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AT45D161 Datasheet(PDF) 2 Page - ATMEL Corporation |
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AT45D161 Datasheet(HTML) 2 Page - ATMEL Corporation |
2 / 21 page AT45D161 2 data buffers of 528 bytes each. The buffers allow receiving of data while a page in the main memory is being repro- grammed. Unlike conventional Flash memories that are accessed randomly with multiple address lines and a paral- lel interface, the DataFlash uses a serial interface to sequentially access its data. The simple serial interface facilitates hardware layout, increases system reliability, minimizes switching noise, and reduces package size and active pin count. The device is optimized for use in many commercial and industrial applications where high density, low pin count, low voltage, and low power are essential. Typical applications for the DataFlash are digital voice stor- age, image storage, and data storage. The device operates at clock frequencies up to 15 MHz with a typical active read current consumption of 15 mA. To allow for simple in-system reprogrammability, the AT45D161 does not require high input voltages for pro- gramming. The device operates from a single power supply, 4.5V to 5.5V, for both the program and read opera- tions. The AT45D161 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 cycles are self-timed, and no separate erase cycle is required before programming. Block Diagram Memory Array To provide optimal flexibility, the memory array of the AT45D161 is divided into three levels of granularity com- prising of sectors, blocks, and pages. The Memory Architecture Diagram illustrates the breakdown of each level and details the number of pages per sector and block. All program operations to the DataFlash occur on a page by page basis; however, the optional erase operations can be performed at the block or page level. FLASH MEMORY ARRAY PAGE (528 BYTES) BUFFER 2 (528 BYTES) BUFFER 1 (528 BYTES) I/O INTERFACE SCK CS RESET VCC GND RDY/BUSY WP SO SI |
Similar Part No. - AT45D161_01 |
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Similar Description - AT45D161_01 |
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