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參數資料
| 型號： | ISP1760 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Hi-Speed Universal Serial Bus host controller for embedded applications |
| 中文描述： | 高速嵌入式應用的通用串行總線主控制器 |
| 文件頁數： | 19/105頁 |
| 文件大小： | 449K |
| 代理商： | ISP1760 |
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9397 750 13257
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 01 — 8 November 2004
19 of 105
Philips Semiconductors
ISP1760
Embedded Hi-Speed USB host controller
It is also possible that the system’s DMA will perform a memory-to-memory type of
transfer between the system memory and the ISP1760 memory. The ISP1760 will be
accessed in the PIO mode. Consequently, memory read operations must be preceded by
initializing the Memory register (address 033Ch), as described in
Section 7.3.1
. No IRQ
will be generated by the ISP1760 on completing the DMA transfer but an internal
processor interrupt may be generated to signal that the DMA transfer is completed. This is
mainly useful in implementing the double-buffering scheme for data transfer to optimize
the USB bandwidth.
The ISP1760 DMA programming involves:
Set the active levels of signals DREQ and DACK in the HW Mode Control register.
The DMA Start Address register contains the first memory address at which the data
transfer will start. It must be word-aligned in the 16-bit data bus mode and double
word aligned in the 32-bit data bus mode.
The programming of the DMA Configuration register specifies:
–
The type of transfer that will be performed: read or write
–
The burst size—expressed in bytes—is specified, regardless of the data bus width.
For the same burst size, a double number of cycles will be generated in the 16-bit
mode data bus width as compared to the 32-bit mode.
–
The transfer length—expressed in number of bytes—defines the number of bursts.
The DREQ will be deasserted and asserted to generate the next burst, as long as
there are bytes to be transferred. At the end of a transfer, the DREQ will be
deasserted and an IRQ can be generated if DMAEOTINT (bit 3 in the Interrupt
register) is set. The maximum DMA transfer size is equal to the maximum memory
size. The transfer size can be an odd or even number of bytes, as required. If the
transfer size is an odd number of bytes, the number of bytes transferred by the
system’s DMA is equal to the next multiple of two for the 16-bit data bus width or
four for the 32-bit data bus width. For a write operation, however, only the specified
odd number of bytes in the ISP1760 memory will be affected.
–
Enable ENABLE_DMA (bit 1) of the DMA Configuration register to determine the
assertion of DREQ immediately after setting the bit.
After programming the preceding parameters, the system’s DMA may be enabled (waiting
for the DREQ to start the transfer or immediate transfer may be started).
The programming of the system’s DMA must match the ISP1760 DMA parameters
programmed above. Only one DMA transfer may take place at a time. A PIO mode data
transfer may occur simultaneously with a DMA data transfer, in the same or a different
memory area.
7.4 Interrupts
The ISP1760 will assert an IRQ according to the source or event in the Interrupt register.
The main steps to enable the IRQ assertion are:
1. Set GLOBAL_INTR_EN (bit 0) in the HW Mode Control register.
2. Define the IRQ active as level or edge in INTR_LEVEL (bit 1) of the HW Mode Control
register.
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PDF描述 |
|---|---|
| ISP1761 | Hi-Speed Universal Serial Bus On-The-Go controller |
| ISP1761BE | Hi-Speed Universal Serial Bus On-The-Go controller |
| ISP1761ET | Hi-Speed Universal Serial Bus On-The-Go controller |
| ISP2100A | Telecommunication IC |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ISP1760BE | 制造商:NXP Semiconductors 功能描述:CONTROLLER USB HOST SMD LQFP128 制造商:ST-Ericsson 功能描述:IC CONTROLLER USB HOST 128LQFP |
| ISP1760BE,518 | 功能描述:輸入/輸出控制器接口集成電路 USB HOST CONTROLLER RoHS:否 制造商:Silicon Labs 產品: 輸入/輸出端數量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| ISP1760BE,551 | 功能描述:輸入/輸出控制器接口集成電路 USB HS HOST CONTRLLR RoHS:否 制造商:Silicon Labs 產品: 輸入/輸出端數量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| ISP1760BE,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 |
| ISP1760BE518 | 制造商:ST-Ericsson 功能描述:IC CONTROLLER USB HOST 128LQFP |
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