CY14E256I

256-Kbit (32 K × 8) Serial (I C) nvSRAM with Real Time Clock 256-Kbit (32 K × 8) Serial (I2C) nvSRAM with Real Time Clock CY14C256I CY14B256I, CY14E256I 2 Features 256-Kbit nonvolatile static random access memory (nvSRAM) ❐ Internally organized as 32 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 m...