- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄360999 > ISP1362 (NXP Semiconductors N.V.) Single-chip Universal Serial Bus On-The-Go controller PDF資料下載
參數(shù)資料
| 型號： | ISP1362 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Single-chip Universal Serial Bus On-The-Go controller |
| 中文描述： | 單芯片通用串行總線和On - The - Go控制器 |
| 文件頁數(shù)： | 56/150頁 |
| 文件大?。?/td> | 647K |
| 代理商： | ISP1362 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁當(dāng)前第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁
Philips Semiconductors
ISP1362
Single-chip USB OTG controller
Product data
Rev. 03
—
06 January 2004
56 of 150
9397 750 12337
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
The DMA subsystem of an IBM-compatible PC is based on the Intel 8237 DMA
controller. It operates as a
‘fl
y-by
’
DMA controller. Data is not stored in the DMA
controller, but it is transferred between an I/O port and a memory address. A typical
example of the DC in 8237 compatible DMA mode is given in
Figure 26
.
The 8237 has two control signals for each DMA channel: DREQ (DMA Request) and
DACK (DMA Acknowledge). General control signals are HRQ (Hold Request) and
HLDA (Hold Acknowledge). The bus operation is controlled by MEMR (Memory
Read), MEMW (Memory Write), IOR (I/O read) and IOW (I/O write).
The following example shows the steps that occur in a typical DMA transfer:
1. The DC receives a data packet in one of its endpoint buffer memory. The packet
must be transferred to memory address 1234H.
2. The DC asserts the DREQ2 signal requesting the 8237 for a DMA transfer.
3. The 8237 asks the CPU to release the bus by asserting the HRQ signal.
4. After completing the current instruction cycle, the CPU places the bus control
signals (MEMR, MEMW, IOR and IOW) and the address lines in three-state and
asserts HLDA to inform the 8237 that it has control of the bus.
5. The 8237 now sets its address lines to 1234H and activates the MEMW and IOR
control signals.
6. The 8237 asserts DACK to inform the DC that it will start a DMA transfer.
7. The DC now places the word to be transferred on the data bus lines because its
RD signal was asserted by the 8237.
8. The 8237 waits one DMA clock period and then deasserts MEMW and IOR. This
latches and stores the word at the desired memory location. It also informs
the DC that the data on the bus lines has been transferred.
9. The DC deasserts the DREQ2 signal to indicate to the 8237 that DMA is no
longer needed. In the
Single cycle mode,
this is done after each byte or word; in
the
Burst mode
, following the last transferred byte or word of the DMA cycle.
10. The 8237 deasserts the DACK output indicating that the DC must stop placing
data on the bus.
Fig 26. DC in 8327 compatible DMA mode.
D0 to D15
CPU
004aaa047
RAM
ISP1362
DMA
CONTROLLER
8237
DREQ
DREQ2
DACK2
HRQ
HLDA
HRQ
HLDA
DACK
IOR
IOW
MEMR
MEMW
RD
WR
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISP1362BD | Single-chip Universal Serial Bus On-The-Go controller |
| ISP1362EE | Single-chip Universal Serial Bus On-The-Go controller |
| ISP1501 | Hi-Speed Universal Serial Bus peripheral transceiver |
| ISP1520 | Hi-Speed Universal Serial Bus hub controller |
| ISP1520BD | Hi-Speed Universal Serial Bus hub controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISP1362BD | 功能描述:USB 接口集成電路 USB OTG CONTROLLER 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 |
| ISP1362BD,118 | 功能描述:USB 接口集成電路 USB OTG CONTROLLER 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 |
| ISP1362BD,151 | 功能描述:USB 接口集成電路 USB OTG CONTROLLER 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 |
| ISP1362BD,157 | 功能描述:USB 接口集成電路 USB OTG CONTROLLER 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 |
| ISP1362BD157 | 制造商:NXP Semiconductors 功能描述:IC CONTROLLER USB-OTG 64LQFP 制造商:ST-Ericsson 功能描述:IC CONTROLLER USB OTG 64-LQFP |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。