參數(shù)資料
型號(hào)： SH2165-FGT
元件分類： 微控制器/微處理器
英文描述： SPECIALTY MICROPROCESSOR CIRCUIT, PQFP64
封裝： 10 X 10 MM, 0.50 MM PITCH, ROHS COMPLIANT, LQFP-64
文件頁(yè)數(shù)： 28/33頁(yè)
文件大?。?/td> 354K
代理商： SH2165-FGT
SH2165
USB POWER MANAGEMENT
Copyright 1999-2005 Semtech Corporation
SH2165 data sheet v1.08 (2005-05-17)
www.semtech.com
4
The SH2165 supports the USB suspend command and remote wake-up
feature. In suspend state, the SH2165 still runs normally, consuming about
5 mA, because the PixiPoint sampling circuit must run continuously. This
does not comply with the USB specification, which requires power
consumption under 500 A when suspended. But the host system can still
put the USB hub and other related circuits into low power consumption
mode. When the SH2165 gets any keyboard report or PixiPoint report, it
wakes up the host.
Windows XP supports “selective suspend”, which works very well with
SH2165. But Windows XP does not normally turn on “selective suspend”
for a composite device like the SH2165. Semtech provides a driver
initialization file (smtchid.inf) to enable “selective suspend” for the SH2165
under Windows XP. To enable “selective suspend” for the SH2165 under
Windows XP, take the following steps:
1. Connect the SH2165 to the host system.
2. Go to Windows Control Panel > System > Hardware Manager
3. Under Human Interface Devices, you see two USB Human Interface
Devices, one for the SH2165 keyboard and one for the SH2165 mouse
(force stick). Follow step 4 for each item.
4. Right-click the item, choose update the driver manually and choose
“have disk.” Then select the smychid.inf file.
Note: Semtech does not and need not provide drivers. Semtech provides
this driver initialization file so that the selective suspend feature is
supported for the SH2165, using the existing Microsoft mouse and
keyboard drivers.
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