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USB5534B 数据表(PDF) 32 Page - Microchip Technology

部件名 USB5534B
功能描述  4-Port SS/HS USB Hub Controller
PDF  73 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB5534B 数据表(HTML) 32 Page - Microchip Technology

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USB5534B
DS00001681C-page 32
 2012 - 2015 Microchip Technology Inc.
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)
5
02h
Port 3 Connection Status.(HS/FS/LS Only)
6
02h
Port 4 Connection Status.(HS/FS/LS Only)



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