Features Single 2.5V or 2.7V to 3.6V Supply RapidS Serial Interface: 66MHz Maximum Clock Frequency SPI Compatible Modes 0 and 3 User Configurable Page Size 256-Bytes per Page 264-Bytes per Page Page Size Can Be Factory Pre-configured for 256-Bytes Page Program Operation Intelligent Programming Operation 8-megabit 4,096 Pages (256/264-Bytes/Page) Main Memory 2.5V or 2.7V Flexible Erase Options Page Erase (256-Bytes) DataFlash Block Erase (2-Kbytes) Sector Erase (64-Kbytes) Chip Erase (8Mbits) AT45DB081D Two SRAM Data Buffers (256-/264-Bytes) Allows Receiving of Data while Reprogramming the Flash Array Continuous Read Capability through Entire Array Ideal for Code Shadowing Applications Low-power Dissipation 7mA Active Read Current Typical 25 A Standby Current Typical 15 A Deep Power Down Typical Hardware and Software Data Protection Features Individual Sector Sector Lockdown for Secure Code and Data Storage Individual Sector Security: 128-byte Security Register 64-byte User Programmable Space Unique 64-byte Device Identifier JEDEC Standard Manufacturer and Device ID Read 100,000 Program/Erase Cycles Per Page Minimum Data Retention 20 Years Industrial Temperature Range Green (Pb/Halide-free/RoHS Compliant) Packaging Options 1. Description The Adesto AT45DB081D is a 2.5V or 2.7V, serial-interface Flash memory ideally suited for a wide variety of digital voice-, image-, program code- and data-stor- age applications. The AT45DB081D supports RapidS serial interface for applications requiring very high speed operations. RapidS serial interface is SPI com- patible for frequencies up to 66MHz. Its 8,650,752-bits of memory are organized as 4,096 pages of 256-bytes or 264-bytes each. In addition to the main memory, the AT45DB081D also contains two SRAM buffers of 256-/264-bytes each. The buffers allow the receiving of data while a page in the main Memory is being reprogrammed, as well as writing a continuous data stream. EEPROM emulation (bit or byte alterabil- ity) is easily handled with a self-contained three step read-modify-write operation. Unlike conventional Flash memories that are accessed randomly with multiple 3596ODFLASH1/2013 address lines and a parallel interface, the Adesto DataFlash uses a RapidS serial interface to sequentially access its data. The simple sequential access dramatically reduces active pin count, facilitates hardware layout, increases system reliability, minimizes switching noise, and reduces package size. The device is optimized for use in many commercial and industrial appli- cations where high-density, low-pin count, low-voltage and low-power are essential. To allow for simple in-system reprogrammability, the AT45DB081D does not require high input voltages for programming. The device operates from a single power supply, 2.5V to 3.6V or 2.7V to 3.6V, for both the program and read operations. The AT45DB081D is enabled through the chip select pin (CS) and accessed via a three-wire interface consisting of the Serial Input (SI), Serial Output (SO), and the Serial Clock (SCK). All programming and erase cycles are self-timed. 2. Pin Configurations and Pinouts Figure 2-1. MLF (VDFN) Top View SI 1 8 SO SCK 2 7 GND RESET 3 6 VCC CS 4 5 WP Figure 2-2. SOIC Top View SI 1 8 SO SCK 2 7 GND RESET 3 6 VCC CS 4 5 WP Note: 1. The metal pad on the bottom of the MLF package is floating. This pad can be a No Connect or connected to GND 2 AT45DB081D 3596ODFLASH1/2013