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Cypress Semiconductor CY14B101K manual

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Table of contents for the manual

  • Page 1

    CY14B101K 1 Mbit (128K x 8) nvSRAM With Real T ime Clock Cypress Semiconductor Corpora tion • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600 Document Number: 001-06401 Rev . *I Revised February 24, 2009 Features ■ 25 ns, 35 ns, and 45 ns access times ■ Pin compatible with STK17T A8 ■ Data integrity of Cypress nvSR AM combi[...]

  • Page 2

    CY14B101K Document Number: 001-06401 Rev . *I Page 2 of 28 Pin Configurations Figure 1. 48-Pin SSOP T a ble 1. Pin Definitions Pin Name Alt IO T ype Description A 0 – A 16 Input Address Inputs. Used to select one of the 131,072 bytes of the nvSRAM. DQ0 – DQ7 Input Ou tp ut Bidirectiona l Data IO Lines. Used as input or output lines dependin g o[...]

  • Page 3

    CY14B101K Document Number: 001-06401 Rev . *I Page 3 of 28 Device Operation The CY14B101K nvSRAM consis ts of two fun ctional comp o- nents paired in the same physical cell. The componen ts are SRAM memory cell and a nonvolatile QuantumTrap cell. The SRAM memory cell operates as a standard fast static RAM. Data in the SRAM is transferred to the non[...]

  • Page 4

    CY14B101K Document Number: 001-06401 Rev . *I Page 4 of 28 SRAM READ and WRITE operations that are in progress when HSB is driven LOW by any means are given time to complete before the STORE operation is initiated. After HSB goes LOW , the CY14B101K continues SRAM operation s for t DELA Y . During t DELA Y , multiple SRAM READ operations take place[...]

  • Page 5

    CY14B101K Document Number: 001-06401 Rev . *I Page 5 of 28 Low A verage Active Power CMOS technology provides the CY14B10 1K the benefit of drawing significantly le ss current when it is cycled at times longer than 50 ns. Figure 3 shows the relationship be tween I CC and READ/WRITE Cycle T ime. The worst ca se current consumption is shown for comme[...]

  • Page 6

    CY14B101K Document Number: 001-06401 Rev . *I Page 6 of 28 T a ble 2. Mode Sele ction CE WE OE A15 – A0 Mode IO Power H X X X Not Selected Output High Z S tandby L H L X READ SRAM Output Data Active L L X X WRITE SRAM Input Data Active L H L 0x4E38 0xB1C7 0x83E0 0x7C1F 0x703F 0x8FC0 Read SRAM Read SRAM Read SRAM Read SRAM Read SRAM Nonvolatile ST[...]

  • Page 7

    CY14B101K Document Number: 001-06401 Rev . *I Page 7 of 28 Real Time Clock Operation nvTIME Operation The CY14B101K offers internal register s that contain clock, alarm, watchdog, interrupt, and co ntro l functions. RTC registers use the last 16 address locati ons of the SRAM. Intern al double buffering of the clock and the clock or timer informati[...]

  • Page 8

    CY14B101K Document Number: 001-06401 Rev . *I Page 8 of 28 Calibrating the Clock The RTC is driven by a quartz controlled oscillator with a nominal frequency of 32.768 kHz. Clock accu racy depends on the quality of the crystal and calibration. The crystal oscillators typically have an error of + 20ppm to + 35ppm. However , CY14B101K employs a calib[...]

  • Page 9

    CY14B101K Document Number: 001-06401 Rev . *I Page 9 of 28 Power Monitor The CY14B101K provides a power management sch eme with power fail interru pt capability . It also controls the inte rnal switch to backup po wer for the cl ock and prot ects t he memory from lo w V CC access. The power monitor is b ased on an internal band gap reference circui[...]

  • Page 10

    CY14B101K Document Number: 001-06401 Rev . *I Page 10 of 28 Figure 5. Interrupt Block Diagram Figure 6. RTC Recommende d Componen t Configurati on WDF - W atchdog T imer Flag WIE - W atchdog I nterrupt PF - Power Fai l Flag PFE - Power F ail Enable AF - Alarm Flag AIE - Ala rm Interrup t Enable P/L - Pulse Le vel H/L - High /Low Enable W atchdog T [...]

