- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2012 > MC92604ZT (Freescale Semiconductor)IC TXRX ETH DUAL GIG 196-MAPBGA PDF資料下載
參數(shù)資料
| 型號(hào)： | MC92604ZT |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 72/122頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX ETH DUAL GIG 196-MAPBGA |
| 標(biāo)準(zhǔn)包裝： | 630 |
| 類型： | 收發(fā)器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 2/2 |
| 規(guī)程： | 千兆位以太網(wǎng) |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 196-LBGA |
| 供應(yīng)商設(shè)備封裝： | 196-MAPBGA（15x15） |
| 包裝： | 托盤 |
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頁當(dāng)前第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
Receiver
MC92604 Dual Gigabit Ethernet Transceiver Reference Manual, Rev. 1
Freescale Semiconductor
3-19
3.7.2.4
Data Context
The data context is when the transceivers are transmitting data frames encapsulated into code group
packets. The code groups in the packet cannot be disturbed, therefore, rate adaption is accomplished in the
IPG as described above.
On detection of an imminent overflow, the MC92604 searches for and deletes an /I2/ ordered set, removing
a total of two or four code groups from the IPG.
On detection of an imminent underflow, the MC92604 searches for a /I2/ ordered set and inserts an /I2/
adjacent to it into the IPG, adding a total of two code groups.
A special case that must be considered in the data context is Jumbo frames. Jumbo frames are not
supported in the standard but are rather a defacto-standard. Jumbo frames violate the untagged maximum
frame size of 1518 code groups and increases the size to 14K code groups. Given a maximum total
frequency offset of 200 ppm, a Jumbo frame could lead to a surplus or deficit of 3.0 code groups for which
rate adaption must account.
The depth of the receivers elastic buffers may be increased by asserting JPACK in order to ensure against
starvation in the presence of Jumbo frames. This increase will lead to longer receiver latency.
3.7.3
Error Handling
The receiver interface error reporting mechanisms as described in Section 3.7.1.2, “TBI Operation,” and
Table 3-10 are used in the compatibility mode with one further definition; overrun/underrun errors are
processed specially.
Overrun may occur when an appropriate code group to remove cannot be identified. In this situation, one
code group is replaced in the data stream (to report the error), and a second data code group is removed
from the packet stream. The received packet stream continues normally thereafter. The MAC sublayer
should detect the repeated code group as a CRC error.
Underrun may occur when an appropriate code group to insert cannot be identified. In this situation, one
data code group is repeated in the packet stream. The received packet stream continues normally thereafter.
The repeated code group is reported as an underrun error as described in Section 3.7.1.2, “TBI Operation,”
and Table 3-10. The MAC sublayer should detect the repeated code group as a CRC error.
3.7.3.1
Jumbo Frame Considerations
It is recommended if Jumbo frames are to be supported, that the ‘recovered clock mode’ (RCCE is high)
be used to reduce power and latency. It should be noted that it is possible for the MC92604 transmit
controller to shorten the IPG by two to achieve even/odd alignment and for the receiver to remove four
code groups in the IPG to perform rate adaption if in ‘reference clock mode.’ This means that if the IPG
is only 12 code groups originally, then the receiver could present an IPG as small as 6 code groups (with
maximum frequency offset).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MCP2120T-I/SL | IC ENCODR/DECODR 2.5V IR 14-SOIC |
| MCP2122-E/P | IC ENCODER/DECODER IRDA 8-DIP |
| MCP2122T-E/SNG | IC ENCODER/DECODR INFRARED 8SOIC |
| MCP3901A0T-E/SS | IC ENERGY METER AFE 2CH 20-SSOP |
| MCP3903T-E/SS | IC AFE 24BIT 64KSPS 6CH 28SSOP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC92610 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Quad 3.125 Gbaud SERDES |
| MC92610VF | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Quad 3.125 Gbaud SERDES |
| MC928G | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
| MC929F | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: |
| MC929G | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。