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USB82642 датащи(PDF) 38 Page - Microchip Technology

номер детали USB82642
подробное описание детали  Automotive USB 2.0 Hub and Flash Media Card Controller Combo
PDF  64 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB82642 датащи(HTML) 38 Page - Microchip Technology

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USB82642
DS60001253F-page 38
 2012-2021 Microchip Technology Inc.
7.5.3.30
F4h: SD Clock Limit for the Flash Media Controller
7.5.3.31
F5h: Reserved
7.5.3.32
F6h: SD1 Timeout Options
7.5.3.33
F7h-FBh: Reserved
7.5.3.34
FCh-FFh: Non-Volatile Storage Signature
Byte Name
Type
Bits
Description
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
rsvd
Bit
Name
Description
7:0
rsvd
Bit
Name
Description
7:0
MEDIA_SETTINGS
The SD1 and SD2 Timeout Options:
Bit 0 : rsvd
Bit 1 : rsvd
Bits 2-4 : SD1 timeout
Bits 5-7 : rsvd
A value of 001b equates to a timeout of 0.81 seconds, where 010b indicates
an additional 0.81 seconds for a total of 1.62, and so on. The maximum value
is 000b (default), which indicates a total timeout of 6.5 seconds.
Byte
Name
Description
5:0
rsvd
Byte
Name
Description
4:0
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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