  • Page 11

    CY14B101K Document Number: 001-06401 Rev . *I Page 1 1 of 28 T a ble 4. RTC Register Map [5, 6] Register BCD Format Data [5 ] Fu nction/Range D7 D6 D5 D4 D3 D2 D1 D0 0x1FFFF 10s Y ears Y ears Y ears: 00–99 0x1FFFE 0 0 0 10s Months Months Months: 01–12 0x1FFFD 0 0 10s Day of Month Day Of Month Day of Month: 01–31 0x1FFFC 0 0 0 0 0 Day of Week [...]

  • Page 12

    CY14B101K Document Number: 001-06401 Rev . *I Page 12 of 28 T a ble 5. Register Map Detail 0x1FFFF Time Keeping - Y ears D7 D6 D5 D4 D3 D2 D1 D0 10s Y ears Y ears Contains the lower two BCD digits of the year . Lower nibble (four bits) contains the value for years; upper nibble (four bits) contains the value for 10s of years. Each nibble operates f[...]

  • Page 13

    CY14B101K Document Number: 001-06401 Rev . *I Page 13 of 28 0X1FFF8 Calibration/Con trol D7 D6 D5 D4 D3 D2 D1 D0 OSCEN 0 Calibration Sign Calibration OSCEN Oscillator Enable. When set to 1, the oscillator is stopped. Wh en set to 0, the oscillator runs. Disabling the oscillator saves battery or capacitor power during storage. Calibration Sign Deter[...]

  • Page 14

    CY14B101K Document Number: 001-06401 Rev . *I Page 14 of 28 0x1FFF4 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 ma sk bit to select or desele ct the hours value. M Ma tch. When this bit is set to 0, the hours value is used in the alarm match. Setting this bit to 1 causes the mat[...]

  • Page 15

    CY14B101K Document Number: 001-06401 Rev . *I Page 15 of 28 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 ............. .............. ...... –65 ° C to +150 ° C Ambient T emperat ure with Power Applied ....... ............................ ......[...]

  • Page 16

    CY14B101K Document Number: 001-06401 Rev . *I Page 16 of 28 Dat a Retention and Endurance Parameter Description Min Unit DA T A R Data Retention 20 Y ears NV C Nonvolatile STORE Operations 200 K Cap acitance These parameters are guaranteed but not tested. Parameter Description T est Conditions Max Unit C IN Input Capacitance T A = 25 ° C, f = 1 MH[...]

  • Page 17

    CY14B101K Document Number: 001-06401 Rev . *I Page 17 of 28 AC Switching Ch aracteristics Parameter Description 25 ns 35 ns 45 ns Unit Min Max Min Max Min Max Cypress Parameter Alt. Parameter SRAM Read Cycle t ACE t ELQV Chip Enable Access Time 25 35 45 ns t RC [1 1] t AVAV, t ELEH Read Cycle Time 25 35 45 ns t AA [12] t AV Q V Address Access T ime[...]

  • Page 18

    CY14B101K Document Number: 001-06401 Rev . *I Page 18 of 28 AC Switching Ch aracteristics (continued) Parameter Description 25 ns 35 ns 45 ns Unit Min Max Min Max Min Max Cypress Parameter Alt. Parameter SRAM Write Cycle t WC t AVAV Write Cycle T ime 25 35 45 ns t PWE t WL WH, t WLEH Writ e Pulse Width 20 25 30 n s t SCE t EL WH, t ELEH Chip Enab l[...]

  • Page 19

    CY14B101K Document Number: 001-06401 Rev . *I Page 19 of 28 AutoStore or Power Up RECALL Parameter Descrip tion CY14B101K Unit Min Max t HRECALL [18] Power Up RECALL Duration 40 ms t STORE [19, 20] STORE Cycle Duration Commercial 12.5 ms Industrial 15 ms V SWITCH Low V oltage T rigger Level 2.65 V t VCCRISE VCC Rise T ime 150 μ s Figure 12. AutoSt[...]

