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參數資料
| 型號： | ISP1181 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Full-speed Universal Serial Bus Interface Device(全速通用串行總線接口器件) |
| 中文描述： | 全速通用串行總線接口設備（全速通用串行總線接口器件） |
| 文件頁數： | 20/69頁 |
| 文件大小： | 1655K |
| 代理商： | ISP1181 |
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Philips Semiconductors
ISP1181
Full-speed USB interface
Objective specification
Rev. 01 — 13 March 2000
20 of 69
9397 750 06896
Philips Electronics N.V. 2000. All rights reserved.
The USB connections D
+
and D
remain powered and logically connected to the
USB bus. If a crystal oscillator is used, powering down during ‘suspend’ is managed
by the internal logic of ISP1181. When using an external oscillator on pin XTAL1, a
stable logic 1 level must be applied during ‘suspend’ state.
Figure 7
shows a typical bus-powered modem application using ISP1181 in
powered-on mode. The SUSPEND output is connected to the reset input (RST) of the
8031 microcontroller via an external inverter. This allows a ‘resume’ condition to wake
up the 8031 from power-down mode. The ISP1181 is woken up via the USB bus
(global resume) or by the ring detection circuit on the telephone line.
11.1.2
Powered-off application
In powered-off application (PWROFF = 1 in the Hardware Configuration Register) the
supply of the CPU and other parts of the circuit is removed during ‘suspend’ state.
The SUSPEND output is active HIGH during ‘suspend’ state, making it suitable as a
power switch control signal, e.g. for an external oscillator.
Input pins of ISP1181 are pulled to ground via the pin buffers. Outputs are made
three-state to prevent current flowing in the application. Bi-directional pins are made
three-state and must be pulled to ground externally by the application. The power
supply of external pull-ups must also be removed to reduce power consumption.
Fig 7.
SUSPEND and WAKEUP signals in a powered-on modem application.
idth
WAKEUP
8031
RST
RING DETECTION
ISP1181
D
+
D
USB
VBUS
VCC(5.0)
VCC
LINE
MGS781
SUSPEND
Fig 8.
Suspend and resume timing for powered-off application.
handbook, full pagewidth
MGS782
WAKEUP
2 ms
0.5 ms
SUSPEND
相關PDF資料 |
PDF描述 |
|---|---|
| ISP1181DGG | INDUCTOR 4.7NH +-.3NH 0402 SMD |
| ISP1183 | Low-power Universal Serial Bus interface device with DMA |
| ISP1183BS | Low-power Universal Serial Bus interface device with DMA |
| ISP1301 | Universal Serial Bus On-The-Go transceiver |
| ISP1301BS | Universal Serial Bus On-The-Go transceiver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ISP1181A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full-speed Universal Serial Bus peripheral controller |
| ISP1181ABS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full-speed Universal Serial Bus peripheral controller |
| ISP1181ABS,518 | 功能描述:USB 接口集成電路 USB 1.1 ADV DEVICE RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1181ABS,551 | 功能描述:USB 接口集成電路 USB 1.1 ADVANCED DEVICE RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1181ABS,557 | 功能描述:USB 接口集成電路 DO NOT USE ORDER -S OR -T PART RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
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