- 您现在的位置：买卖IC网 > PDF目录9858 > 78Q2133R/F (Maxim Integrated Products)TXRX 10/100 MDIX 3.3V IND 32-QFN PDF资料下载
参数资料
| 型号： | 78Q2133R/F |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 37/38页 |
| 文件大小： | 0K |
| 描述： | TXRX 10/100 MDIX 3.3V IND 32-QFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | PHY 收发器 |
| 驱动器/接收器数： | 4/4 |
| 规程： | IEEE 802 |
| 电源电压： | 3 V ~ 3.6 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
| 包装： | 带卷 (TR) |
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页当前第37页第38页
78Q2123/78Q2133 Data Sheet
DS_21x3_001
8
Rev. 1.6
1.4
Auto-Negotiation
The 78Q2123/78Q2133 support the auto-negotiation functions of Clause 28 of IEEE-802.3 for 10/100
Mbps operation over copper wiring. This function can be enabled via register settings. The
auto-negotiation function defaults to ON and bit MR0.12 (ANEGEN) is high after reset. Software can
disable the auto-negotiation function by writing to bit MR0.12.
The contents of register MR4 are sent to the 78Q2123/78Q2133’s link partner during auto-negotiation via
fast link pulse coding.
The default values of the auto-negotiation registers are set as follows:
Register.Bits
Function
Default Value
0.13
Speed Select
1 (100 BASE TX)
0.12
AN Enable
1 (enabled)
0.8
Duplex
1 (full duplex)
4.8/1.14
100BASE-TX
Full Duplex
1
4.7/1.13
100 BASE-TX
1
4.6/1.12
10 BASE-T
Full Duplex
1
4.5/1.11
10 BASE-T
1
These default values can be changed by writing different values to the registers, then restarting
auto-negotiation.
With auto-negotiation enabled, the 78Q2123/78Q2133 will start sending fast link pulses at power on, loss
of link or upon a command to restart. At the same time, it will look for either 10BASE-T idle, 100BASE-TX
idle, or fast link pulses from its link partner. If either idle pattern is detected, the 78Q2123/78Q2133
configure themselves in half-duplex mode at the appropriate speed. If it detects fast link pulses, it
decodes and analyzes the link code transmitted by the link partner. When three identical link code words
are received (ignoring the acknowledge bit) the link code word is stored in register MR5. Upon receiving
three more identical link code words, with the acknowledge bit set, the 78Q2123/78Q2133 configure
themselves to the highest priority technology common to the two link partners. The technology priorities
are, in descending order:
100BASE-TX, Full Duplex
100BASE-TX, Half Duplex
10BASE-T, Full Duplex
10BASE-T, Half Duplex
Once auto-negotiation is complete, register bits MR18.11:10 will reflect the actual speed and duplex that
was chosen.
If auto-negotiation fails to establish a link for any reason, register bit MR18.12 will reflect this and auto
negotiation will restart from the beginning. Writing a ‘1’ to bit MR0.9 (RANEG) will also cause
auto-negotiation to restart.
相关PDF资料 |
PDF描述 |
|---|---|
| MAX3314ECKA+T | IC TXRX RS232 460KBPS SOT23-8 |
| VI-25K-MX-F1 | CONVERTER MOD DC/DC 40V 75W |
| MS27468T11B98SB | CONN RCPT 6POS JAM NUT W/SCKT |
| MS27466P15F18SC | CONN RCPT 18POS WALL MT W/SCKT |
| VI-25J-MX-F3 | CONVERTER MOD DC/DC 36V 75W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 78Q2133S/F | 功能描述:1/1 Transceiver Full Ethernet 32-TQFN (5x5) 制造商:maxim integrated 系列:- 包装:管件 零件状态:有效 类型:收发器 协议:以太网 驱动器/接收器数:1/1 双工:全 接收器滞后:- 数据速率:- 电压 - 电源:3.3V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:32-WFQFN 裸露焊盘 供应商器件封装:32-TQFN（5x5） 标准包装:490 |
| 78Q2133SR/F | 功能描述:1/1 Transceiver Full Ethernet 32-TQFN (5x5) 制造商:maxim integrated 系列:- 包装:带卷（TR） 零件状态:有效 类型:收发器 协议:以太网 驱动器/接收器数:1/1 双工:全 接收器滞后:- 数据速率:- 电压 - 电源:3.3V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:32-WFQFN 裸露焊盘 供应商器件封装:32-TQFN（5x5） 标准包装:2,500 |
| 78Q8340-ARM9-EVM | 功能描述:开发板和工具包 - ARM 700-78Q8340ARM9-EVM- Kit RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V |
| 78Q8392L | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Low Power Ethernet Coaxial Transceiver |
| 78Q8392L/A03 | 制造商:TERIDIAN 制造商全称:TERIDIAN 功能描述:Low Power Ethernet Coaxial Transceiver |
发布紧急采购，3分钟左右您将得到回复。