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E28F004BVT80 Datasheet(PDF) 5 Page - Intel Corporation |
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E28F004BVT80 Datasheet(HTML) 5 Page - Intel Corporation |
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5 / 57 page  E 4-MBIT SmartVoltage BOOT BLOCK FAMILY 5 PRELIMINARY 1.0 PRODUCT FAMILY OVERVIEW This datasheet contains the specifications for the two branches of products in the SmartVoltage 4-Mbit boot block flash memory family: the -BE/CE suffix products feature a low VCC operating range of 2.7V–3.6V; the -BV/CV suffix products offer 3.0V–3.6V operation. Both BE/CE and BV/CV products also operate at 5V for high-speed access times. Throughout this datasheet, the 28F400 refers to all x8/x16 4-Mbit products, while 28F004B refers to all x8 4-Mbit boot block products. Also, the term “2.7V” generally refers to the full voltage range 2.7V–3.6V. Section 1 provides an overview of the flash memory family including applications, pinouts and pin descriptions. Sections 2 and 3 describe the memory organization and operation for these products. Finally, Sections 4 and 5 contain the family’s operating specifications. 1.1 New Features in the SmartVoltage Products The SmartVoltage boot block flash memory family offers identical operation with the BX/BL 12V program products, except for the differences listed below. All other functions are equivalent to current products, including signatures, write commands, and pinouts. • WP# pin has replaced a DU (Don’t Use) pin. Connect the WP# pin to control signal or to VCC or GND (in this case, a logic-level signal can be placed on DU pin). See Tables 2 and 9 to see how the WP# pin works. • 5V program/erase operation has been added. If switching VPP for write protection, switch to GND (not 5V) for complete write protection. To take advantage of 5V write-capability, allow for connecting 5V to VPP and disconnecting 12V from VPP line. • Enhanced circuits optimize low VCC performance, allowing operation down to VCC = 2.7V (using the BE product). If you are using BX/BL 12V VPP boot block products today, you should account for the differences listed above and also allow for connecting 5V to VPP and disconnecting 12V from VPP line, if 5V writes are desired. 1.2 Main Features Intel’s SmartVoltage technology is the most flexible voltage solution in the flash industry, providing two discrete voltage supply pins: VCC for read operation, and VPP for program and erase operation. Discrete supply pins allow system designers to use the optimal voltage levels for their design. The 28F400BV/CV, 28F004BV, 28F400CE and 28F004BE provide program/erase capability at 5V or 12V. The 28F400BV/CV and 28F004BV allow reads with VCC at 3.3 ± 0.3V or 5V, while the 28F400CE and 28F004BE allow reads with VCC at 2.7V–3.6V or 5V. Since many designs read from the flash memory a large percentage of the time, read operation using the 2.7V or 3.3V ranges can provide great power savings. If read performance is an issue, however, 5V VCC provides faster read access times. Table 1. SmartVoltage Provides Total Voltage Flexibility Product Bus VCC VPP Name Width 2.7V–3.6V 3.3 ± 0.3V 5V ± 5% 5V ± 10% 5V ± 10% 12V ± 5% 28F004BV-T/B x8 √√√ √ 28F400BV-T/B x8 or x16 √√√ √ 28F400CV-T/B x8 or x16 √√√ √ 28F004BE-T/B x8 √√ √ √ 28F400CE-T/B x8 or x16 √√ √ √ |
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