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USB2502 数据表(PDF) 21 Page - Microchip Technology

部件名 USB2502
功能描述  2-Port USB 2.0 Hub Controller
PDF  40 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB2502 数据表(HTML) 21 Page - Microchip Technology

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 2007 - 2016 Microchip Technology Inc.
DS000002248A-page 21
USB2502
5.3.9.1
Register 00h: Status/Command (Reset = 0x00)
5.3.9.2
Register 01h: Vendor ID (LSB) (Reset = 0x00)
5.3.9.3
Register 02h: Vendor ID (MSB) (Reset = 0x00)
5.3.9.4
Register 03h: Product ID (LSB) (Reset = 0x00)
5.3.9.5
Register 04h: Product ID (MSB) (Reset = 0x00)
5.3.9.6
Register 05h: Device ID (LSB) (Reset = 0x00)
Bit Number
Bit Name
Description
7:3
Reserved
Reserved. {Note: Software must never write a ‘1’ to these bits}
2
RESET
Reset the SMBus Interface and internal memory back to RESET_N assertion
default settings. {Note: During this reset, this bit is automatically cleared to its
default value of 0.}
0 = Normal Run/Idle State.
1 = Force a reset.
1
WRITE_PROT
Write Protect: The external SMBus host sets this bit after the Hub’s internal
memory is loaded with configuration data. {Note: The External SMBus Host is
responsible for verification of downloaded data.}
0 = The internal memory (address range 01-10h) is not write protected.
1 = The internal memory (address range 01-10h) is “write-protected” to
prevent unintentional data corruption.}
Note:
{This bit is write once and is only cleared by assertion of the external
RESET_N pin.}
0
USB_ATTACH
USB Attach & power-down the SMBus Interface.
0 = Default; SMBus slave interface is active.
1 = Hub will signal a USB attach event to an upstream device, Note: SMBus
Slave interface will completely power down after the ACK has completed.
Note:
{This bit is write once and is only cleared by assertion of the external
RESET_N pin.}
Bit Number
Bit Name
Description
7:0
VID_LSB
Least Significant Byte of the Vendor ID.
Bit Number
Bit Name
Description
7:0
VID_MSB
Most Significant Byte of the Vendor ID.
Bit Number
Bit Name
Description
7:0
PID_LSB
Least Significant Byte of the Product ID.
Bit Number
Bit Name
Description
7:0
PID_MSB
Most Significant Byte of the Product ID.
Bit Number
Bit Name
Description
7:0
DID_LSB
Least Significant Byte of the Device ID.



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