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USB82640 Datasheet(PDF) 40 Page - Microchip Technology |
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USB82640 Datasheet(HTML) 40 Page - Microchip Technology |
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40 / 64 page  USB82640 DS60001312A-page 40 2010-2015 Microchip Technology Inc. 7.3.3.33 F4h: MS/SD Clock Limit for the Flash Media Controller 7.3.3.34 F5h: Reserved 7.3.3.35 F6h-FBh: Reserved 7.3.3.36 FCh-FFh: Non-Volatile Storage Signature Byte Name Type Bits Description MS_SD_CLK_LIM Upper Nibble Bits 7:4 0 : SD/MMC - 48 MHz 1 : SD/MMC - 24 MHz 2 : SD/MMC - 20 MHz 3 : SD/MMC - 15 MHz Lower Nibble Bits 3:0 0 : MS - 60 MHz -- Default, no limit 1 : MS - 40 MHz 2 : MS - 20 MHz 3 : MS - 15 MHz Bit Name Description 7:0 rsvd Byte Name Description 5:0 rsvd The values for these bytes are set internally and must not be altered. Byte Name Description 3:0 NVSTORE_SIG This signature is used to verify the validity of the data in the first 256 bytes of the configuration area. The signature must be set to ATA2. |
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