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| 型號： | ISP1761BE,518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線控制器 |
| 英文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PQFP128 |
| 封裝： | 14 X 20 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT425-1, LQFP-128 |
| 文件頁數(shù)： | 150/164頁 |
| 文件大?。?/td> | 767K |
| 代理商： | ISP1761BE,518 |
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ISP1761_5
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 13 March 2008
85 of 163
NXP Semiconductors
ISP1761
Hi-Speed USB OTG controller
9.
OTG controller
9.1 Introduction
OTG is a supplement to the Hi-Speed USB specication that augments existing USB
peripherals by adding to these peripherals limited host capability to support other targeted
USB peripherals. It is primarily targeted at portable devices because it addresses
concerns related to such devices, such as a small connector and low power. Non-portable
devices, even standard hosts, can also benet from OTG features.
The ISP1761 OTG controller is designed to perform all the tasks specied in the OTG
supplement. It supports Host Negotiation Protocol (HNP) and Session Request Protocol
(SRP) for dual-role devices. The ISP1761 uses software implementation of HNP and SRP
for maximum exibility. A set of OTG registers provides the control and status monitoring
capabilities to support software HNP and SRP.
Besides the normal USB transceiver, timers and analog components required by OTG are
also integrated on-chip. The analog components include:
Built-in 3.3 V-to-5 V charge pump
Voltage comparators
Pull-up or pull-down resistors on data lines
Charging or discharging resistors for VBUS
9.2 Dual-role device
When port 1 of the ISP1761 is congured in OTG mode, it can be used as an OTG
dual-role device. A dual-role device is a USB device that can function either as a host or
as a peripheral.
The default role of the ISP1761 is controlled by the ID pin, which in turn is controlled by
the type of plug connected to the micro-AB receptacle. If ID = LOW (micro-A plug
connected), it becomes an A-device, which is a host by default. If ID = HIGH (micro-B plug
connected), it becomes a B-device, which is a peripheral by default.
Both the A-device and the B-device work on a session base. A session is dened as the
period of time in which devices exchange data. A session starts when VBUS is driven and
ends when VBUS is turned off. Both the A-device and the B-device may start a session.
During a session, the role of the host can be transferred back and forth between the
A-device and the B-device any number of times by using HNP.
If the A-device wants to start a session, it turns on VBUS by enabling the charge pump. The
B-device detects that VBUS has risen above the B_SESS_VLD level and assumes the role
of a peripheral asserting its pull-up resistor on the DP line. The A-device detects the
remote pull-up resistor and assumes the role of a host. Then, the A-device can
communicate with the B-device as long as it wishes. When the A-device nishes
communicating with the B-device, the A-device turns off VBUS and both the devices nally
If the B-device wants to start a session, it must initiate SRP by ‘data line pulsing’ and
‘VBUS pulsing’. When the A-device detects any of these SRP events, it turns on its VBUS.
(Note: only the A-device is allowed to drive VBUS.) The B-device assumes the role of a
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ISP1761BEGE | 功能描述:IC USB CTRL HI-SPEED 128LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應商設備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
| ISP1761BE-S | 功能描述:IC USB CONTROLLER 128LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應商設備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
| ISP1761BE-T | 功能描述:USB 接口集成電路 USB HS OTG CNTROLLER 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1761BEUM | 功能描述:IC USB OTG CONTROLLER HS 128LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應商設備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
| ISP1761ET | 功能描述:USB 接口集成電路 USB 2.0 HS OTG HOST 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
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