- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98081 > SIO10N268-NU (STANDARD MICROSYSTEMS CORP) MULTIFUNCTION PERIPHERAL, PQFP128 PDF資料下載
參數(shù)資料
| 型號(hào)： | SIO10N268-NU |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | MULTIFUNCTION PERIPHERAL, PQFP128 |
| 封裝： | 14 X 14 MM, 1MM THICKNESS, GREEN, TQFP-128 |
| 文件頁數(shù)： | 217/251頁 |
| 文件大?。?/td> | 1384K |
| 代理商： | SIO10N268-NU |
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頁第151頁第152頁第153頁第154頁第155頁第156頁第157頁第158頁第159頁第160頁第161頁第162頁第163頁第164頁第165頁第166頁第167頁第168頁第169頁第170頁第171頁第172頁第173頁第174頁第175頁第176頁第177頁第178頁第179頁第180頁第181頁第182頁第183頁第184頁第185頁第186頁第187頁第188頁第189頁第190頁第191頁第192頁第193頁第194頁第195頁第196頁第197頁第198頁第199頁第200頁第201頁第202頁第203頁第204頁第205頁第206頁第207頁第208頁第209頁第210頁第211頁第212頁第213頁第214頁第215頁第216頁當(dāng)前第217頁第218頁第219頁第220頁第221頁第222頁第223頁第224頁第225頁第226頁第227頁第228頁第229頁第230頁第231頁第232頁第233頁第234頁第235頁第236頁第237頁第238頁第239頁第240頁第241頁第242頁第243頁第244頁第245頁第246頁第247頁第248頁第249頁第250頁第251頁
Advanced Notebook I/O for ISA or LPC Designs
Datasheet
Rev. 0.5 (03-24-05)
Page 68
SMSC SIO10N268
DATASHEET
The following paragraphs detail the operation of the FIFO flow control. In these descriptions, <threshold>
is defined as the number of bytes available to the FDC when service is requested from the host and ranges
from 1 to 16. The parameter FIFOTHR, which the user programs, is one less and ranges from 0 to 15.
A low threshold value (i.e. 2) results in longer periods of time between service requests, but requires faster
servicing of the request for both read and write cases. The host reads (writes) from (to) the FIFO until
empty (full), then the transfer request goes inactive. The host must be very responsive to the service
request. This is the desired case for use with a "fast" system.
A high value of threshold (i.e. 12) is used with a "sluggish" system by affording a long latency period after a
service request, but results in more frequent service requests.
Non-DMA Mode - Transfers from the FIFO to the Host
This part does not support non-DMA mode.
Non-DMA Mode - Transfers from the Host to the FIFO
This part does not support non-DMA mode.
DMA Mode - Transfers from the FIFO to the Host
The FDC generates a DMA request cycle when the FIFO contains (16 - <threshold>) bytes, or the last byte
of a full sector transfer has been placed in the FIFO. The DMA controller responds to the request by
reading data from the FIFO. The FDC will deactivate the DMA request when the FIFO becomes empty by
generating the proper sync for the data transfer.
DMA Mode - Transfers from the Host to the FIFO.
The FDC generates a DMA request cycle when entering the execution phase of the data transfer
commands. The DMA controller responds by placing data in the FIFO. The DMA request remains active
until the FIFO becomes full. The DMA request cycle is reasserted when the FIFO has <threshold> bytes
remaining in the FIFO. The FDC will terminate the DMA cycle after a TC, indicating that no more data is
required.
8.7.4.3
Data Transfer Termination
The FDC supports terminal count explicitly through the TC cycle and implicitly through the
underrun/overrun and end-of-track (EOT) functions. For full sector transfers, the EOT parameter can
define the last sector to be transferred in a single or multi-sector transfer.
If the last sector to be transferred is a partial sector, the host can stop transferring the data in mid-sector,
and the FDC will continue to complete the sector as if a TC cycle was received. The only difference
between these implicit functions and TC cycle is that they return "abnormal termination" result status.
Such status indications can be ignored if they were expected.
NOTE:
When the host is sending data to the FIFO of the FDC, the internal sector count will be complete when the
FDC reads the last byte from its side of the FIFO. There may be a delay in the removal of the transfer
request signal of up to the time taken for the FDC to read the last 16 bytes from the FIFO. The host must
tolerate this delay.
8.7.4.4
Result Phase
The generation of the interrupt determines the beginning of the result phase. For each of the commands,
a defined set of result bytes has to be read from the FDC before the result phase is complete. These
bytes of data must be read out for another command to start.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SIS300 | GRAPHICS PROCESSOR, PBGA365 |
| SK12430PJT | 800 MHz, OTHER CLOCK GENERATOR, PQCC28 |
| SK12439PJ | 800 MHz, OTHER CLOCK GENERATOR, PQCC28 |
| SK12439PJT | 800 MHz, OTHER CLOCK GENERATOR, PQCC28 |
| SL15100ZIT-XXX | 200 MHz, OTHER CLOCK GENERATOR, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SIO665GT | 功能描述:界面開發(fā)工具 Evaluation Board RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| SIO666GT | 功能描述:界面開發(fā)工具 Evaluation Board RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| SIO669 | 功能描述:界面開發(fā)工具 Evaluation Board RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| SIOLS1000V2 | 制造商:SECELECTRONICS 制造商全稱:SECELECTRONICS 功能描述:Current Sensors |
| SIOLS2000V2 | 制造商:SECELECTRONICS 制造商全稱:SECELECTRONICS 功能描述:Current Sensors |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。