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| 型號(hào)： | ISP1761BE,551 |
| 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(yè)數(shù)： | 122/164頁(yè) |
| 文件大?。?/td> | 767K |
| 代理商： | ISP1761BE,551 |
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ISP1761_5
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 13 March 2008
59 of 163
NXP Semiconductors
ISP1761
Hi-Speed USB OTG controller
The PTD structures of the ISP1761 are translations of EHCI data structures that are
optimized for the ISP1761. It, however, still follows the basic EHCI architecture. This
optimized form of EHCI data structures is necessary because the ISP1761 is a slave host
controller and has no bus master capability.
EHCI manages schedules in two lists: periodic and asynchronous. Data structures are
designed to provide the maximum exibility required by USB, minimize memory trafc,
and reduce hardware and software complexity. The ISP1761 controller executes
transactions for devices by using a simple shared-memory schedule. This schedule
consists of data structures organized into three lists.
qISO — Isochronous transfer
qINTL — Interrupt transfer
qATL — Asynchronous transfer; for the control and bulk transfers
The system software maintains two lists for the host controller: periodic and
asynchronous.
The ISP1761 has a maximum of 32 ISO, 32 INTL and 32 ATL PTDs. These PTDs are
used as channels to transfer data from the shared memory to the USB bus. These
channels are allocated and de-allocated on receiving the transfer from the core USB
driver.
Multiple transfers are scheduled to the shared memory for various endpoints by traversing
the next link pointer provided by endpoint data structures, until it reaches the end of the
endpoint list. There are three endpoint lists: one for ISO endpoints, and the other for INTL
and ATL endpoints. If the schedule is enabled, the host controller executes the ISO
schedule, followed by the INTL schedule, and then the ATL schedule.
These lists are traversed and scheduled by the software according to the EHCI traversal
rule. The host controller executes scheduled ISO, INTL and ATL PTDs. The completion of
a transfer is indicated to the software by the interrupt that can be grouped under various
PTDs by using the AND or OR registers that are available for each schedule type: ISO,
INTL and ATL. These registers are simple logic registers to decide the completion status
of group and individual PTDs. When the logical conditions of the Done bit is true in the
shared memory, it means that PTD has completed.
There are four types of interrupts in the ISP1761: ISO, INTL, ATL and SOF. The latency
can be programmed in multiples of
SOF (125 s).
The NextPTD pointer is a feature that allows the ISP1761 to jump unused and skip PTDs.
This will improve the PTD transversal latency time. The NextPTD pointer is not meant for
same or single endpoint. The NextPTD works only in forward direction.
The NextPTD traversal rules dened by the ISP1761 hardware are:
1. Start the PTD memory vertical traversal, considering the skip and LastPTD
information, as follows.
2. If the current PTD is active and not done, perform the transaction.
3. Follow the NextPTD pointer as specied in bits 4 to 0 of DW4.
4. If combined with LastPTD, the LastPTD setting must be at a higher address than the
NextPTD specied. So both are set in a logical manner.
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| 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(biāo)準(zhǔn)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(yīng)商設(shè)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(biāo)準(zhǔn)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(yīng)商設(shè)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(fēng)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(biāo)準(zhǔn)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(yīng)商設(shè)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(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
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