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TUSB5052 bảng dữ liệu(PDF) 79 Page - Texas Instruments

tên linh kiện TUSB5052
Giải thích chi tiết về linh kiện  USB TO 2-SERIAL PORT CONTROLLER WITH CONFIGURABLE OPTIONAL HUB
PDF  82 Pages
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nhà sản xuất  TI [Texas Instruments]
Trang chủ  http://www.ti.com
Logo TI - Texas Instruments

TUSB5052 bảng dữ liệu(HTML) 79 Page - Texas Instruments

Back Button TUSB5052 Datasheet HTML 74Page - Texas Instruments TUSB5052 Datasheet HTML 75Page - Texas Instruments TUSB5052 Datasheet HTML 76Page - Texas Instruments TUSB5052 Datasheet HTML 77Page - Texas Instruments TUSB5052 Datasheet HTML 78Page - Texas Instruments TUSB5052 Datasheet HTML 79Page - Texas Instruments TUSB5052 Datasheet HTML 80Page - Texas Instruments TUSB5052 Datasheet HTML 81Page - Texas Instruments TUSB5052 Datasheet HTML 82Page - Texas Instruments  
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13−1
13 Boot Code
Boot code copies predefined USB descriptors to shared RAM. It then checks if EEPROM is present on the I2C port.
If a valid signature is found, boot code reads in the data-type field to determine if the data section is application code
or USB device information. If it is application code, boot code downloads the code to external data space. Once code
is loaded and the checksum is correct, boot code then releases control to the application code. If the data contain
USB device information, boot code reads in the data and, if the checksum is correct, copies it to hub registers and
the embedded function device descriptor. Otherwise, it restores predefined settings to hub registers and the device
descriptor.
Boot code waits for the firmware to be downloaded from the host. Once the firmware is loaded, boot code disconnects
from the USB and releases control to the firmware. For more information, see application notes for this product.



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