CY14B256Q2

CY14B256Q1 CY14B256Q2 CY14B256Q3 256-Kbit (32 K × 8) Serial (SPI) nvSRAM 256-Kbit (32 K × 8) Serial (SPI) nvSRAM 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 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 (except for CY14B256Q1) High reliability ❐ Infinite read, write, and RECALL cycles ❐ 1 million STORE cycles to QuantumTrap ❐ Data retention: 20 years High-speed serial peripheral interface (SPI) ❐ 40-MHz clock rate ❐ Supports SPI mode 0 (0,0) and mode 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 3 V +20%, –10% operation ❐ Average active current of 10 mA at 40-MHz operation Industry standard configurations ❐ Industrial temperature ❐ CY14B256Q1 has identical pin configuration to industry standard 8-pin NV memory ❐ 8-pin dual flat no-lead (DFN) package and 16-pin small outline integrated circuit (SOIC) package ❐ Restriction of hazardous substances (RoHS) compliant Functional Overview The Cypress CY14B256Q1/CY14B256Q2/CY14B256Q3 combines a 256-Kbit nvSRAM[1] with a nonvol...