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參數(shù)資料
型號(hào)： KS8695X-EVAL
廠商： Micrel Inc
文件頁(yè)數(shù)： 9/39頁(yè)
文件大?。?/td> 0K
描述： BOARD EVAL EXPERIMENT KS8695X
標(biāo)準(zhǔn)包裝： 1
相關(guān)產(chǎn)品： KS8695X-ND - IC SWITCH 10/100 5PORT 208PQFP
其它名稱： 576-1005
October 2004
17
M9999-102604
KS8695X
Micrel
Signal Description
System Level Hardware Interfaces
VCC
R
C
Power On Reset Circuit
RESETN
148
WRSTO
EROEN/
WRSTPLS
R
To Memory
Set WRSTO to
Active Low
To System
System Reset
84
85
KS8695X
VCC
Figure 3. Example of a Reset Circuit
System Clock
The clock to the KS8695X can be supplied by either a 25MHz ±50ppm crystal or by an oscillator. If an oscillator is used it shall
be connected to the X1 input (pin 150) on the KS8695X. If a crystal is used, it shall be connected with a circuit like the one
shown below. The 25MHz input clock is used by an internal PLL to generate the programmable SDOCLK. SDOCLK is the
system clock, and can be programmed from 25MHz to 125MHz using system clock and bus control register at offset 0x0004.
The CPUCLKSEL strap-in option on pin 96 needs to be pulled low for normal operation.
500k
25MHz
Xtal
22pF
X1
X2
150
151
SDOCLK
23
To System
25MHz to 125MHz
URTSN/
CPUCLKSEL
96
1k
KS8695X
Figure 4. Typical Clock Circuit
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