- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄362345 > AOP-12D 12 CHANNEL DIGITAL TO ANALOGUE PDF資料下載
參數(shù)資料
| 型號： | AOP-12D |
| 英文描述： | 12 CHANNEL DIGITAL TO ANALOGUE |
| 中文描述： | 12通道數(shù)模 |
| 文件頁數(shù)： | 47/49頁 |
| 文件大?。?/td> | 227K |
| 代理商： | AOP-12D |
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頁當(dāng)前第47頁第48頁第49頁
Appendix C
Page
41
Blue Chip Technology Ltd.
01270146.doc
Page 41
To convert from a LOGICAL address to a PHYSICAL address use the following
formula:
PHYSICAL ADDRESS = (SEGMENT * 16) + OFFSET
Most programming languages allow access to the SEGMENT and OFFSET
addresses of variables in memory. For example, in QUICK BASIC the
following commands can be used:
DIM dat%(1000)
seg = VARSEG(dat%)
offs = VARPTR(dat%)
In this example, the variables “seg” and “offs” would contain the SEGMENT
and OFFSET addresses of the array “dat%”. In order to pass this address to the
DMA controller the segment and offset values need to be converted into
DMAPAGE and DMAOFFSET addresses as follows:
PhyAdd = (seg * 16) + offs
DMAPAGE = (PhyAdd / 65536) AND 15
DMAOFFSET = PhyAdd AND 65535
DMA Limitations
The DMA controller is only capable of incrementing or decrementing the
DMAOFFSET address, the DMAPAGE value is fixed throughout the transfer.
This means that a maximum of 64K bytes can be transferred in one operation.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AOP-PXB4340 | ATM OAM Processor |
| AOP3510F1 | Voltage-Feedback Operational Amplifier |
| AOP3510J3 | Voltage-Feedback Operational Amplifier |
| AOP8 | ISA BUS KARTE 8KANAL D/A WANDLER 12BIT |
| AP-30711P2-301 | Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AOP600 | 制造商:AOSMD 制造商全稱:Alpha & Omega Semiconductors 功能描述:Complementary Enhancement Mode Field Effect Transistor |
| AOP600L | 制造商:AOSMD 制造商全稱:Alpha & Omega Semiconductors 功能描述:Complementary Enhancement Mode Field Effect Transistor |
| AOP601 | 制造商:AOSMD 制造商全稱:Alpha & Omega Semiconductors 功能描述:Complementary Enhancement Mode Field Effect Transistor |
| AOP601L | 制造商:AOSMD 制造商全稱:Alpha & Omega Semiconductors 功能描述:Complementary Enhancement Mode Field Effect Transistor |
| AOP604 | 制造商:OPTEK 制造商全稱:OPTEK 功能描述:Complementary Enhancement Mode Field Effect Transistor |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。