CypressメーカーCY14B101Kの使用説明書/サービス説明書
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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 .
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.
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.
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 .
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.
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.
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.
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.
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.
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 nterrup.
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: .
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.
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.
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.
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 .
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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.
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 .
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 .
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.
デバイスCypress CY14B101Kの購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Cypress CY14B101Kをまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはCypress CY14B101Kの技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Cypress CY14B101Kの取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Cypress CY14B101Kで得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Cypress CY14B101Kを既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はCypress CY14B101Kの不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Cypress CY14B101Kに関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちCypress CY14B101Kデバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
