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參數(shù)資料
| 型號： | 78Q2133/F |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 37/38頁 |
| 文件大小： | 0K |
| 描述： | TXRX 10/100 MDIX 3.3V IND 32-QFN |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 490 |
| 類型： | PHY 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 4/4 |
| 規(guī)程： | IEEE 802 |
| 電源電壓： | 3 V ~ 3.6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤 |
| 供應商設(shè)備封裝： | 32-QFN 裸露焊盤（5x5） |
| 包裝： | 管件 |
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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.
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參數(shù)描述 |
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| 78Q2133R/F | 功能描述:以太網(wǎng) IC 10/100 Fast Ethernet MicroPHY RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| 78Q2133R/F1 | 功能描述:以太網(wǎng) IC RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| 78Q2133S/F | 功能描述:1/1 Transceiver Full Ethernet 32-TQFN (5x5) 制造商:maxim integrated 系列:- 包裝:管件 零件狀態(tài):有效 類型:收發(fā)器 協(xié)議:以太網(wǎng) 驅(qū)動器/接收器數(shù):1/1 雙工:全 接收器滯后:- 數(shù)據(jù)速率:- 電壓 - 電源:3.3V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:32-WFQFN 裸露焊盤 供應商器件封裝:32-TQFN（5x5） 標準包裝:490 |
| 78Q2133SR/F | 功能描述:1/1 Transceiver Full Ethernet 32-TQFN (5x5) 制造商:maxim integrated 系列:- 包裝:帶卷（TR） 零件狀態(tài):有效 類型:收發(fā)器 協(xié)議:以太網(wǎng) 驅(qū)動器/接收器數(shù):1/1 雙工:全 接收器滯后:- 數(shù)據(jù)速率:- 電壓 - 電源:3.3V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:32-WFQFN 裸露焊盤 供應商器件封裝:32-TQFN（5x5） 標準包裝:2,500 |
| 78Q8340-ARM9-EVM | 功能描述:開發(fā)板和工具包 - ARM 700-78Q8340ARM9-EVM- Kit RoHS:否 制造商:Arduino 產(chǎn)品:Development Boards 工具用于評估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口類型:DAC, ICSP, JTAG, UART, USB 工作電源電壓:3.3 V |
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