Manuale d’uso / di manutenzione del prodotto CY14B104K del fabbricante Cypress
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PRELIMINARY CY14B104K, CY14B104M 4 Mbit (512K x 8/256K x 16) nvSRAM with Real T ime Clock Cypress Semiconductor Corpora tion • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600 Document #: 001-07103 Rev .
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 2 of 31 Pinout s Figure 1. Pi n Diagram - 44-P In and 54 -Pin TSOP II T able 1. Pin Definitions Pin Name I/O T ype Description A 0 – A 18 Input Address Inputs Used to Select one of the 524,288 bytes of the nvSRAM for x8 Configuration .
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 3 of 31 Device Operation The CY14B104K/CY14B104M nvSRAM is made u p of two functional components paired in the same physical cell. These are a SRAM memory cell and a nonvolatile Qua ntumT rap cell.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 4 of 31 power-on-recall, the MPU must be active or the WE held inactive until the MPU comes out of reset.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 5 of 31 Preventing AutoStore The AutoS tore function is disabled by initiati ng an AutoS tore disable sequence. A sequence of read ope rations is performed in a manner si milar to the Software STORE initiation.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 6 of 31 Dat a Protection The CY14B104K/CY14B104M prot ects data from corruption during low voltage conditio ns by inhibiting all externally initiated STORE and write operations. The low voltage condition is detected w hen V CC is less than V SWITCH .
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 7 of 31 must be set to ‘1’. This turns off the oscillator circuit, extending the battery life. If the OSCEN bit goes from disabled to ena bled, it takes approximately one second (two seconds maximum) for the oscillator to start.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 8 of 31 New time out values are written b y setting the watchd og write bit to ‘0’. When the WDW is ‘0’, new writes to the watchdog time out value bits D5-D0 are enabled to modify the time out value .
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 9 of 31 Figure 4. RTC Rec ommended Component Co nfiguration Figure 5. Interrupt Block Diagram Recommended V alues Y 1 = 32.768 KHz (6 pF) C 1 = 21 pF C 2 = 21 pF X 1 X 2 Y1 C2 C1 Note: The recommende d values for C1 and C2 incl ude board trace capacit ance.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 10 of 31 T able 4. RTC Register Map [8] Register BCD Format Data [9] Function/Range CY14B104K CY14B104M D7 D6 D5 D4 D3 D2 D1 D0 0x7.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 1 1 of 31 T able 5. Register Map Detail Register Description CY14B104K CY14B104M 0x7FFFF 0x3FFFF Time Keeping - Y ears D7 D6 D5 D4 D3 D2 D1 D0 10s Y ea rs Y ears Contains the lower two BCD digits of the year .
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 12 of 31 Register Description CY14B104K CY14B104M 0x7FFF8 0x3FFF8 Calibration/Control D7 D6 D5 D4 D3 D2 D1 D0 OSCEN 0 Calibration Sign Calibration OSCEN Oscillato r Enable. When set to 1, the oscillator is stopped.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 13 of 31 Register Description CY14B104K CY14B104M 0x7FFF4 0x3FFF4 Alarm - Hours D7 D6 D5 D4 D3 D2 D1 D0 M 10s Alarm Hours Alarm Hours Contains the alarm value for the hours and the mask bi t to select or deselect the hours value.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 14 of 31 Maximum Ratin gs Exceeding maximum ratings may impair the useful life of the device. These user guid elines are not tested. S torage T emperature ................ ..........
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 15 of 31 AC T est Conditions Input Pulse Levels ..................... ........... .............. ...... 0V to 3V Input Rise and Fall T imes (10% - 90%) ..... ................. .. < 3 ns Input and Output T iming Reference Levels .
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 16 of 31 T able 6. RTC Characteristics Parameters Description T est Conditions Min Ty p Max Units I BAK [15] RTC Backup Current Room T emperature (25 o C) 300 nA Hot T emperature (85 o C) 450 nA V RTC ba t RTC Battery Pin V oltage 1.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 17 of 31 AC Switching Characteristics Parameters Description 20 ns 25 ns 45 ns Unit Cypress Parameters Alt Parameters Min Max Min M.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 18 of 31 Switching W aveforms Figure 8. SRAM Read Cycle 2: CE Controlled [3 , 16, 20] Figure 9.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 19 of 31 Switching W aveforms Figure 10. SRAM Write Cycle 2: CE Con trolled [3, 19, 20, 21] Figure 1 1 .
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 20 of 31 AutoStore/Power Up RECALL Parameters Descrip tion 20 ns 25 ns 45 ns Unit Min Max Min Max Min Max t HRECALL [23] Power Up R.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 21 of 31 Sof tware Controlled ST ORE and RECALL Cycle In the following table, the software controlled STORE and RECALL cycle p arameters are listed.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 22 of 31 Hardware STORE Cycle Parameters Description 20 ns 25 ns 45 ns Unit Min Max Min Max Min Max t DHSB HSB T o Output Active Time when write latch not set 20 25 25 ns t PHSB Hardware STORE Pulse Wid th 15 15 15 ns Switching W aveforms Figure 15.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 23 of 31 T ruth T able For SRAM Operations HSB should remain HIGH for SRAM Operations.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 24 of 31 Part Numbering Nomenclature Option: T - T ape & Reel Blank - S td. S peed: 20 - 20 ns 25 - 25 ns Data Bus: K - x8 + RT C M - x16 + RTC Density: 104 - 4 Mb V oltage: B - 3.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 25 of 31 Ordering Information Spee d (ns) Ordering Code Pac kage Diagram Package T ype Operating Range 20 CY14B104K-ZS20XCT 51-8508.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 26 of 31 Package Diagrams Figure 17. 44-Pin TSOP II (51-85087) MAX MIN. DIMENSION IN MM (INCH) 11.938 (0.470) PLANE SEATING PIN 1 I.D. 44 1 18.517 (0.729) 0.800 BSC 0° -5° 0.400(0.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 27 of 31 Figure 18. 54-Pin TSOP II (51-85160) Package Diagrams (continued) 51-85160 ** [+] Feedback.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 28 of 31 Document History Page Document Title: CY14B104K/CY14B104M 4 Mbit (512K x 8/256K x 16) nvSRAM with Real Time Clock Document Number: 001-07103 Rev . ECN No. Submi ssion Date Orig.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 29 of 31 *F 1890926 See ECN vsutmp8/AE- SA Added Footnote 1, 2 and 3. Updated Logic Block d iagram Updated Pin definition T able Changed 8Mb Address expansion Pin from Pin 43 to Pin 42 for 44-TSOP II (x8 ) package.
PRELIMINARY CY14B104K, CY14B104M Document #: 001-07103 Rev . *K Page 30 of 31 *I 2519319 06/20/08 GVCH/PYRS Added 20 ns access speed in “Features” Added I CC1 for tRC=20 ns for b oth industrial an.
Document #: 001-07103 Rev . *K Revised January 29, 2009 Page 31 of 31 AutoS tore and Qu antumT rap are re gistered tradem arks of Cypress Semico nductor Corpora tion. All product s and compa ny names mentio ned in this document are th e trademarks of their resp ective holders.
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 CY14B104K 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 CY14B104K - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Cypress CY14B104K imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Cypress CY14B104K ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Cypress CY14B104K, 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 CY14B104K.
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 CY14B104K. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Cypress CY14B104K 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.
