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AB28F200BX-T90 Datasheet(PDF) 4 Page - Intel Corporation |
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AB28F200BX-T90 Datasheet(HTML) 4 Page - Intel Corporation |
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4 / 33 page  A28F200BX-TB When RP is at ground the WSM is reset the Status Register is cleared and the entire device is protected from being written to This feature pre- vents data corruption and protects the code stored in the device during system reset The system Reset pin can be tied to RP to reset the memory to nor- mal read mode upon activation of the Reset pin With on-chip programerase automation in the 2 Mbit family and the RP functionality for data pro- tection when the CPU is reset and even if a program or erase command is issued the device will not rec- ognize any operation until RP returns to its normal state For the A28F200BX Byte-wide or Word-wide In- putOutput Control is possible by controlling the BYTE pin When the BYTE pin is at a logic low the device is in the byte-wide mode (x8) and data is read and written through DQ 07 During the byte- wide mode DQ 814 are tri-stated and DQ15Ab1 becomes the lowest order address pin When the BYTE pin is at a logic high the device is in the word-wide mode (x16) and data is read and written through DQ 015 12 Applications The 2-Mbit boot block flash family combines high density high performance cost-effective flash mem- ories with blocking and hardware protection capabili- ties Its flexibility and versatility will reduce costs throughout the product life cycle Flash memory is ideal for Just-In-Time production flow reducing sys- tem inventory and costs and eliminating component handling during the production phase During the product life cycle when code updates or feature en- hancements become necessary flash memory will reduce the update costs by allowing either a user- performed code change via floppy disk or a remote code change via a serial link The 2-Mbit boot block flash family provides full function blocked flash memories suitable for a wide range of automotive applications 4 |
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