參數(shù)資料
型號: HMS91C7432
廠商: HYNIX SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: HMS91C7432 features and functions
中文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PDIP20
封裝: PLASTIC, DIP-20
文件頁數(shù): 40/90頁
文件大?。?/td> 1557K
代理商: HMS91C7432
HMS9xC7132 / HMS9xC7134
36
May.2001 ver1.1
12. OSCIALLTOR
The oscillator circuit of the HMS9xC7132 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 HMS9xC7132 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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