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| 型號(hào)： | ISP1761BE,518 |
| 廠商： | ST-ERICSSON |
| 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)： | 3/164頁(yè) |
| 文件大小： | 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
99 of 163
NXP Semiconductors
ISP1761
Hi-Speed USB OTG controller
10. Peripheral controller
10.1 Introduction
The design of the peripheral controller in the ISP1761 is compatible with the NXP
ISP1582 Hi-Speed Universal Serial Bus peripheral controller IC. The functionality of the
peripheral controller in the ISP1761 is similar to the ISP1582 in 16-bit bus mode. In
addition, the register sets are also similar, with only a few variations.
The USB protocol and data transfer operations of the peripheral controller are executed
using external rmware. The external microcontroller or microprocessor can access the
peripheral controller-specic registers through the local bus interface. The transfer of data
between a microprocessor and the peripheral controller can be done in PIO mode or
programmed DMA mode.
For details on general functional description of the peripheral controller, refer to the
ISP1582 data sheet. For details on the software programming, refer to Ref. 6 “ISP1582/83
10.1.1 Direct Memory Access (DMA)
The DMA controller of the ISP1761 is used to transfer data between the system memory
and endpoints buffers. It is a slave DMA controller that requires an external DMA master
to control the transfer.
10.1.1.1
DMA for the IN endpoint
When the internal DMA is enabled and at least one buffer is free, the DC_DREQ line is
asserted. The external DMA controller then starts negotiating for control of the bus. As
soon as it has access, it asserts the DC_DACK line and starts writing data. The burst
length is programmable. When the number of bytes equal to the burst length has been
written, the DC_DREQ line is de-asserted. As a result, the DMA controller de-asserts the
DC_DACK line and releases the bus. At that moment, the whole cycle restarts for the next
burst. When the buffer is full, the DC_DREQ line is de-asserted and the buffer is validated,
which means that it is sent to the host at the next IN token. When the DMA transfer is
terminated, the buffer is also validated, even if it is not full.
10.1.1.2
DMA for the OUT endpoint
When the internal DMA is enabled and at least one buffer is full, the DC_DREQ line is
asserted. The external DMA controller then starts negotiating for control of the bus. As
soon as it has access, it asserts the DC_DACK line and starts reading data. The burst
length is programmable. When the number of bytes equal to the burst length has been
read, the DC_DREQ line is de-asserted. As a result, the DMA controller de-asserts the
DC_DACK line and releases the bus. At that moment, the whole cycle restarts for the next
burst. When all the data is read, the DC_DREQ line is de-asserted and the buffer is
cleared. This means that it can be overwritten when a new packet arrives.
10.1.1.3
DMA initialization
To reduce the power consumption, a controllable clock that drives DMA controller circuits
is turned off, by default. If the DMA functionality is required by an application, DMACLKON
(bit 9) of the Mode register (address: 020Ch) must be enabled during initialization of the
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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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