- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2012 > MC92603VF (Freescale Semiconductor)IC TXRX ETH QUAD GIG 256-MAPBGA PDF資料下載
參數(shù)資料
| 型號(hào)： | MC92603VF |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 68/126頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX ETH QUAD GIG 256-MAPBGA |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 收發(fā)器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 4/4 |
| 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： | 256-LBGA |
| 供應(yīng)商設(shè)備封裝： | 256-MAPBGA |
| 包裝： | 托盤 |
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)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)當(dāng)前第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)
Receiver
MC92603 Quad Gigabit Ethernet Transceiver Reference Manual, Rev. 1
3-12
Freescale Semiconductor
When RCCE is high, the configuration signal, RECV_REF_A, is used to select the clock to be used. If
RECV_REF_A is high, channel A’s recovered clock is used for all four channels. If it is low, then each
channel uses its own recovered clock. If RECV_REF_A is high, it is assumed that all four channels are
operating at an identical frequency.
In order to track a transmitter frequency that is offset from the receiver’s reference clock frequency, the
duty cycle and period of the RECV_x_RCLK is modulated. For example, if the transmitter is sending data
at a rate faster than the receiver, then a shortened cycle is generated as needed to track the incoming data
rate. Alternately, if the transmitter is running slower than the receiver, then a long cycle is generated. The
recovered clock duty cycle may be reduced or increased by 200 ps (if nominal frequency is 125 MHz) in
order to match the transmitter frequency. For example, if the reference clock frequency is 125 MHz, this
means that the minimum recovered clock cycle time is 7.8 ns and the maximum recovered clock cycle is
8.2 ns.
NOTE
Devices that interface to a MC92603 and are run in a recovered clock mode,
must be able to tolerate this modulated clock.
When operating in the recovered clock timing mode, the addition or deletion of IDLEs is inappropriate. If
RCCE is asserted (recovered clock timing mode), the add/delete IDLE enable, ADIE, signal must be low.
3.6.2
Reference Clock Timing Mode (RCCE = Low)
Data is timed relative to the local reference clock when RCCE is low. Synchronization between the
recovered clock and the reference clock is handled by the receiver interface. Frequency offset between the
transmitter’s reference clock and the receiver’s reference clock causes overrun/underrun situations.
Overrun occurs when the link partner’s transmitter is running faster than the receiver. Underrun occurs
when the transmitter is running slower than the receiver. To avoid overrun/underrun conditions, rate
adaption performed whereby, data is dropped or repeated to allow the data to be presented at the interface
at the local reference clock frequency. Table 3-7 summarizes the rate adaption technique as a function of
the receiver configuration when the receiver reference clock is slower than the transmitter reference clock.
Table 3-8 summarizes the rate adaption technique as a function of the receiver configuration when the
receiver reference clock is faster than the transmitter reference clock.
The ability to drop/repeat data is controlled by the ADIE configuration input. For instance, if ADIE is high
and COMPAT is low, pairs of IDLE bytes (K28.5) will be dropped/repeated. If an overrun situation is
imminent (transmitter is faster than the receiver), then the receiver interface searches for a pair of IDLE
bytes to drop. Two consecutive IDLE bytes are dropped to assure that running disparity is not affected. If
sufficient IDLE patterns are not available to drop, the receiver overrun may occur. When an overrun
occurs, the ‘overrun’ error is reported as described in Table 3-12, Table 3-15, or Table 3-16 for a 1-byte
clock period and 2 code groups of data are dropped. A sufficient number of IDLEs must be transmitted to
guard against an overrun.
The frequency of IDLEs can be computed, based on the maximum frequency offset between the
transmitter and receiver in the system. The number of bytes (code groups) that can be transmitted between
a pair of IDLEs is:
(2*106/N) – 1 bytes, where N is the frequency offset in ppm.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC92604VM | IC ETH TXRX DUAL GIG 196-MAPBGA |
| MC92604ZT | IC TXRX ETH DUAL GIG 196-MAPBGA |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC92603VM | 功能描述:IC ETH TXRX QUAD GIG 256-MAPBGA RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) |
| MC92604VM | 功能描述:IC ETH TXRX DUAL GIG 196-MAPBGA RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) |
| MC92604ZT | 功能描述:IC TXRX ETH DUAL GIG 196-MAPBGA RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:25 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:4.5 V ~ 5.5 V 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:16-PDIP 包裝:管件 |
| 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。