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USB5532B 数据表(PDF) 37 Page - Microchip Technology

部件名 USB5532B
功能描述  2-Port SS/HS USB Hub Controller
PDF  68 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB5532B 数据表(HTML) 37 Page - Microchip Technology

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USB5532B
DS00001679C-page 37
 2012 - 2015 Microchip Technology Inc.
5.6.1.1
Configuration Register Write Example
The following example shows how the SMBus messages will be formatted to set the VID of the hub to a custom value,
AA55h.
1.
Write data to the memory of the hub:
2.
Execute the Configuration Register Access command:
5.6.1.2
Configuration Register Read Example
The following example shows how to read the Charger Detection register to find out what type of charger the hub has
connected to:
1.
Write data to the memory of the hub.
TABLE 5-14:
EXAMPLE SMBUS WRITE COMMAND
Byte
Value
Comment
0
5Ah
Address plus write bit.
1
00h
Memory address 0000h.
2
00h
Memory address 0000h.
3
06h
Number of bytes to write to memory.
4
00h
Write Configuration Register.
5
02h
Writing two data bytes.
6
30h
VID is in register 3000h.
7
00h
VID is in register 3000h.
8
55h
LSB of Vendor ID AA55h.
9
AAh
MSB of Vendor ID AA55h.
TABLE 5-15:
CONFIGURATION REGISTER ACCESS COMMAND
Byte
Value
Comment
0
5Ah
Address plus write bit.
1
99h
Command 9937h.
2
37h
Command 9937h.
3
00h
Command Completion.
TABLE 5-16:
EXAMPLE SMBUS WRITE COMMAND
Byte
Value
Comment
0
5Ah
Address plus write bit.
1
00h
Memory address 0000h.
2
00h
Memory address 0000h.
3
04h
Number of bytes to write to memory.
4
01h
Read Configuration Register.
5
01h
Reading one data bytes.
6
30h
BC Detect is in register 30E2h.
7
E2h
BC Detect is in register 30E2h.



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