参数资料
型号: PIC16F636-E/P
厂商: Microchip Technology
文件页数: 9/74页
文件大小: 0K
描述: IC MCU FLASH 2KX14 14DIP
产品培训模块: Asynchronous Stimulus
标准包装: 30
系列: PIC® 16F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
外围设备: 欠压检测/复位,LVD,POR,WDT
输入/输出数: 11
程序存储器容量: 3.5KB(2K x 14)
程序存储器类型: 闪存
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 125°C
封装/外壳: 14-DIP(0.300",7.62mm)
包装: 管件
配用: AC164039-ND - MODULE SKT PROMATE II 20DIP/SOIC
AC162057-ND - MPLAB ICD 2 HEADER 14DIP
ACICE0207-ND - MPLABICE 14P 300 MIL ADAPTER
Micrel, Inc.
KSZ8841-PMQL
October 2007
17
M9999-100407-1.5
the decoder. When the input exceeds the squelch limit, the PLL locks onto the incoming signal and the KSZ8841-PMQL
decodes a data frame.
The receiver clock is maintained active during idle periods in between data reception.
MDI/MDI-X Auto Crossover
To eliminate the need for crossover cables between similar devices, the KSZ8841-PMQL supports HP-Auto MDI/MDI-X
and IEEE 802.3u standard MDI/MDI-X auto crossover. HP-Auto MDI/MDI-X is the default.
The auto-sense function detects remote transmit and receive pairs and correctly assigns transmit and receive pairs for
the KSZ8841-PMQL device. This feature is extremely useful when end users are unaware of cable types in addition to
saving on an additional uplink configuration connection. The auto-crossover feature can be disabled through the port
control registers.
The IEEE 802.3u standard MDI and MDI-X definitions are:
MDI
MDI-X
RJ45
Pins
Signals
RJ45
Pins
Signals
1
TD+
1
RD+
2
TD-
2
RD-
3
RD+
3
TD+
6
RD-
6
TD-
Table 1. MDI/MDI-X Pin Definitions
Straight Cable
A straight cable connects an MDI device to an MDI-X device or an MDI-X device to an MDI device. The following
diagram shows a typical straight cable connection between a network interface card (NIC) (MDI) and a switch (MDIX) or
a hub (MDI-X).
Figure 3. Typical Straight Cable Connection
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