參數(shù)資料
型號(hào): POE-VOICE-RD
廠商: Silicon Laboratories Inc
文件頁數(shù): 20/108頁
文件大?。?/td> 0K
描述: KIT REF DESIGN PWR OVER ETHERNET
標(biāo)準(zhǔn)包裝: 1
主要目的: 參考設(shè)計(jì),以太網(wǎng)供電(POE),語音傳輸
嵌入式: 是,MCU,8 位
已用 IC / 零件: C8051F340,CP2201,Si3400
主要屬性: 嵌入式以太網(wǎng),以太網(wǎng)供電,8 kHz 語音采樣系統(tǒng)
次要屬性: 圖形用戶界面
已供物品: 板,線纜,電源,軟件
產(chǎn)品目錄頁面: 626 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: 336-1385-ND - IC POWER OVER ETHERNET 20QFN
336-1322-ND - IC POWER OVER ETHERNET 20QFN
336-1313-ND - IC ETH CTRLR SNGL-CHIP 28QFN
336-1298-ND - IC 8051 MCU FLASH 64K 48TQFP
其它名稱: 336-1326
CP2200/1
Rev. 1.0
19
6.4. Clocking Options
The CP2200/1 can be clocked from an external parallel-mode crystal oscillator or CMOS clock. Figure 10 and
Figure 11 show typical connections for both clock source types. If a crystal oscillator is chosen to clock the device,
the crystal is started once the device is released from reset and remains on until the device reenters the reset state
or loses power.
Figure 10. Crystal Oscillator Example
Important note on external crystals: Crystal oscillator circuits are quite sensitive to PCB layout. The crystal
should be placed as close as possible to the XTAL pins on the device. The traces should be as short as possible
and shielded with a ground plane from any other traces that could introduce noise or interference.
Figure 11. External CMOS Clock Example
Table 7 lists the clocking requirements of the CP2200/1 when using a crystal oscillator or CMOS clock. Table 8
shows the electrical characteristics of the XTAL1 pin. These characteristics are useful when selecting an external
CMOS clock.
XTAL1
XTAL2
10 M
Ω
20 MHz
XTAL1
XTAL2
No Connect
20 MHz
CMOS
Clock
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