- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄16169 > 78Q8430-ARM9-EVM (Maxim Integrated Products)EVALUATION MODULE 78Q8430 ARM9 PDF資料下載
參數(shù)資料
| 型號： | 78Q8430-ARM9-EVM |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 27/88頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVALUATION MODULE 78Q8430 ARM9 |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1 |
| 系列： | * |
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頁當前第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
DS_8430_001
78Q8430 Data Sheet
Rev. 1.2
33
Data Byte
WCS
CAM
Reference
Word
CAM Address
Control Signals
EOF
Figure 14: Classification Architecture
The CAM is a 128-word by 15-bit wide content addressable memory. When a reference data word is
applied to the CAM, the result is the highest numbered address that contains a data word that matches
the reference. Each data word contained in the CAM also contains 15 mask bits that conditionally disable
individual data bits from preventing a match. Address 0 is reserved and can never match such that no
reference data can ever result in a CAM address of zero. Address 1 is also reserved and always
matches such that a reference word that does not match any entry in the CAM will give a result of one.
Associated with each CAM entry is a control word. When a reference data word is presented to the CAM
and an address results, the control word associated with that address is passed to the control logic that
determines the next action taken by the packet classifier.
The control logic can execute any of the following actions:
Set the most significant byte of the pause counter.
Set the least significant byte of the pause counter.
Start the pause timer.
Cause the packet to be dropped.
Wake the host from power down mode (starts the HNR timer).
Interrupt the host.
Manipulate the classification result reported in the RPSR.
Identify multicast/broadcast frames for RMON statistics.
Identify the Len/Type field for frame size checking.
Identify the IP header for checksum checking.
To facilitate classification, the control logic contains a general purpose 8-bit register, ‘X’ and a 5-bit
counter, ‘C’. The ‘X’ register can be used to store a packet byte or a CAM result for later use. The
counter can be used as a loop index to iterate a set of rules a fixed number of times. The TOC action is
used to set the counter and the DEC action is used to decrement the counter. When a DEC action
causes the counter to expire, the loop is broken by decrementing the actual CAM address of the rule that
executed the DEC action for the purposes of the next CAM reference word. To prevent ambiguity, the
rule immediately below a rule that uses the DEC action should generally not be used.
Additionally, the control logic is responsible for generating the next 15-bit CAM match word by
concatenating the next 8-bit packet data byte or the ‘X’ register value with the 7-bit address of the current
CAM match. At the beginning of the packet, the previous CAM match is initialized to zero as is the
control logic ‘X’ register. The CAM address of zero is reserved and will never result from a CAM match
such that the first data byte in the frame is guaranteed to be the only byte that is accompanied by a zero
value for the previous hit. In other words, a CAM rule with a specified value for the previous hit of zero
will only match the first byte of the frame.
相關PDF資料 |
PDF描述 |
|---|---|
| VE-24T-EY-S | CONVERTER MOD DC/DC 6.5V 50W |
| M1YXK-2640K | IDC CABLE - MPD26K/MC26F/X |
| 382LX392M200N082 | CAP ALUM 3900UF 200V 20% SNAP |
| M3DEK-2606R | IDC CABLE - MKR26K/MC26M/MCE26K |
| ECM30DCBD-S189 | CONN EDGECARD 60POS R/A .156 SLD |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 78Q8430EBST#DB | 功能描述:以太網(wǎng)開發(fā)工具 3-in-1 Silicon Delay Line RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
| 78Q8430STEM#DB | 功能描述:以太網(wǎng)開發(fā)工具 3-in-1 Silicon Delay Line RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
| 78-R3 | 功能描述:3M SCOTCHCAST REENTERABLE SIGNAL 制造商:3m 系列:* 零件狀態(tài):在售 標準包裝:1 |
| 78-R4 | 功能描述:3M SCOTCHCAST REENTERABLE SIGNAL 制造商:3m 系列:* 零件狀態(tài):在售 標準包裝:1 |
| 78RB02 | 功能描述:SWITCH 2 POS DIP RECESSED UNSLD RoHS:否 類別:開關 >> DIP 系列:78 特色產(chǎn)品:RDM Series Rotary DIP Switch 標準包裝:70 系列:RDM 電路:十六進制 位置數(shù):16 觸點額定電壓:0.1A @ 42VDC 觸動器類型:用于工具旋轉 觸動器電平:凹槽式 安裝類型:通孔 方向:頂部觸動 可清洗:是 其它名稱:EG4977-5RDMAR16PIT |
發(fā)布緊急采購，3分鐘左右您將得到回復。