參數(shù)資料
型號: ISD-SR3000
文件頁數(shù): 9/120頁
文件大?。?/td> 1293K
代理商: ISD-SR3000
1-4
1—HARDWARE
ISD-SR3000
Voice Solutions in Silicon
Figure 1-2: Recommended Power-On Reset Circuit
1.2.2
The ISD-SR3000 processor provides an internal oscillator that interacts with an external clock
source through the X1 and X2/CLKIN pins. Either an external single-phase clock signal or a
crystal oscillator may be used as the clock source.
CLOCKING
EXTERNAL SINGLE-PHASE CLOCK SIGNAL
If an external single-phase clock source is used, it should be connected to the CLKIN signal as
shown in Figure 1-3, and should conform to the voltage-level requirements for CLKIN stated in
“Electrical Characteristics” on
page 1-19
.
Note
: the CLKIN signal is not 5V tolerant.
Figure 1-3:External Clock Source
CRYSTAL OSCILLATOR
A crystal oscillator is connected to the on-chip oscillator circuit via the X1 and X2 signals, as
shown in Figure 1-4.
V
CC
RESET
ISD-SR3000
V
CC
V
SS
X2/CLKIN
Clock Generator
X1
ISD-SR3000
Single-phase Clock Signal
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