- 您现在的位置：买卖IC网 > PDF目录1912 > DP83848HSQ/NOPB (National Semiconductor)IC TXRX ETHERNET PHYTER 40-LLP PDF资料下载
参数资料
| 型号： | DP83848HSQ/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 26/82页 |
| 文件大小： | 0K |
| 描述： | IC TXRX ETHERNET PHYTER 40-LLP |
| 产品培训模块： | PHYTER® Family |
| 标准包装： | 1 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | 以太网 |
| 电源电压： | 3 V ~ 3.6 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-LLP-EP（6x6） |
| 包装： | 剪切带 (CT) |
| 配用： | DP83848H-MAU-EK-ND - BOARD EVALUATION DP83848H |
| 其它名称： | *DP83848HSQ/NOPB DP83848HSQCT |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页当前第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页
31
www.national.com
DP
83
84
8
H
4.3.6 Jabber Function
The jabber function monitors the DP83848H's output and
disables the transmitter if it attempts to transmit a packet
of longer than legal size. A jabber timer monitors the
transmitter and disables the transmission if the transmitter
is active for approximately 85 ms.
Once disabled by the Jabber function, the transmitter
stays disabled for the entire time that the ENDEC mod-
ule's internal transmit enable is asserted. This signal has
to be de-asserted for approximately 500 ms (the “unjab”
time) before the Jabber function re-enables the transmit
outputs.
The Jabber function is only relevant in 10BASE-T mode.
4.3.7 Automatic Link Polarity Detection and
Correction
The DP83848H's 10BASE-T transceiver module incorpo-
rates an automatic link polarity detection circuit. When
three consecutive inverted link pulses are received, bad
polarity is reported.
A polarity reversal can be caused by a wiring error at
either end of the cable, usually at the Main Distribution
Frame (MDF) or patch panel in the wiring closet.
The bad polarity condition is latched in the 10BTSCR reg-
ister. The DP83848H's 10BASE-T transceiver module cor-
rects for this error internally and will continue to decode
received data correctly. This eliminates the need to correct
the wiring error immediately.
4.3.8 Transmit and Receive Filtering
External 10BASE-T filters are not required when using the
DP83848H, as the required signal conditioning is inte-
grated into the device.
Only isolation transformers and impedance matching
resistors are required for the 10BASE-T transmit and
receive interface. The internal transmit filtering ensures
that all the harmonics in the transmit signal are attenuated
by at least 30 dB.
4.3.9 Transmitter
The encoder begins operation when the Transmit Enable
input (TX_EN) goes high and converts NRZ data to pre-
emphasized Manchester data for the transceiver. For the
duration of TX_EN, the serialized Transmit Data (TXD) is
encoded for the transmit-driver pair (PMD Output Pair).
TXD must be valid on the rising edge of Transmit Clock
(TX_CLK). Transmission ends when TX_EN deasserts.
The last transition is always positive; it occurs at the cen-
ter of the bit cell if the last bit is a one, or at the end of the
bit cell if the last bit is a zero.
4.3.10 Receiver
The decoder detects the end of a frame when no addi-
tional mid-bit transitions are detected. Within one and a
half bit times after the last bit, carrier sense is de-asserted.
Receive clock stays active for five more bit times after
CRS goes low, to guarantee the receive timings of the
controller.
相关PDF资料 |
PDF描述 |
|---|---|
| DP83848YB/NOPB | IC TXRX ETHERNET PHYTERA 48-LQFP |
| DRM4000-N00-232 | DRM 4000 MODULE |
| DRM4000L-N00-232 | MODULE DEAD RECKONING RS-232 |
| DS100BR111SQE/NOPB | IC REPEATER 10.3GBPS 2CH 24LLP |
| DS10BR254TSQX/NOPB | IC LVDS REPEAT 1.5GBPS 1:4 40LLP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DP83848I | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Industrial Temperature Single Port 10/100 Mb/s Ethernet Physical Layer Transceiver |
| DP83848I_08 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PHYTER? - Industrial Temperature Single Port 10/100 Mb/s Ethernet Physical Layer Transceiver |
| DP83848I-MAU-EK | 功能描述:BOARD EVALUATION DP83848I RoHS:否 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| DP83848I-MAU-EK/NOPB | 功能描述:以太网开发工具 DP83848 MAU CARD IND TEMP RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压: |
| DP83848I-POE-EK | 功能描述:以太网开发工具 DP83848 POE CARD IND TEMP RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压: |
发布紧急采购，3分钟左右您将得到回复。