (continued) 51-85022 *B [+] Feedback.
Document #: 001-50091 Rev . *A Revised February 2, 2009 Page 22 of 22 AutoStore and Quantum Trap are trademarks of Cypress Semico nductor Corp . All products an d company names ment ioned in this d ocume nt ar e the trad emarks of their respe ctive ho lders.
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 CY14B101Q1 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 CY14B101Q1 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Cypress CY14B101Q1 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Cypress CY14B101Q1 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Cypress CY14B101Q1, 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 CY14B101Q1.
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 CY14B101Q1. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Cypress CY14B101Q1 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.
