參數(shù)資料
型號: ISP1161A1BM
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: Universal Serial Bus single-chip host and device controller
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封裝: 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-414-1, LQFP-64
文件頁數(shù): 22/127頁
文件大?。?/td> 2762K
代理商: ISP1161A1BM
Philips Semiconductors
ISP1161
Full-speed USB single-chip host and device controller
Product data
Rev. 01 — 3 July 2001
22 of 130
9397 750 08313
Philips Electronics N.V. 2001. All rights reserved.
9.
The USB host controller (HC)
9.1 The HC’s four USB states
ISP1161’s USB HC has four USB states
USB Operational, USB Reset, USB
Suspend, and USB Resume
that define the HC’s USB signaling and bus states
responsibilities. The signals are visible to the HC (software) Driver via ISP1161 USB
HC’s control registers.
The USB states are reflected in the HostControllerFunctionalState field of the
HcControl register (01H - Read, 81H - Write), which is located at bits 7 and 6 of the
register.
The HC Driver can perform only the USB state transitions shown in
Figure 23
.
Remark:
The Software Reset in
Figure 23
is not caused by the HcSoftwareReset
command. It is caused by the HostControllerReset field of the HcCommandStatus
register (02H - Read, 82H - Write).
9.2 Generating USB traffic
USB traffic can be generated only when the ISP1161 USB HC is under the USB
Operational State. Therefore, the HC Driver must set the
HostControllerFunctionalState field of the HcControl register before generating USB
traffic.
Fig 23. ISP1161 HC’s USB states.
MGT947
USB_OPERATIONAL
USB_SUSPEND
USB_RESUME
USB_RESUME write
or
remote wake-up
USB_RESET
USB_OPERATIONAL write
USB_OPERATIONAL write
USB_SUSPEND write
USB_RESET write
USB_RESET write
USB_RESET write
hardware reset
software reset
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