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USB5532B 数据表(PDF) 32 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) 32 Page - Microchip Technology

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 2012 - 2015 Microchip Technology Inc.
DS00001679C-page 32
USB5532B
5.5.4.1
Special Command 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.
First write data to the memory of the hub
.
2.
After the data is written, execute the Configuration Register Access command
.
3.
Finally, read back data starting at memory offset 04h, which is where the Data byte starts
.
Although the device can send out 128 bytes of memory data, it isn’t necessary to read the entire set, the SMBus Master
can send a stop at any time.
TABLE 5-4:
EXAMPLE SMBUS WRITE COMMAND
Byte
Value
Comment
0
5Ah
Address plus write bit.
1
00h
Memory address 0000h.
2
00h
Memory address 0000h.
3
03h
Number of bytes to write to memory.
4
80h
Get Port Device Status.
5
00h
Reading one data bytes.
6
1Fh
Read all ports.
TABLE 5-5:
CONFIGURATION REGISTER ACCESS COMMAND
Byte
Value
Comment
0
5Ah
Address plus write bit.
1
99h
Command 993Eh.
2
3Eh
Command 993Eh.
3
00h
Command Completion.
TABLE 5-6:
EXAMPLE SMBUS READ COMMAND
Byte
Value
Comments
0
5Ah
Address plus Write bit.
1
00h
Memory Address 0004h.
2
03h
Memory Address 0004h.
0
59h
Address plus Read bit.
1
80h
Device sends 128 bytes of data.
2
03h
Upstream Connection Status. (SS and HS)
3
02h
Port 1 Connection Status. (HS/FS/LS Only)
4
01h
Port 2 Connection Status. (SS Only)



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