  • Page 20

    CY14B101K Document Number: 001-06401 Rev . *I Page 20 of 28 Sof tware Con trolled STORE/RECALL Cycles [21, 22] Parameter Alt. Parameter Description 25 ns 35 ns 45 ns Unit Min Max Min Max Min Max t RC t AVAV STORE/RECALL Initiation Cycle Ti m e 25 35 45 ns t SA t A VEL Address Setup T ime 0 0 0 ns t CW t ELEH Clock Pulse Width 20 25 30 ns t HA t EHA[...]

  • Page 21

    CY14B101K Document Number: 001-06401 Rev . *I Page 21 of 28 Hardware STORE Cycle Parameter Alt. Parameter Description CY14B101K Unit Min Max t DELA Y [25] Time Allowed to Comp lete SRAM Cycle 1 70 μ s t PHSB t HLHX Hardware STORE Pulse Width 15 ns Figure 15. Hardware STORE Cycle Sof t Sequence Commands Parameter Description CY14B1 01K Unit Min Max[...]

  • Page 22

    CY14B101K Document Number: 001-06401 Rev . *I Page 22 of 28 RTC Characteristics Parameter Description T est Conditions Min Max Unit I BAK [26] RTC Backup Current Commercial 300 nA Industrial 350 nA V RTC ba t [27] RTC Battery Pin V olt age 1.8 3.3 V V RTC ca p [28] RTC Capacitor Pin V oltage 1.2 2.7 V tOCS RTC Oscillator T ime to S tart At Min T em[...]

  • Page 23

    CY14B101K Document Number: 001-06401 Rev . *I Page 23 of 28 Part Numbering Nomenclature Option: T - T ape and Reel Blank - S td. S peed: 25 - 25 ns Data Bus: K - x8 + R TC Density: 101 - 1 Mb V oltage: B - 3.0V Cypress NVSRAM 14 - AutoStore + Software Store + Hardware Store Package: SP - 48 SSOP 35 - 35 ns T emperature: C - Commercial (0 to 70°C) [...]

  • Page 24

    CY14B101K Document Number: 001-06401 Rev . *I Page 24 of 28 Ordering Information All the below mentioned parts are Pb-free. Please contact your local Cypress sales representative for availability of these parts. Spee d (ns) Ordering Co de Package Diagram Package T ype Operating Range 25 CY14B101K-SP25XC 51-850 61 48-pin SSOP Commercial CY14B101K-SP[...]

  • Page 25

    CY14B101K Document Number: 001-06401 Rev . *I Page 25 of 28 Package Diagrams Figure 17. 48-Pin Shrunk Small Outline Package (51-85061) 51-85061-* C [+] Feedback[...]

  • Page 26

    CY14B101K Document Number: 001-06401 Rev . *I Page 26 of 28 Document History Page Document Title: CY14B101K 1 Mbit (128 K x 8) nvSRAM With Real T ime Clock Document Number: 001-06401 REV . ECN NO. Orig. of Change Submission Date Description of Chan ge ** 425138 TUP See ECN New data sheet *A 437321 TUP See ECN Show data sheet on External Web *B 4719[...]

  • Page 27

    CY14B101K Document Number: 001-06401 Rev . *I Page 27 of 28 *I 2663934 GVCH/PYRS 02/24/09 Updated Features Updated pin definition of WE Removed AutoS tore enable/disable sectio n Added Best practices Updated “Reading the clock”, “Backup Power”, “Stopping and starting the Oscillator” and “Alarm” descriptions under RTC operation Modif[...]

  • Page 28

    Document Number: 001-06401 Rev . *I Revised February 24, 2009 Page 28 of 28 AutoS tore and QuantumT rap are registered trademar ks of Cypress Semiconductor Corporation . All products and compa ny names mentio ned in this document are the trademarks of their respect i ve holders. CY14B101K © Cypress Sem iconductor Corp oration, 2006-2009. The infor[...]