Manuale d’uso / di manutenzione del prodotto CY7C1318CV18-250BZC del fabbricante Cypress
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18-Mbit DDR II SRAM 2-W ord Burst Architecture CY7C1318CV18 CY7C1320CV18 Cypress Semiconductor Corpora tion • 198 Champion Court • San Jose , CA 95134-1 709 • 408-943-2600 Document Number: 001-07160 Rev .
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 2 of 26 Logic Block Diagram (CY7C1318CV18) Logic Block Diagram (CY7C1320CV18) Wri te Reg Write Reg CLK A (19:0) Gen. K K Control Logic Address Register Read Add. Decode Read Data Reg. R/W Output Logic Reg.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 3 of 26 Pin Configuration The pin configuration for CY7C1318CV18 and CY7C 1320CV18 follow .
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 4 of 26 Pin Definitions Pin Name I/O Pin Description DQ [x:0] Input Output- Synchronous Dat a Input Output S ignals . Inputs are sampled on the rising edge of K and K clocks during valid write operations.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 5 of 26 DOFF Input DLL T urn Off − Active LOW . Connecting this pin to gro und turns off the DLL inside the device . The timing in the DLL tu rned off operation is diff erent from th at listed in this da ta sheet.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 6 of 26 Functional Overview The CY7C1318CV18, and CY7C1 320CV18 are synchronous pipelined Burst SRAMs equipped with a DDR interface , which operates with a read latency of o ne and half cycles when DOFF pin is tied HIGH.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 7 of 26 Programmable Impedan ce An external resistor , RQ, must be connected between the Z Q pin on the SRAM and V SS to e nable the SRAM to adjust its output driver impedance. The value of RQ must be 5x the value of th e intended line impedance d riven by the SRAM.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 8 of 26 T ruth T able The truth table for the CY7C1318CV18, and CY7C1320CV1 8 follows. [2, 3, 4, 5, 6, 7] Operation K LD R/W DQ DQ Write Cycle: Load address; wait one cycle; input write data on consecutive K and K rising edges.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 9 of 26 Write Cycle Descriptions The write cycle description t able for CY7C1 320CV18 follows. [2, 8] BWS 0 BWS 1 BWS 2 BWS 3 K K Comments LLLL L – H – D u r i n g t h e d a t a p o r t i o n o f a w r i t e s e quence, all fou r bytes (D [35:0] ) are written into the device.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 10 of 26 IEEE 1 149.1 Serial Boundary Scan (JT AG) These SRAMs incorporate a serial boundary scan T est Access Port (T AP) in the FBGA package. This part is fully compliant with IEEE S tandard #1 149.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 1 1 of 26 IDCODE The IDCODE instruction loads a vendor-specific, 32-bi t code into the instruction re gister . It also places the instruction re gister between the TDI and TDO pins and shifts the IDCODE out of the device when the T AP controller enters the Shift-DR state.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 12 of 26 T AP Controller St ate Diag ram The state diagram for the T AP controller follows.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 13 of 26 T AP Controller Block Diagram T AP Electrical Characteristics Over the Operating Range [10, 1 1 , 12] Parameter Description T est Conditions Min Max Unit V OH1 Output HIGH V oltage I OH = − 2.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 14 of 26 T AP AC Switching Characteristics Over the Operating Range [13, 14] Parameter Description Min Max Unit t TCYC TCK Clock Cycl.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 15 of 26 Identification R egi ster Definitions Instruction Field Va l u e Description CY7C1318CV18 CY7C1320CV18 Revision Number (31:2 9) 0 00 000 V ersion nu mber . Cy p r e ss D e vi c e ID ( 2 8: 1 2 ) 1 10101000100101 01 1 1010100010100101 D ef i n e s t h e ty p e of S R AM .
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 16 of 26 Boundary Scan Order Bit # Bump ID Bit # Bump ID Bit # Bump ID Bit # Bump ID 0 6R 28 10G 56 6A 84 2J 1 6 P2 9 9 G 5 7 5 B8 5 .
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 17 of 26 Power Up Sequence in DDR II SRAM DDR II SRAMs must be powered up and initialized in a predefined manner to prevent unde fined operation s. Power Up Sequence ■ Apply power and drive DOFF either HIGH or LOW (all other inputs can be HIGH or LOW).
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 18 of 26 Maximum Ratings Exceeding maximum ratin gs may impair the useful life of the device. These user guidelines are not teste d. S torage T emperature .................. ..........
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 19 of 26 I SB1 Automatic Power Down Current Max V DD , Both Ports Deselected, V IN ≥ V IH or V IN ≤ V IL f = f MAX = 1/t CYC , In.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 20 of 26 Switching Characteristics Over the Operating Range [20, 21] Cypress Parameter Consorti um Parameter Description 267 MHz 250 .
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 21 of 26 Output T imes t CO t CHQV C/C Clock Rise (or K/K in single clock mode) to Data V ali d – 0.45 – 0.45 – 0.45 – 0.50 ns t DOH t CHQX Data Output Hold af ter Output C/C Clock Rise (Active to Active) –0.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 22 of 26 Switching W aveforms Figure 5. Read/Write/Deselect Sequence [26, 27, 28] READ READ READ NOP NOP WRITE WRITE NOP 1 23 4 56 7 .
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 23 of 26 Ordering Information The table below contains only the parts that are currently available. If you don’t se e what you are looking for , please contact your local sales representative.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 24 of 26 Package Diagram Figure 6. 165-Ball FBGA (13 x 15 x 1.4 mm), 51-85180 51-85180-*B A 1 PIN 1 CORNER 15.00±0.10 13.00±0.10 7.00 1.00 Ø0.50 (165X) Ø0.25 M C A B Ø0.08 M C B A 0.
CY7C1318CV18 CY7C1320CV18 Document Number: 001-07160 Rev . *F Page 25 of 26 Document History Page Document Title: CY7C1318CV18/CY7C1320CV18, 18 -Mbit DDR II SRAM 2-Word Burst Architecture Document Number: 001-07160 Rev .
Document Number: 001-07160 Rev . *F Revised August 24, 2009 Page 26 of 26 QDR RAMs an d Quad Data R ate RAMs comprise a new family o f products deve loped by Cypress, I DT , NEC, Renesas, and Samsung. All pr oduct and comp any names m entioned in this document are the tr ademark s of their re specti ve 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 CY7C1318CV18-250BZC 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 CY7C1318CV18-250BZC - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Cypress CY7C1318CV18-250BZC imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Cypress CY7C1318CV18-250BZC ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Cypress CY7C1318CV18-250BZC, 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 CY7C1318CV18-250BZC.
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 CY7C1318CV18-250BZC. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Cypress CY7C1318CV18-250BZC 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.
