参数资料
型号: DP83848HSQ/NOPB
厂商: National Semiconductor
文件页数: 16/82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
www.national.com
22
D
P
83
84
8H
3.3.3 Serial Management Preamble Suppression
The DP83848H supports a Preamble Suppression mode
as indicated by a one in bit 6 of the Basic Mode Status
Register (BMSR, address 01h.) If the station management
entity (i.e. MAC or other management controller) deter-
mines that all PHYs in the system support Preamble Sup-
pression by returning a one in this bit, then the station
management entity need not generate preamble for each
management transaction.
The DP83848H requires a single initialization sequence of
32 bits of preamble following hardware/software reset. This
requirement is generally met by the mandatory pull-up
resistor on MDIO in conjunction with a continuous MDC, or
the management access made to determine whether Pre-
amble Suppression is supported.
While the DP83848H requires an initial preamble
sequence of 32 bits for management initialization, it does
not require a full 32-bit sequence between each subse-
quent transaction. A minimum of one idle bit between man-
agement transactions is required as specified in the IEEE
802.3u specification.
Figure 4. Typical MDC/MDIO Read Operation
Figure 5. Typical MDC/MDIO Write Operation
MDC
MDIO
00 0
11
110 0 00 000
(STA)
Idle
Start
Opcode
(Read)
PHY Address
(PHYAD = 0Ch)
Register Address
(00h = BMCR)
TA
Register Data
Z
MDIO
(PHY)
Z
0 0 0 1 1 0 0 0 1 0 0 0000 0 0 Z
Idle
Z
MDC
MDIO
00
0
11
11 0 0 0 0 000
(STA)
Idle
Start Opcode
(Write)
PHY Address
(PHYAD = 0Ch)
Register Address
(00h = BMCR)
TA
Register Data
Z
0 0 0
0 00
0 0 0 0 0 000 Z
Idle
10 0
0
Z
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: