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CY14E512I Dataheets PDF



Part Number CY14E512I
Manufacturers Cypress Semiconductor
Logo Cypress Semiconductor
Description 512-Kbit (64 K x 8) Serial (I2C) nvSRAM
Datasheet CY14E512I DatasheetCY14E512I Datasheet (PDF)

512-Kbit (64 K × 8) Serial (I C) nvSRAM with Real Time Clock 512-Kbit (64 K × 8) Serial (I2C) nvSRAM with Real Time Clock CY14C512I CY14B512I, CY14E512I 2 Features ■ ■ 512-Kbit nonvolatile static random access memory (nvSRAM) ❐ Internally organized as 64 K × 8 ❐ STORE to QuantumTrap nonvolatile elements initiated automatically on power-down (AutoStore) or by using I2C command (Software STORE) or HSB pin (Hardware STORE) ❐ RECALL to SRAM initiated on power-up (Power-Up RECALL) or by I2C comma.

  CY14E512I   CY14E512I


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512-Kbit (64 K × 8) Serial (I C) nvSRAM with Real Time Clock 512-Kbit (64 K × 8) Serial (I2C) nvSRAM with Real Time Clock CY14C512I CY14B512I, CY14E512I 2 Features ■ ■ 512-Kbit nonvolatile static random access memory (nvSRAM) ❐ Internally organized as 64 K × 8 ❐ STORE to QuantumTrap nonvolatile elements initiated automatically on power-down (AutoStore) or by using I2C command (Software STORE) or HSB pin (Hardware STORE) ❐ RECALL to SRAM initiated on power-up (Power-Up RECALL) or by I2C command (Software RECALL) ❐ Automatic STORE on power-down with a small capacitor ■ High reliability ❐ Infinite read, write, and RECALL cycles ❐ 1 million STORE cycles to QuantumTrap ❐ Data retention: 20 years at 85 C ■ Real Time Clock (RTC) ❐ Full-featured RTC ❐ Watchdog timer ❐ Clock alarm with programmable interrupts ❐ Backup power fail indication ❐ Square wave output with programmable frequency (1 Hz, 512 Hz, 4096 Hz, 32.768 kHz) ❐ Capacitor or battery backup for RTC ❐ Backup current of 0.45 µA (typical) 2 ■ High-speed I C interface ❐ Industry standard 100 kHz and 400 kHz speed ❐ Fast mode Plus 1 MHz speed ❐ High speed 3.4 MHz ❐ Zero cycle delay reads and writes ■ Write protection ❐ Hardware protection using Write Protect (WP) pin ❐ Software block protection for one-quarter, one-half, or entire array I2C access to special functions ❐ Nonvolatile STORE/RECALL ❐ 8-byte serial number ❐ Manufacturer ID and Product ID ❐ Sleep mode Low power consumption ❐ Average active current of 1 mA at 3.4 MHz operation ❐ Average standby mode current of 250 µA ❐ Sleep mode current of 8 µA Industry standard configurations ❐ Operating voltages: • CY14C512I : VCC = 2.4 V to 2.6 V • CY14B512I : VCC = 2.7 V to 3.6 V • CY14E512I : VCC = 4.5 V to 5.5 V ❐ Industrial temperature ❐ 16-pin small outline integrated circuit (SOIC) package ❐ Restriction of hazardous substances (RoHS) compliant ■ ■ Overview The Cypress CY14C512I/CY14B512I/CY14E512I combines a 512-Kbit nvSRAM[1] with a full-featured RTC in a monolithic integrated circuit with serial I2C interface. The memory is organized as 64 K words of 8 bits each. The embedded nonvolatile elements incorporate the QuantumTrap technology, creating the world’s most reliable nonvolatile memory. The SRAM provides infinite read and write cycles, while the QuantumTrap cells provide highly reliable nonvolatile storage of data. Data transfers from SRAM to the nonvolatile elements (STORE operation) takes place automatically at power-down. On power-up, data is restored to the SRAM from the nonvolatile memory (RECALL operation). The STORE and RECALL operations can also be initiated by the user through I2C commands. Logic Block Diagram VCC VCAP VRTCcap VRTCbat Serial Number 8x8 Manufacture ID/ Product ID Memory Control Register Command Register Sleep Quantrum Trap 64 K x 8 SRAM 64 K x 8 STORE RECALL Power Control Block SDA SCL A2, A1, A0 WP I C Control Logic Slave Address Decoder 2 Control Registers Slave Memory Slave RTC Slave Memory Address and Data Control X in INT/SQW Xout RTC Control Logic Registers Counters Note 1. Serial (I2C) nvSRAM will be referred to as nvSRAM throughout the datasheet. www.DataSheet4U.net Cypress Semiconductor Corporation Document #: 001-64879 Rev. *B • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Revised May 4, 2011 [+] Feedback CY14C512I CY14B512I, CY14E512I Contents Pinout ................................................................................ 3 Pin Definitions .................................................................. 3 I2C Interface ...................................................................... 4 Protocol Overview ............................................................ 4 I2C Protocol – Data Transfer ....................................... 4 Data Validity ...................................................................... 5 START Condition (S) ........................................................ 5 STOP Condition (P) .......................................................... 5 Repeated START (Sr) ....................................................... 5 Byte Format ....................................................................... 5 Acknowledge / No-acknowledge ..................................... 5 High-Speed Mode (Hs-mode) .......................................... 6 Serial Data Format in Hs-mode ................................... 6 Slave Device Address ...................................................... 7 Memory Slave Device ................................................. 7 RTC Registers Slave Device ....................................... 7 Control Registers Slave Device ................................... 7 Memory Control Register ............................................ 8 Command Register ..................................................... 8 Write Protection (WP) ....................................................... 9 AutoStore Operation ................................................


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