參數(shù)資料
型號(hào): PIC12F635-I/MD
廠商: Microchip Technology
文件頁數(shù): 10/74頁
文件大小: 0K
描述: IC PIC MCU FLASH 1KX14 8DFN
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝: 91
系列: PIC® 12F
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,WDT
輸入/輸出數(shù): 5
程序存儲(chǔ)器容量: 1.75KB(1K x 14)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 128 x 8
RAM 容量: 64 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 8-VDFN 裸露焊盤
包裝: 管件
產(chǎn)品目錄頁面: 637 (CN2011-ZH PDF)
配用: AC164326-ND - MODULA SKT PM3 20QFN
XLT08DFN2-ND - SOCKET TRANSITION ICE 14DIP/8DFN
AC162057-ND - MPLAB ICD 2 HEADER 14DIP
XLT08DFN-ND - SOCKET TRANSITION ICE 8DFN
Micrel, Inc.
KSZ8841-PMQL
October 2007
18
M9999-100407-1.5
Crossover Cable
A crossover cable connects an MDI device to another MDI device, or an MDI-X device to another MDI-X device. The
following diagram shows a typical crossover cable connection between two switches or hubs (two MDI-X devices).
Figure 4. Typical Crossover Cable Connection
Auto Negotiation
The KSZ8841-PMQL conforms to the auto negotiation protocol as described by the 802.3 committee.
Auto negotiation allows unshielded twisted pair (UTP) link partners to select the best common mode of operation. In
auto negotiation, the link partners advertise capabilities across the link to each other. If auto negotiation is not
supported or the link partner to the KSZ8841-PMQL is forced to bypass auto negotiation, the mode is set by observing
the signal at the receiver. This is known as parallel mode because while the transmitter is sending auto negotiation
advertisements, the receiver is listening for advertisements or a fixed signal protocol.
The link setup is shown in the following flow diagram (Figure 3).
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