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P1AFS600 Datasheet(PDF) 61 Page - Microsemi Corporation |
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P1AFS600 Datasheet(HTML) 61 Page - Microsemi Corporation |
61 / 334 page Fusion Family of Mixed Signal FPGAs R e visio n 2 2 - 45 Flash Memory Block Addressing Figure 2-34 shows a graphical representation of the flash memory block. Each FB is partitioned into sectors, pages, blocks, and bytes. There are 64 sectors in an FB, and each sector contains 32 pages and 1 spare page. Each page contains 8 data blocks and 1 auxiliary block. Each data block contains 16 bytes of user data, and the auxiliary block contains 4 bytes of user data. Addressing for the FB is shown in Table 2-20. When the spare page of a sector is addressed (SPAREPAGE active), ADDR[11:7] are ignored. When the Auxiliary block is addressed (AUXBLOCK active), ADDR[6:2] are ignored. Note: The spare page of sector 0 is unavailable for any user data. Writes to this page will return an error, and reads will return all zeroes. Figure 2-34 • Flash Memory Block Organization Block Organization 140 Block 0 12 3 4 5 6 7 . . . . Se cto r 0 Se cto r 1 Se cto r n 33 Pages Page 0 Page 1 Page 2 Page 3 Page 31 Spare Page 1190 Notes: 1 block = 128 bits 1 page = 8 blocks plus the AUX block 1 sector = 33 pages 1 Flash array = 64 sectors Table 2-20 • FB Address Bit Allocation ADDR[17:0] 17 12 11 76430 Sector Page Block Byte |
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