參數(shù)資料
型號： ISP1183BS,157
廠商： ST-ERICSSON
元件分類： 總線控制器
英文描述： UNIVERSAL SERIAL BUS CONTROLLER, PQCC32
封裝： 5 X 5 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT-617-1, HVQFN-32
文件頁數(shù)： 8/65頁
文件大?。?/td> 306K
代理商： ISP1183BS,157
ISP1183_2
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 7 June 2007
16 of 65
NXP Semiconductors
ISP1183
Low-power USB Peripheral Controller with DMA
10. DMA transfer
Direct Memory Access (DMA) is a method to transfer data from one location to another in
a computer system, without intervention of the CPU. Many implementations of DMA exist.
The ISP1183 supports two methods:
8237 compatible mode: based on the DMA subsystem of the IBM personal
computers (PC, AT and all its successors and clones); this architecture uses the Intel
8237 DMA controller and has separate address spaces for memory and I/O
DACK-only mode: based on the DMA implementation in some embedded RISC
processors, which has a single address space for both memory and I/O
The ISP1183 supports DMA transfer for all 14 congurable endpoints (see Table 4). Only
one endpoint can be selected at a time for DMA transfer. The DMA operation of the
ISP1183 can be interleaved with normal I/O mode access to other endpoints.
The following features are supported:
Single-cycle or burst transfers (up to 16 bytes per cycle)
Programmable transfer direction (read or write)
Programmable signal levels on pins DREQ and DACK
10.1 Selecting an endpoint for DMA transfer
The target endpoint for DMA access is selected through bits EPDIX[3:0] in the DMA
Conguration register, see Table 7. The transfer direction (read or write) is automatically
set by bit EPDIR in the associated ECR, to match the selected endpoint type (OUT
endpoint: read; IN endpoint: write).
Asserting input DACK automatically selects the endpoint specied in the DMA
Conguration register, regardless of the current endpoint used for the I/O mode access.
Table 7.
Endpoint selection for the DMA transfer
Endpoint identier
EPDIX[3:0]
Transfer direction
EPDIR = 0
EPDIR = 1
1
0010
OUT: read
IN: write
2
0011
OUT: read
IN: write
3
0100
OUT: read
IN: write
4
0101
OUT: read
IN: write
5
0110
OUT: read
IN: write
6
0111
OUT: read
IN: write
7
1000
OUT: read
IN: write
8
1001
OUT: read
IN: write
9
1010
OUT: read
IN: write
10
1011
OUT: read
IN: write
11
1100
OUT: read
IN: write
12
1101
OUT: read
IN: write
13
1110
OUT: read
IN: write
14
1111
OUT: read
IN: write
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相關代理商/技術(shù)參數(shù)
參數(shù)描述
ISP1183BSFA 功能描述:IC USB HOST CTRL LOW-SPD 32HVQFN RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標準包裝:3,000 系列:- 應用:PDA，便攜式音頻/視頻，智能電話 接口:I²C，2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應商設備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2
ISP1183BS-S 功能描述:USB 接口集成電路 FULL-SPD USB2 DEVICE 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
ISP1183BS-T 功能描述:USB 接口集成電路 FULL-SPD USB2 DEVICE 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
ISP1183BSTM 功能描述:IC USB INTERFACE W/DMA 32-HVQFN RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標準包裝:3,000 系列:- 應用:PDA，便攜式音頻/視頻，智能電話 接口:I²C，2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應商設備封裝:24-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2
ISP1183PC 制造商:ST-Ericsson 功能描述:Low Power Universal Serial Bus Peripheral Controller w/ DMA
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