- 您现在的位置：买卖IC网 > PDF目录1912 > DP83848YB/NOPB (National Semiconductor)IC TXRX ETHERNET PHYTERA 48-LQFP PDF资料下载
参数资料
| 型号： | DP83848YB/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 17/86页 |
| 文件大小： | 0K |
| 描述： | IC TXRX ETHERNET PHYTERA 48-LQFP |
| 标准包装： | 250 |
| 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： | 48-LQFP 裸露焊盘 |
| 供应商设备封装： | 48-LQFP 裸露焊盘（7x7） |
| 包装： | 带卷 (TR) |
| 其它名称： | DP83848YBTR |
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页当前第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页第83页第84页第85页第86页
23
www.national.com
DP
83
84
8
Y
B
3.4.3 Serial Management Preamble Suppression
The DP83848YB 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 DP83848YB 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 DP83848YB 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.
Table 5. Typical MDIO Frame Format
MII Management
Serial Protocol
<idle><start><op code><device addr><reg addr><turnaround><data><idle>
Read Operation
<idle><01><10><AAAAA><RRRRR><Z0><xxxx xxxx xxxx xxxx><idle>
Write Operation
<idle><01><01><AAAAA><RRRRR><10><xxxx xxxx xxxx xxxx><idle>
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 |
|---|---|
| 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 |
| DS1210SN/T&R | IC CONTROLLER CHIP NV IND 16SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DP83848YBX/NOPB | 功能描述:以太网 IC RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| DP83849C | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PHYTER? DUAL Commercial Temperature Dual Port 10/100 Mb/s Ethernet Physical Layer Transceiver |
| DP83849C_08 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PHYTER? DUAL Commercial Temperature Dual Port 10/100 Mb/s Ethernet Physical Layer Transceiver |
| DP83849CVS | 功能描述:以太网 IC RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| DP83849CVS | 制造商:Texas Instruments 功能描述:TRANSCEIVER, ENET PHYTER, DUAL, 80TQFP 制造商:Texas Instruments 功能描述:TRANSCEIVER, ENET PHYTER, DUAL, 80TQFP; Data Rate:100Mbps; Ethernet Type:IEEE 802.3u; Supply Voltage Min:3V; Supply Voltage Max:3.6V; Digital IC Case Style:TQFP; No. of Pins:80; Interface Type:MII, RMII, Serial; Operating Temperature;RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。