參數(shù)資料
型號(hào)： HMS97C7134
英文描述： [Monitor]
中文描述： [顯示器]
文件頁(yè)數(shù)： 36/86頁(yè)
文件大?。?/td> 1508K
代理商： HMS97C7134
HMS91C7134
36
November.2001 ver1.0
12. OSCIALLTOR
The oscillator circuit of the HMS9xC7134 is a single stage invert-
ing amplifier in a Pierce oscillator configuration. The circuitry
between XTAL1 and XTAL2 is basically an inverter biased to the
transfer point. Either a crystal or ceramic resonator can be used as
the feedback element to complete the oscillator circuit. Both are
operated in parallel resonance.
XTAL1 is the high gain amplifier input, and XTAL2 is the out-
put. To drive the HMS9xC7134 externally, XTAL1 is driven
from an external source and XTAL2 left open-circuit.
Figure 12-1 Oscillator configuration
Main clock
Minimum instruction cycle time
(ex:NOP ; f
ex
12clock is needed)
1uS
12MHz
XTAL1
XTAL2
XTAL1
XTAL2
External clock
10 ~ 16MHz
reset
Vdd
reset
Vdd
4.2V
ideal
standard; R=10K
C=10uF (Recommanded)
reset IC
R
C
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