Overview
The Cypress CY14B101P combines a 1 Mbit nonvolatile static RAM with full featured real time clock in a monolithic integrated circuit with serial SPI interface. The memory is organized as 128K 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.

Features
■ 1 Mbit Nonvolatile SRAM
    ❐ Internally organized as 128K x 8
    ❐ STORE to QuantumTrap nonvolatile elements initiated automatically on power down (AutoStore) or by user using HSB pin (Hardware Store) or SPI instruction (Software Store)
    ❐ RECALL to SRAM initiated on power up (Power Up Recall) or by SPI Instruction (Software Recall)
    ❐ Automatic STORE on power down with a small capacitor
■ High Reliability
    ❐ Infinite Read, Write, and RECALL cycles
    ❐ 200,000 STORE cycles to QuantumTrap
    ❐ Data Retention: 20 Years
■ Real Time Clock
    ❐ Full featured Real Time Clock
    ❐ Watchdog timer
    ❐ Clock alarm with programmable interrupts
    ❐ Capacitor or battery backup for RTC
    ❐ Backup current of 300 nA
■ High Speed Serial Peripheral Interface (SPI)
    ❐ 40 MHz Clock rate - SRAM Memory access
    ❐ 25 MHz Clock rate - RTC Memory access
    ❐ Supports SPI Modes 0 (0,0) and 3 (1,1)
■ Write Protection
    ❐ Hardware Protection using Write Protect (WP) Pin
    ❐ Software Protection using Write Disable Instruction
    ❐ Software Block Protection for 1/4, 1/2, or entire Array
■ Low Power Consumption
    ❐ Single 3V +20%, –10% operation
    ❐ Average VCC current of 10 mA at 40 MHz operation
■ Industry Standard Configurations
    ❐ Commercial and industrial temperatures
    ❐ 16-pin SOIC Package
    ❐ RoHS compliant