- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄379803 > CD1865 (Intel Corp.) Intelligent Eight-Channel Communications Controller PDF資料下載
參數(shù)資料
| 型號(hào)： | CD1865 |
| 廠(chǎng)商： | Intel Corp. |
| 英文描述： | Intelligent Eight-Channel Communications Controller |
| 中文描述： | 智能八通道通信控制器 |
| 文件頁(yè)數(shù)： | 40/150頁(yè) |
| 文件大?。?/td> | 871K |
| 代理商： | CD1865 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)當(dāng)前第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)第142頁(yè)第143頁(yè)第144頁(yè)第145頁(yè)第146頁(yè)第147頁(yè)第148頁(yè)第149頁(yè)第150頁(yè)
CD1865
—
Intelligent Eight-Channel Communications Controller
40
Datasheet
5.5.4
Method 3b
—
Polled Interface
This method is illustrated in
Figure 11
. Polled operation can be used with any type of host CPU, or
it can be used in combination with interrupts to provide a mixed-mode system optimized for a
particular application. In a polled system, the host reads the Service Request Status register (SRSR)
within the CD1865 to determine whether there are any channels that need service. (Note that unlike
traditional UARTs, only one register needs to be read to determine if there are any channels in any
device that need attention, and this saves time).
If the host finds channels needing service, it acknowledges the required type by reading one of the
three Request Acknowledge registers. These provide a vector that can be used to jump directly to
the correct service routine. Processing from this point proceeds as in the case of interrupt-driven
operation. Note that the difference between this method and Method 2b lies in how the host system
becomes aware of the need to service the CD1865. In Method 2b a single interrupt starts the
process. In Method 3b the host polls periodically. The two methods can be combined
—
an
interrupt triggers the first service, but the host continues to poll until any other pending requests are
serviced.
Figure 10. Single-Level Interrupt with Single-Level Acknowledge Example
CD1865 # 1
CD1865 # 2
MICROPROCESSOR
ADDRESS
DECODE
LOGIC
A1
–
A3
A8
–
A23
A4
–
A7
D0
–
D7
ALE
INT
A0
–
A2
A3
–
A6
CS*
D0-D7
RREQ*
TREQ*
MREQ*
A0
–
A2
A3
–
A6
CS*
D0
–
D7
RREQ*
TREQ*
MREQ*
ACKIN* ACKOUT*
ACKOUT* ACKIN*
OR
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CD22100 | CMOS 4 x 4 Crosspoint Switch with Control Memory High-Voltage Type (20V Rating) |
| CD22100E | CMOS 4 x 4 Crosspoint Switch with Control Memory High-Voltage Type (20V Rating) |
| CD22100F | CMOS 4 x 4 Crosspoint Switch with Control Memory High-Voltage Type (20V Rating) |
| CD22101 | CMOS 4 x 4 x 2 Crosspoint Switch with Control Memory |
| CD22101E | CMOS 4 x 4 x 2 Crosspoint Switch with Control Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CD1865N | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:Analog IC |
| CD1865P | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:Analog IC |
| CD1866N | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:Analog IC |
| CD1866P | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:Analog IC |
| CD1867N | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:Analog IC |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。