參數(shù)資料
型號： CDK8920A
廠商： Cirrus Logic, Inc.
英文描述： CRYSTAL LAN ISA PLUG-AND-PLAY ETHERNET CONTROLLER
中文描述： 水晶藍(lán)的ISA即插即用，即插即用以太網(wǎng)控制器
文件頁數(shù)： 91/144頁
文件大?。?/td> 1229K
代理商： CDK8920A
detecting the incoming frame’s End-of-Frame
(EOF) sequence.
Like all Event bits, RxDest and Rx128 are set by
the CS8920A whenever the appropriate event oc-
curs. Unlike other Event bits, RxDest and Rx128
may be cleared by the CS8920A without host in-
tervention. All other event bits are cleared only
by the host reading the appropriate event register,
either directly or through the Interrupt Status
Queue (ISQ). (RxDest and Rx128 can also be
cleared by the host reading the BufEvent register,
either directly or through the Interrupt Status
Queue). Figure 5.4 provides a diagram of the
Early Interrupt process.
Acceptance Filtering:
The third step of pre-proc-
essing is to determine whether or not to accept
the frame by comparing the frame with the crite-
ria programmed into the RxCTL register
(Register 5). When the receive frame passes the
Acceptance filter, the frame is buffered, either on
chip or in host memory via DMA. If the frame
fails the Acceptance filter, it is discarded. The re-
sults of the Acceptance filter are reported in the
RxEvent register (Register 4).
Normal Interrupt Generation:
The final step of
pre-processing is to generate any enabled inter-
rupts that are triggered by the incoming frame.
Interrupt generation occurs when the entire frame
has been buffered (up to the first 1518 bytes).
For more information about interrupt generation,
see Section 5.1.
5.2.4
Held vs. DMAed Receive Frames
All accepted frames are either held in on-chip
RAM until processed by the host, or stored in
host memory via DMA. A receive frame that is
held in on-chip RAM is referred to as a held re-
ceive frame. A frame that is stored in host
memory via DMA is a DMAed receive frame.
This section describes buffering and transferring
held receive frames. Sections 5.5 through 5.7 de-
scribe DMAed receive frames.
Pass
DA Filter
Discard Frame
Destination
Address Filter
Check:
- PromiscuousA
- IAHashA
- MulticastA
- IndividualA
- BroadcastA
Receive Frame
Yes
No
Yes
No
Generate Interrupts
Check:
- RxOKiE
- ExtradataiE
- CRCerroriE
- RuntiE
- RxDMAiE
Pre-Processing
Complete
Generate Early
Interrupts if Enabled
(see figure 5.3)
Acceptance Filter
Check:
- RxOKA
- ExtradataA
- RuntA
- CRCerrorA
Status of receive
frame reported in
RxEvent register,
frame discarded.
Status of receive
frame reported in
RxEvent register,
frame accepted
into on-chip RAM
Pass
Accept.
Filter
Figure 5.3. Receive Frame Pre-Processing
CS8920A
DS238PP2
91
相關(guān)PDF資料
PDF描述
CDL13005 NPN PLASTIC POWER TRANSISTOR
CDLL4150-1 SWITCHING DIODE
CDLL4567A Single Schmitt-Trigger Inverter 5-SOT-23 -40 to 85
CDLL4568 TEMPERATURE COMPENSATED ZENER REFERENCE DIODES
CDLL4568A Single Schmitt-Trigger Inverter 5-SC70 -40 to 85
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CDKEIL 功能描述:開發(fā)軟件 Devel Software and Documention CD RoHS:否 制造商:Atollic Inc. 產(chǎn)品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors
CDKEIL-US 功能描述:開發(fā)軟件 DEVELOPMENT SOFTWARE AND DOCUMENTATION CD RoHS:否 制造商:Atollic Inc. 產(chǎn)品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors
CDKWM1804-S-1 功能描述:WM1804 - Audio, Audio Processing Evaluation Board 制造商:cirrus logic inc. 系列:- 零件狀態(tài):有效 主要用途:音頻，音頻處理 嵌入式:- 使用的 IC/零件:WM1804 主要屬性:- 輔助屬性:- 所含物品:板 標(biāo)準(zhǔn)包裝:1
CDKWM1811A-S-1 功能描述:WM1811A - Audio, CODEC Evaluation Board 制造商:cirrus logic inc. 系列:- 零件狀態(tài):有效 主要用途:音頻編解碼器 嵌入式:- 使用的 IC/零件:WM1811A 主要屬性:- 輔助屬性:- 所含物品:板 標(biāo)準(zhǔn)包裝:1
CDKWM5102-S-1 功能描述:WM5102 - Audio, CODEC Evaluation Board 制造商:cirrus logic inc. 系列:- 零件狀態(tài):有效 主要用途:音頻編解碼器 嵌入式:- 使用的 IC/零件:WM5102 主要屬性:- 輔助屬性:- 所含物品:板 標(biāo)準(zhǔn)包裝:1
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*