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AT25320B Datasheet(PDF) 1 Page - ATMEL Corporation |
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AT25320B Datasheet(HTML) 1 Page - ATMEL Corporation |
1 / 26 page ![]() Features • Serial Peripheral Interface (SPI) Compatible • Supports SPI Modes 0 (0,0) and 3 (1,1) – Datasheet Describes Mode 0 Operation • Low-voltage and Standard-voltage Operation – 1.8 (V CC = 1.8V to 5.5V) • 20MHz Clock Rate (5V) • 32-byte 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 (5ms max) • High Reliability – Endurance: One Million Write Cycles – Data Retention: 100 Years • Green (Pb/Halide-free/RoHS Compliant) Packaging Options • Die Sales: Wafer Form, Tape and Reel, and Bumped Wafers Description The Atmel® AT25320B/640B provides 32768-/65536-bits of serial electrically-erasable programmable read-only memory (EEPROM) organized as 4096/8192 words of 8-bits each. The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operation are essential. The AT25320B/640B is available in space-saving 8-lead JEDEC SOIC, 8-lead UDFN, 8-lead XDFN, 8-lead TSSOP, and 8-ball VFBGA packages. The AT25320B/640B is enabled through the Chip Select pin (CS) and accessed via a three-wire interface consisting of Serial Data Input (SI), Serial Data Output (SO), and Serial Clock (SCK). All programming cycles are completely self-timed, and no sepa- rate erase cycle is required before write. Table 0-1. Pin Configuration Pin Name Function CS Chip Select SCK Serial Data Clock SI Serial Data Input SO Serial Data Output GND Ground VCC Power Supply WP Write Protect HOLD Suspends Serial Input VCC HOLD SCK SI CS SO WP GND 4 3 2 1 5 6 7 8 8-lead UDFN Bottom View CS SO WP GND 1 2 3 4 8 7 6 5 8-lead SOIC VCC HOLD SCK SI 8-lead TSSOP 1 2 3 4 8 7 6 5 CS SO WP GND VCC HOLD SCK SI VCC HOLD SCK SI CS SO WP GND 1 2 3 4 8 7 6 5 8-ball VFBGA Bottom View VCC HOLD SCK SI CS SO WP GND 4 3 2 1 5 6 7 8 8-lead XDFN Bottom View SPI Serial EEPROMs 32K (4096 x 8) 64K (8192 x 8) Atmel AT25320B AT25640B 8535F–SEEPR–6/10 |
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