参数资料
型号: ST72F324K2B3
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
封装: 0.400 INCH, SHRINK, PLASTIC, DIP-32
文件页数: 27/156页
文件大小: 1012K
代理商: ST72F324K2B3
ST72324J/K
122/156
CLOCK AND TIMING CHARACTERISTICS (Cont’d)
12.5.3 Crystal and Ceramic Resonator Oscillators
The ST7 internal clock can be supplied with four
different Crystal/Ceramic resonator oscillators. All
the information given in this paragraph are based
on characterization results with specified typical
external components. In the application, the reso-
nator and the load capacitors have to be placed as
close as possible to the oscillator pins in order to
minimize output distortion and start-up stabiliza-
tion time. Refer to the crystal/ceramic resonator
manufacturer for more details (frequency, pack-
age, accuracy...).
Figure 64. Typical Application with a Crystal or Ceramic Resonator
Notes:
1. The oscillator selection can be optimized in terms of supply current using an high quality resonator with small RS value.
Refer to crystal/ceramic resonator manufacturer for more details.
Symbol
Parameter
Conditio ns
Min
Max
Unit
fOSC
Oscillator Frequency 1)
LP: Low power oscillator
MP: Medium power oscillator
MS: Medium speed oscillator
HS: High speed oscillator
1
>2
>4
>8
2
4
8
16
MHz
RF
Feedback resistor
20
40
k
CL1
CL2
Recommended load capacitance ver-
sus equivalent serial resistance of the
crystal or ceramic resonator (RS)
RS=200
LP oscillator
RS=200
MP oscillator
RS=200
MS oscillator
RS=100
HS oscillator
38
32
18
15
56
46
26
21
pF
Symbol
Parameter
Conditio ns
Typ
Max
Unit
i2
OSC2 driving current
VDD=5V
LP oscillator
VIN=VSS
MP oscillator
MS oscillator
HS oscillator
80
160
310
610
150
250
450
850
A
OSC2
OSC1
fOSC
CL1
CL2
i2
RF
ST72XXX
RESONATOR
WHEN RESONATOR WITH
INTEGRATE D CAPACI TORS
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ST72F324K2T3 制造商:STMicroelectronics 功能描述:
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