參數(shù)資料
型號: KSZ8851-16MQL
廠商: Micrel Inc
文件頁數(shù): 21/88頁
文件大小: 0K
描述: IC CTLR MAC/PHY NON-PCI 128-PQFP
產(chǎn)品培訓(xùn)模塊: KSZ8851 10/100 Embedded Controllers
標(biāo)準(zhǔn)包裝: 66
控制器類型: 以太網(wǎng)控制器,MAC/PHY
接口: 總線
電源電壓: 1.8V,2.5V,3.3V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 128-BFQFP
供應(yīng)商設(shè)備封裝: 128-PQFP(14x20)
包裝: 托盤
產(chǎn)品目錄頁面: 1081 (CN2011-ZH PDF)
配用: 576-3292-ND - BOARD EVALUATION KSZ8851-16MLL
其它名稱: 576-3253
2009 Microchip Technology Inc.
DS39682E-page 27
PIC18F45J10 FAMILY
3.0
OSCILLATOR
CONFIGURATIONS
3.1
Oscillator Types
The PIC18F45J10 family of devices can be operated in
five different oscillator modes:
1.
HS
High-Speed Crystal/Resonator
2.
HSPLL High-Speed Crystal/Resonator
with Software PLL Control
3.
EC
External Clock with FOSC/4 Output
4.
ECPLL External Clock with Software PLL
Control
5.
INTRC Internal 31 kHz Oscillator
Four of these are selected by the user by programming
the FOSC<2:0> Configuration bits. The fifth mode
(INTRC) may be invoked under software control; it can
also be configured as the default mode on device
Resets.
3.2
Crystal Oscillator/Ceramic
Resonators (HS Modes)
In HS or HSPLL Oscillator modes, a crystal or ceramic
resonator is connected to the OSC1 and OSC2 pins to
establish oscillation. Figure 3-1 shows the pin
connections.
The oscillator design requires the use of a parallel cut
crystal.
FIGURE 3-1:
CRYSTAL/CERAMIC
RESONATOR OPERATION
(HS OR HSPLL
CONFIGURATION)
TABLE 3-1:
CAPACITOR SELECTION FOR
CERAMIC RESONATORS
Note:
Use of a series cut crystal may give a fre-
quency out of the crystal manufacturer’s
specifications.
Typical Capacitor Values Used:
Mode
Freq.
OSC1
OSC2
HS
8.0 MHz
16.0 MHz
27 pF
22 pF
27 pF
22 pF
Capacitor values are for design guidance only.
These capacitors were tested with the resonators
listed below for basic start-up and operation. These
values are not optimized
.
Different capacitor values may be required to produce
acceptable oscillator operation. The user should test
the performance of the oscillator over the expected
VDD and temperature range for the application.
See the notes following Table 3-2 for additional
information.
Resonators Used:
4.0 MHz
8.0 MHz
16.0 MHz
Note 1:
See Table 3-1 and Table 3-2 for initial values of
C1 and C2.
2:
A series resistor (RS) may be required for AT
strip cut crystals.
3:
RF varies with the oscillator mode chosen.
C1(1)
C2(1)
XTAL
OSC2
OSC1
RF(3)
Sleep
To
Logic
PIC18F45J10
RS(2)
Internal
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KSZ8851MLL 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Single Port MAC/PHY Controller with Non PCI Interface