參數(shù)資料
型號(hào): 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): 118/186頁
文件大小: 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頁當(dāng)前第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
Advanced Multi-Protocol Communications Controller — CD2431
Datasheet
37
5.2.1
Contexts and Channels
The registers in the CD2431 are grouped into Global, Virtual, and four sets of Per-Channel
registers. The CD2431 is normally in the background context, where the CAR (Channel Access
register) selects the channel number for the Per-Channel registers. The interrupt context begins
with the interrupt acknowledge bus cycle, and ends with a write access to the appropriate End of
Interrupt register. In the interrupt context, only the Per-Channel registers for the channel number
being serviced are available; the CAR has no effect. Most Global registers are available at all times,
but some are shared by the four channels, such as the FIFO registers. These are called Virtual
registers, and must be accessed only during an interrupt context.
Interrupt contexts can be nested so that a higher-priority interrupt service can preempt a lower
priority interrupt already in progress. The CD2431 pushes the current interrupt context onto the
stack, visible in the STK (Stack register), and enters the context for the newly acknowledged
interrupt. Any register accesses are in the new interrupt context until the host performs a write to
the appropriate EOIR for the top-level context. The CD2431 then pops the top-level context off the
stack and returns to the previous interrupt context.
5.2.2
Interrupt Registers
The IER (Interrupt Enable register) and the LIVR (Local Interrupt Vector register) are Per-Channel
registers. IER contains bits to enable or disable the various interrupt sources within the CD2431.
The LIVR value is output on the data bus during the interrupt acknowledge cycle. There are sets of
three Global registers that correspond to the three types of interrupts: Receive, Transmit, and
Modem. The Priority Interrupt Level registers (RPILR, TPILR, and MPILR) are programmed to
contain the value that is present on the address bus during the interrupt acknowledge bus cycle for
each type of interrupt. The Interrupt Status registers (RISR, TISR, or MISR) are examined during
the interrupt service routine to determine the cause of each type of interrupt. TDR and RDR
provide access to the FIFO buffers for each channel. These registers must not be accessed outside
of the proper interrupt context. A write operation to the End of Interrupt registers — REOIR,
TEOIR, or MEOIR must be the last access to the CD2431 at the end of this handler routine to
return it to its background context.
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