AT25512 SPI Serial EEPROM 512 Kbits (65,536 x 8) Features Serial Peripheral Interface (SPI) Compatible Supports SPI Modes 0 (0,0) and 3 (1,1): Data sheet describes mode 0 operation Low-Voltage Operation: 1.8V (V = 1.8V to 5.5V) CC Industrial Temperature Range: -40C to +85C 20 MHz Clock Rate (5V) 128Byte Page Mode Block Write Protection: Protect 1/4, 1/2 or entire array Write-Protect (WP) Pin and Write Disable Instructions for Both Hardware and Software Data Protection Self-Timed Write Cycle within 5 ms Maximum ESD Protection > 4,000V High Reliability: Endurance: 1,000,000 write cycles Data retention: 100 years Green (Lead-free/Halide-free/RoHS Compliant) Package Options Die Sale Options: Wafer Form and Bumped Wafers Packages 8-Lead SOIC and 8-Lead TSSOP Datasheet DS20006218B-page 1 2019-2021 Microchip Technology Inc. AT25512 Table of Contents Features......................................................................................................................................................... 1 Packages........................................................................................................................................................1 1. Package Types (not to scale)..................................................................................................................4 2. Pin Description........................................................................................................................................5 2.1. Chip Select (CS)...........................................................................................................................5 2.2. Serial Data Output (SO)............................................................................................................... 5 2.3. Write-Protect (WP)....................................................................................................................... 5 2.4. Ground......................................................................................................................................... 5 2.5. Serial Data Input (SI)....................................................................................................................5 2.6. Serial Data Clock (SCK)...............................................................................................................6 2.7. Device Power Supply (V )......................................................................................................... 6 CC 3. Description.............................................................................................................................................. 7 3.1. SPI Bus Host Connections to Serial EEPROMs.......................................................................... 7 3.2. Block Diagram..............................................................................................................................8 4. Electrical Characteristics.........................................................................................................................9 4.1. Absolute Maximum Ratings..........................................................................................................9 4.2. DC and AC Operating Range.......................................................................................................9 4.3. DC Characteristics....................................................................................................................... 9 4.4. AC Characteristics......................................................................................................................10 4.5. SPI Synchronous Data Timing................................................................................................... 12 4.6. Electrical Specifications..............................................................................................................12 5. Device Operation.................................................................................................................................. 15 5.1. Interfacing the AT25512 on the SPI Bus.................................................................................... 15 5.2. Device Opcodes.........................................................................................................................16 5.3. Hold Function............................................................................................................................. 16 5.4. Write Protection..........................................................................................................................17 6. Device Commands and Addressing......................................................................................................18 6.1. STATUS Register Bit Definition and Function............................................................................ 18 6.2. Read STATUS Register (RDSR)..................................................................................................19 6.3. Write Enable (WREN) and Write Disable (WRDI)......................................................................... 19 6.4. Write STATUS Register (WRSR)..................................................................................................20 7. Read Sequence.................................................................................................................................... 23 8. Write Sequence.....................................................................................................................................24 8.1. Byte Write...................................................................................................................................24 8.2. Page Write..................................................................................................................................24 8.3. Polling Routine........................................................................................................................... 25 9. Packaging Information.......................................................................................................................... 26 9.1. Package Marking Information.....................................................................................................26 DS20006218B-page 2 Datasheet 2019-2021 Microchip Technology Inc.