參數(shù)資料
型號: ISP1161ABD
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: Full-speed Universal Serial Bus single-chip host and device controller
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封裝: 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64
文件頁數(shù): 82/134頁
文件大小: 587K
代理商: ISP1161ABD
Philips Semiconductors
ISP1161A
Full-speed USB single-chip host and device controller
Product data
Rev. 03 — 23 December 2004
82 of 134
9397 750 13962
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
11.4 Suspend and resume
11.4.1
Suspend conditions
The ISP1161A DC detects a USB suspend status when a constant idle state is
present on the USB bus for more than 3 ms.
The bus-powered devices that are suspended must not consume more than 500
μ
A
of current. This is achieved by shutting down power to system components or
supplying them with a reduced voltage.
The steps leading up to suspend status are as follows:
1. On detecting a wakeup-to-suspend transition, the ISP1161A DC sets
bit SUSPND in the DcInterrupt register. This will generate an interrupt if
bit IESUSP in the DcInterruptEnable register is set.
2. When the firmware detects a suspend condition, it must prepare all system
components for the suspend state:
a. All signals connected to the ISP1161A DC must enter appropriate states to
meet the power consumption requirements of the suspend state.
b. All input pins of the ISP1161A DC must have a CMOS LOW or HIGH level.
3. In the interrupt service routine, the firmware must check the current status of the
USB bus. When bit BUSTATUS in the DcInterrupt register is logic 0, the USB bus
has left the suspend mode and the process must be aborted. Otherwise, the next
step can be executed.
4. To meet the suspend current requirements for a bus-powered device, the internal
clocks must be switched off by clearing bit CLKRUN in the
DcHardwareConfiguration register.
5. When the firmware has set and cleared bit GOSUSP in the DcMode register, the
ISP1161A enters the suspend state. In powered-off application, the ISP1161A
DC asserts output SUSPEND and switches off the internal clocks after 2 ms.
Figure 38
shows a typical timing diagram.
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ISP1161ABD,151 功能描述:USB 接口集成電路 DO NOT USE ORDER ISP1161A1BD RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1161ABD,157 功能描述:USB 接口集成電路 DO NOT USE ORDER ISP1161A1BD RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
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