參數(shù)資料
型號: SCD243110QCD
廠商: INTEL CORP
元件分類: 微控制器/微處理器
英文描述: 4 CHANNEL(S), 134.4K bps, SERIAL COMM CONTROLLER, PQFP100
封裝: METRIC, QFP-100
文件頁數(shù): 129/186頁
文件大?。?/td> 2204K
代理商: SCD243110QCD
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頁當(dāng)前第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
Advanced Multi-Protocol Communications Controller — CD2431
Datasheet
47
Chain Mode Transfer
In Chain mode, the frame should be complete in buffers in memory before transmission is started.
The Append Status bit should not be set; the Start of Frame bit must be set to begin transmission,
and the Last Buffer bit must be set if this buffer is the last in a chained block or is a complete frame
or a block.
When the CRC bit is set, the CD2431 generates and transmits a cyclic redundancy check word for
the frame using the polynomial selected by the CPSR (CRC Polynomial Select register). If the
Interrupt Required bit is set, a host interrupt is generated after the buffer is transmitted.
Transmit buffers can be chained to support large frames. To minimize bus usage, the first buffer of
the chain should begin on an even address in host memory. The CD2431 begins fetching a frame
from a buffer performing DMA transfer, reading two bytes at a time. The CD2431 cannot realign
data between external memory and the FIFO. If one buffer of the chain ends on an odd address, the
next buffer in the chain should begin on an odd address. Otherwise, only single-byte transfers are
made for the rest of the buffer.
Append Mode Transfer (Buffer A Only)
The Append mode is available for buffer A in Asynchronous mode only. If buffer A is set to
Append mode, the host can enable the CD2431 to transmit data in the buffer before it is completely
filled. The CD2431 starts transmitting new data when it is appended to the buffer.
This mode is useful for terminal echo routines that do not wait for a complete block to be formed
before starting transmission. In this mode, transmission is started when the buffer is made available
to the CD2431 by the host; the ATBADR[3:0] and the ATBCNT[L, H] are initialized. Subsequent
triggering of DMA transfer occurs by programming the ATBCNT[L, H] with the accumulated byte
count. The ATBCNT should be written as a 16-bit word in this case, to avoid confusion between
two byte operations. The ATBADR[3:0] should not be reprogrammed during the Append mode. If
the memory space has to be moved, the Append mode must first be disabled. When the final data is
added to the append buffer and ATBCNT has been updated, the host should set the AppdCmp bit
(STCR[5]). When the CD2431 has completed the final transmission, it clears the 2431own bit in
the ATBSTS register, and generates an end-of-buffer interrupt.
相關(guān)PDF資料
PDF描述
SCG2500AI-019.44M 51.84 MHz, OTHER CLOCK GENERATOR, DSO14
SCG4525 4000/14000/40000 SERIES, PLL BASED CLOCK DRIVER, 1 TRUE OUTPUT(S), 1 INVERTED OUTPUT(S), DSO18
SCN2641CC1A28 1 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PQCC28
SCN2681TC1A44A 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PQCC44
SCN68562C2N48 2 CHANNEL(S), 4M bps, MULTI PROTOCOL CONTROLLER, PDIP48
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SCD248110QCD 功能描述:IC 4CH WAN COMMUN CTRL 100QFP RoHS:否 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標(biāo)準(zhǔn)包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:36-QFN(6x6) 包裝:* 其它名稱:Q6396337A
SCD24H 制造商:ZOWIE 制造商全稱:Zowie Technology Corporation 功能描述:Schottky Barrier Diode
SCD24L 制造商:ZOWIE 制造商全稱:Zowie Technology Corporation 功能描述:SURFACE MOUNT LOW VF SCHOTTKY BARRIER RECTIFIER
SCD24LH 制造商:ZOWIE 制造商全稱:Zowie Technology Corporation 功能描述:Schottky Barrier Diode
SCD255K851A3L28-A 制造商:Cornell Dubilier Electronics 功能描述:CAPACITOR PP MODULE, 2.5UF, 850V, Product Range:CORNELL DUBILIER - SCD Series, C 制造商:Cornell Dubilier Electronics 功能描述:FILM CAPACITOR